HomeMy WebLinkAboutHIGHLAND MEADOWS GEOLOGICAL REPORTS AND HAZARDS LEGAL.pdfPrinted by Tom Moorhead
From: Terri MarCinez To:
9:08am o
Domin-Lc Mauri.el l o, Lar ry crafel ,Mike Mo]-tica, Pam Brandmeyer,Moorhead subj ec L :Ordinance Number 5, Series of 1985, repeal j-nq ordinances 16 and 2 9 of 1-9 82
=:=NOT'E:=: ==9 /L7 /96==8: 55am==
It appears Efrat: ordinance numLrer 5 does
not completse1y iqnore t:he findings of
CLre Lincoln Divore Geo].oqic SLudy of
1982 on which tLre emergencf/ ordinances were based. Tfre 1985 ordinance in facts references the qeologic trazzards map
and requires ehat site epecific qeo1.oqic in\test.iqation be made with
everlr bu i 1d j- nat perm j- t- , gradinq permi t
and major or minor srrbdivigion app].ication. The retr)or L. musts be prepared by a prof essiorral Qteo].oqrist or
tr>rof ess iona1 enqineer. The reqtrirements
of Ltre retr)or t va rl,t f or the ts14)e of
deve1opmenc beinq proposed, bu.t. in this
case for a single f ami].ft home, t]he
report is required Lo certsiflz Lo the
f 01low j-nq:
Whet,her. ttre sice can be deve]-otr)ed tor
Ltre specif j-c structure or use wiLhouts
miFi^-fi^h.
Wtrel-her the proposed de\/elopment- wil].j-ncrease Lfie trazzard co sl.lrror-rndinq
pr opertsl, or strrrctr.rres, roads,
\r.ti1iLies, et'c.
If a blrildirlg permiL is issued, the
certsified site specific reportss need to
cert]ify thats adequace base dat-a ha.s
beerr pro\tided. said base datsa is used
j-n t,he desiqn and I)lanninq of the
tr)roposed proj ecL. desiqn and
constrLlction tr)roceedrlres derived from
the base data are execr-rt ed. des ign and
consLr\rction will reduce danq|er to
public Lreal-ch. TLre ordinance continues
wiLh requirements for additions and
other \rses.
AnoLtrer interesEirrq I)arL of t:he
ordinance reqlrlres the Town to fre].p
pro\zide reasorrab1e nocice Lo tLre pub1ic
ot tLre prok)1ems re]-at'ed to t'frese
qeologica].].y sensitive areas b},
recordingl a nocice on new subdivision
p].atss of a qoeloqical].y sensiLi\ze area,
p]-ans submit.ted for development- in
Lhese areas were to be stamped with ttre
qeo].oqfica]-ly sensil'\te area and zone
designac1on (r-incoln Divore Map) , prior
co recivinq a building permit in chese
areas t-l-re owner was t.o submi t Lo the
'Iown a siqrned and noterized affidawic
cerb i f lrinq acknowl edelement of the
gfeologric sensiLivit:l, of Lhe area and
strrdies conducted with regard chereLo,
etc. IL contin\res wittr requirement ttrat
].and1ords even notiflt their tenants.
I wou1d ]-ike tso meets and discuss tshis
with a1l- of you aqain wittr reqards to
wtrat we shou]-d do wiCh tshris new
information, or if in fact Pam found a
new ordinance repea1lnq Lhis one !
Page: 1
?ILT COPY
75 South Fronrage Road
Vail, Colorado 81657
3 oi -479-2 I 3 8 / 479-2 I 39
FAX 303-47e-2452
D e p artr n e nt of C onunun iry D eve lo ptne nt
August 11, 1994
Mr. Richard L. Gustafson
P.O. Box 1063
Vail. CO 81658
RE: Highland Meadows Geologic Hazard Reports
Dear Dick:
Thank you for your recent letler and attachecl geologic hazard reports tor the Highland Meadows area.
As you and I have discussed with ihe Planning and Environmental Commission (PEC), the geologic
hazard reports that you have submitted have not been adopled by the Town Council lor inclusion into
the Master Hazard Plans of the Town. In order for the Town to tormally recognize these geologic
hazard reports. it will be necessary tor the Town Council to adopt these studies during one of their
regularly scheduled evening Town Gouncil meetings.
It was not clear in your letter as to whether or not you are proposing that the Town adopt these
geologic hazard reports to be included in the Master Hazard Plans for the Town. It your intention is to
request that the Town adopt the plans, then I would like to outline the sleps that must be taken in order
to provide luil public disclosure lor the adoption of these reports:
1. A written request must be made to the Town, specifically requesting that certain
geologic ha2ard reports be adopted and be included in the Master Hazard Plans ol the
Town ol Vail. This requesl 10 amend the Town's hazard regulations must include a
$200.00 application lee, per Resolution No. 10, Series of 1991.
An up-lo-date list of all the property owners within the study area, including their mailing
addresses, must be included with the request.
The Town Engineer shall review the requested amendment and additionally, the Town
shall reserve the option of oblaining the services ol an outside consultant lo provide
professional advice regarding the proposed amendments. Should lhe Town decide to
secure the services of an outside consultant, then the following section of Resolution
No. 10, Series of 1991, shall apply:
Resolution No. 10, Series of 1991 (Q)
"Applications deemed by the Community Development
Department to have significant design, land use or oiher issues
which may have a significant impact on the community may
require review by consultants other than lown staff. Should a
determination be made by the town staft that an oulside
consultant is needed to review any applications set lodh in this
resolution, the Community Development may hire an outside
z.
3.
Mr. Guslafson
August 1 1, 1994
Page Two
consullant. lf the Community Development does hire an
outside consultant, it shall estimate the amount of money
necessary to pay him or her and this amount shall be
forwarded lo the Town by the applicant at the time he files his
application with the Community Development Department.
Upon completion of the review of the application by the
consullanl, any of the funds forwarded by the applicant for
payment of the consullant which have not been paid to the
consullant shall be returned to the applicant. Expenses
incurred by the Town in excess of the amount forwarded by the
applicant shall be paid to the Town by the applicant within 30
days of notification by the Town. This resolution shall take
etfect immediately upon its passage."
4. The Town of Vail rvill then nolity all of the property owners within the study area of the
reouested amendmenl to the Town's hazard regulations, and setting forth the public
review schedule. A review of an amendment to the Town's hazard regulations involves
a public meeting by the Planning and Environmental Commission (PEC), as well as an
evening meeting wilh the Vail Town Council. The role of the PEC is to review the
evidence submined and to make a recommendation to the Town Council. The Town
Councit review ol the request would be at a regularly scheduled evening meeting and
the adoption would need lo occur via resolution'
The above is intended to Eive you a rough idea of the general paramelers ot the proposed hazard
reguiat;ons amendmenl. Depending upon the implicalions o{ the amendment, it may be necessary lo
ha-ve several public worksessions with the PEC as well as with lhe Town Council. if you should have
any further queslions or commenls, please feel free to call me or Tom Moorhead, Town Attorney' at
479-2138 and 47-o-21 06 respectively.
Sincerely,
klA h'<z-
Mike Mollica
Acting Dii'ector of Community Development
xc: Bob McLaurin
Town Council
Tom Moorhead
Russ Forrest
Ft!-t
,or
"oo-""0 "no ",*"Tff*
Kristan Pritz
July 21 1994
Geologic Hazards Investigation and Subdivision Evaluation for Highland Park
Subdivision, Highland Meadows Subdivision, and Vail Village West, Filings 'l
and 2.
COP Y
TO:
FROM:
DATE:
SUBJECT:
Attached to the memo are the sections of the Hazard Regulations which relate to Dick
Gustafson's request to add the above studies to the Town of Vail Master Hazard Plans.
Section 18.69.030, 18.69.031, and 18.69.032 all relate to the adoption of hazard plans for the
Town of Vail.
My opinion is that in order to adopt this plan, the following steps should be taken:
1. All property owners within the study area are given public notice of the
possibility of adopting this study and its implications on development in the
study area. This meeting should be held at an evening Town Council meeting
or regularly scheduled Planning and Environmental Commission (PEC) meeting.
2. The Town Engineer reviews the study and perhaps a second outside opinion is
obtained from a consultant to make sure we agree with the study.
Assuming the Town Council wishes to adopt the plan, the plan would be
scheduled for review and adoption by the PEC at a regularly scheduled
meeting.
The Town Council would adopt the plan at an evening meeting by resolution.
Depending on the implications of the plan on various properties, it may be necessary to have
several worksessions with the public. lf you have any other questions, give me a ring'
4.
o o
,/".t P*t
n . \,
7/L<, te /02/*^
/-V44
Tom Moorhead
r { ////
-rJ'/f HuK.,e*r;h w
*f? .'*.E
r.*,
,rto;.
RI.HARD L' GUSTAFS.N
i^";,-lzil?'?"o a'16sa
13o3r 426-3276
iune 20. t994
Honorable PeggY Oslerfoss, MaYor
Town of Vail
Vail, Colorado 81657
Certified mail, return receipt requested
Dear Peggy:
During several discussions with staff members of the Planning Department and
testimony which I gave at the Design Review hearinqs regarding-my concerns about
proposed construciion in the Sierra Trail and Alpine Drive area of Highland. Meadows,
i ndve referred to a specific Geologic Hazard Report about that area. This is the same
repoft which the Town of Vail used in previous meetings with the Eagle County as far
back as 1986. I have been informed by staff that such a study does not exist in the
Town files and therefore can not be considered in any discussions about the hazard
concerns in the area.
Since the study is not available to the members of the Planning Commission, or to the
Town Council, they should be provided a copy of the report before any construction is
approved in that area.
The report makes very specific recommendations regarding site-specific hazard
studies, curbing and drainage recommendations, and sloping and retaining of areas
adjacent the roads to prevent serious movement of unstable soils. lt also raises
serious questions about the advisability of any further construction in the area.
Please see that a copy of the report is distributed to all members of the Planning
Commission and the Town Council before any further considerations or approvals
are granted for any construction in this area of West Vail.
It may even be appropriate for the Town of Vail to consider buying some of lhese
questionable lots with funds from the Real Estate Transfer Tax fund to prevent future
unnecessary liability to the Town and the taxpayers of Vail,
Richard L. Gustafson
ROE|VEUAUij i7 i994
75 South Frontage Road
Vail, Colorado 81657
s03 -479-2 I 3 8 / 479-2 I 3e
FAX 303-479-2452
Deparnnent of Communiry Developtnent
August 1 1, 1994
Mr. Bichard L. Gustalson
P.O. Box 1063
Vail, CO 81 658
RE: Highland Meadows Geologic Hazard Reports
Dear Dick:
Thank you {or your recent letter and attached geologic hazard reports for the Highland Meadows area.
As you and I have discussed with the Planning and Environmental Commission (PEC), the geologic
hazard reports that you have submitted have not been adopted by the Town Council for inclusion into
the Master Hazard Plans of the Town. In order for the Town to Jormally recognize these geologic
hazard reporls, it will be necessary for the Town Council to adopt these studies during one of their
regularly scheduled evening Town Council meetings.
It was not clear in your letter as to whether or not you are proposing that the Town adopt these
geologic hazard reports to be included in the Master Hazard Plans for the Town. lf your intention is to
request that the Town adopt the plans, then lwould like to outline the steps that must be taken in order
to provide full public disclosure Jor the adoption of these reports:
1. A written request must be made to the Town, specilically requesting that certain
geologic hazard reports be adopted and be included in the Master Hazard Plans of the
Town of Vail. This requesl to amend lhe Town's hazard regulations must inclucle a
$200.00 application fee, per Resolution No. 10, Series ol 1991.
2. An up-to-date list ot all the property owners within the study area, including their mailing
addresses, must be included with the request.
3. The Town Engineer shall review the requested amendment and additionally, the Town
shall reserve the option of oblaining the services of an outside consultant to provide
professional advice regarding the proposed amendments. Should the Town decide to
secure the services of an outside consultant, then the tollowing section of Resolution
No. 10, Series of 1991, shall apply:
Resolution No. 10, Series of 1991 (Q)
"Applications deemed by the Community Development
Department to have significant design, land use or other issues
which may have a signiticant impact on the community may
require review by consultants other than town staff. Should a
determination be made by the town staff that an outside
consultant is needed to review any applications set forth in this
resolution, the Community Development may hire an outside
Mr. Gustafson
August 1 1, 1994
Page Two
consultant. lf the Community Development does hire an
outside consultant, it shall estimate the amount of money
necessary to pay him or her and this amount shall be
forwarded to the Town by the applicant at the time he files his
application with the Community Development Department.
Upon completion ot the review of the application by the
consultant, any of the funds lorwarded by the applicant for
payment ot the consultant which have not been paid to the
consultant shall be returned to the applicant. Expenses
incurred by the Town in excess of the amount forwarded by the
applicant shall be paid to the Town by the applicant within 30
days of notification by the Town. This resolution shall take
effect immediately upon its passage."
4. The Town of Vail will then notify all of the property owners within the study area of the
reouested amendment to the Town's hazard regulations, and setting lorth the public
review schedule. A review ol an amendment lo the Town's hazard regulations involves
a public meeting by the Planning and Environmental Commission (PEC), as well as an
evening meeting with the Vail Town Council. The role of the PEC is to review the
evroence submitted and to make a recommendation to the Town Council. The Town
Council review of the request would be at a regularly scheduled evening meeting and
the adoption would need to occur via resolution'
The above is intended to give you a rough idea of the general parameters of the proposed hazard
reguiations amendment. Depending upon the implications ol the amendment, it may be necessary to
have several public worksessions with the PEC as well as with the Town Council. lf you should have
any further questions or comments, please feel free to call me or Tom Moorhead, Town Attorney, at
479-2138 and 479-21 06 respectively.
Sincerely,
klA h<2, .
Mike Mollica
Acting Diiector of Community Development
xc: Bob McLaurin
Town Council
Tom Moorhead
Russ Forrest
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olfice ol communlty development 75 3outh tronlage road
vail, colorado 81657
(303) 4792138
(303) 47$.2139
Plar Revier Bas€d oD
the 1988 Unifora Codes
PROJECT NUMBER: 92690
ADDR.ESS z 934 S. FRONTAGE ROAD
vArL, co.
oCCUPANCY: B-L
TYPE OF CONSTRUCTION: II
DRB APPROVAL REQUIRED: YES
NA}TE: OLD CHSVRON STATION GRNDWTR
TREAfi'IENT FACILITY
DATE: OCTOBER 22, l99O
CONTRACTOR: RMX CORPORATION
ARCHITECT: R}O( CORPORATION
ENGINEER: RIO( CORPORATION
PI..ANS EXAMINER: I,IICHAEI-,, WHITAKER
CORRECIIONs REQUIRED
Tbe Ltens listed belor are not intended to be a corplete listiag
of all possLble code requirenents in tbe adopted codes. It is a
guide to selected sectious of tbe codes. Tbe follosing is not to
be construed to D€ aD approval of aay violatiou of aay of the pro-
"i"i""t "f th. "d"p iI.
1. Foundation footer reguired as drawn.
2. Full frost depth not reguired due to placernent of structure
over existing tanks. However, flexible connectors for all
Iines into structure from wells and all lines exiting
structure to sewer shall be required to prevent frost heave
damage.
3. Design load reguirements:80 Ib. per sg. ft. snow load.
4. Final approval required fron Upper Eagle valley Sanitation
Distrlct for occupancy/operation of facility.
5. Field inspect all trenches and conduits prior to cover. Fence
around aI1 open trenches to prevent public risk of injury.
osHE reguired shoring required for all trenches if access
is to be made by workers.
6. All landscape as per final agreement with T.o.V. Cornnunity
Development Departnent as noted on prints.
{leurarT
ffCtjrOuoPeo
STA|EOFCOLOI(ADO
COLORADO DEPARTMENT OF HEALTH
4210 East llth Avenue Telelax:
Denver, Colorado A0220-}716 (l0l) 122-9076 (Main BlildinS/Denver)
Phone(303)]20-833]{30])]m.1529(Ptar|l|itanP|a(e,/Denver){l0ll 24E-7198 (Crand,unction Rcgiooal OIfice)
October 26, Lgm f"*il-
Chewon Corporation Thomas M. vernon' M.D.
Gordon McDavitt [recutive Director
2410 Camino Ramon
San Ramon" California 94583-0804
RE: Receipt of Site Assessment at Chevcron #70499, 934 S. Frontage Rd.,
Located h Vad, Colorado. Dated October 4 190.
Dear Mr. McDavitt:
This lefter is to acknowledge that the Hazardous Materials and Waste
Management Division, Underground Storage Tank Program, bas received the site
assessment subnitted to us for the facility located at the address notcd
abovc. The assessmcnt was received ia this offics on Ocfober 4 190.
At the present tine due to large number of submittals and our chronological
review, you will not receive a written review of your documcnt for
approximately 150 days. In the interim, if you wish to discuss the
information submitted or would like to request a meeting to dari$ specific
issueg we will be glad to accommodate you. Once our review is completod a
comment letter will be provided to you and will contain a summary of our
findin$ which outline atry concems we may have about this investigation.
The lack of response to your assessment at this time should not be interpreted
as an indication thht no action can bo taken prior to our final written
comments. We encourage you to use the basic information obtained in the site
assessment to develop a corrective action plan. If you believe that no
further action is necessary for this site, please provide a written statement
to that effect to this office.
If pu should have any concerns or questions regarding this procasg please
feel free to contaci this office at 331-4875.
Sincerely,-- (\, n 4)"r rVlb),-// / /
Larry Delin
Underground Storage Tank Program
Hazardous Materiah and Waste Management Division
LD/cg/o765/&CEr
cc Eagle County Health Department, Sanitarian
Eagle Volunteer Fire Department
o o
TO:
E'ROll:
DATE:
RE:
UEIIORANDU!,7
Board of County Cmissioners
Beth A. t{hittier, Bagle County Attorney
April 3, 1986
Hiqhland Meadoqrs
Attached are copies of the geologic hazard reports -egarding Hi-ghland Meadows which the Town of VaiI referred to dur:ng the joint Town and County meeting held March 18, 1986.
BAW,,Af
cc: Susan Vaughn, Planning Director
Doug PiJ-cher, Pub1ic Works Director
we ^-.'L
fl'(
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.t,l3Y:"to Engi neer:. ng
,1 .t1_t"s".Plaza, suita 207 br.enh/ood Springs, Cofer66q gl50l_
Atin: Mr. Elmer CJ.aycomb
Augus:16, L9g2
Re:GEOLOGIC HAZAR.DS
SUBDIVIS ION
AIGHLAND PARK
INVESTIGATION
EVALUATION
SUBDIVISTON HIGHLAND }TEADoWS
va ii^'iiiia;;",#3;,'F?ii$::' l-:FILINGS I &
WEST VArL, COLORADO
Dear tlr. Clayconb:
i::^::li:ui::e prese:.rts rhe resut E!l:'.'es:igatlo. irJ subdjvj<i,.r^ ^..-.',t ?5.a GeoJ.ogic Hazarls :'l:E:rlard veadows ana irighiaJj i.u-itucron Eor HiehLanci I ;'lll viirage rvest Fir in.c r -^,ir .rcows Filing No. z, and
7 sucmitted,
-:::COi-)t-DeVOpi TnS ?: .r-c r.Aq rur.
: 1""::ieat:on inc-suuji"r.iii":;:i .::, a Georosic ;tazarls
::glt_:i9 Meadows and diqhlana u..,i,1,1-tt:?., 1". Hishland eirk,''':.rrct::u .IeAdOwS and Highland Mea,- r\Jt nrgn.tanO Par];'rrl viirase rvesr Firin,i;-i ;r;';t":: Filin9 No. z, and , ln west Vail, Colora,lo.5:i_:6-LF,.1r
t., ri ' . \ ''\. \\\'-1i,.-g-' :,i,[r*,n ]f . I
- .cr-t ;,i. ?i:,melreicn, Jr.:/rCrESS:.:nSl Gec_l.nn i =,r
- r..1, .i=l;
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- 'i-:^; -,r--- j .J r.i.|(-.- -- G: en,,toorJ Spr
' '-:.-rala
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: - '..;. ,:r.,r:; ]3;3r";o
TABLE OF EONTENTS
Let ter of Tr:i;ii.' "ir' ."" ll;T: ..ut
Iable of lrgures
INTRODUCTION
GEOLOGTC SETTING georock
^ -Ii.nturn ForrDation Surficial Deposi ts
^. Debris Stide btacr aI Morai ne T:I.u9. Deposi rs lrr.r uv1aj. F..an De-oos i ts Colluvium & I :"tg:r iu;' ;";"t:li"tt""n DePos i ts
Sol i fl uct i on'Recent .\lluui,.lJn :<ecent SJ.urnps
jicLOGic ::AsARDS J*c-oe SiaciLitl.,
:r::rr!ace oreinage Soiis :iezards Debri s FLo.rs Se!snic -?is(
t=?::::: HA3i_RDs DEsicN.qrroNs --:azari .t;33 7 _i;z;rd A -o: .
_:azarC A!=e :::i?ari 11._:6 4S j:,i za f : -{rea -.t G -:az:rC _1.;g6 J le:.::'.1 .i.::: ic
-: ::f,r i t:"= :
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..;s?.\3La .Fr!i SioPis
Page
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:7.r.:UATION
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Pigure 2
Pigure 3
Pigure rl
.Figures 5
ligures 5
TABLE ol_FrcuREs
- Si.te locaiion Diagran
- Geoiogic Mep
- GeoJ.ogic Hazards Hap
- Subsurface Drainage Uap
A&8-DrilljngLogs
A e I _ Soil Sumnary Sheets
(tn pog1.a,
(in pq.1"a,
(in 5ns1"g,
I I
:
.I.;:.iODUCTION
o
;;;
""j"
iisation and "jn"
rorlowine pr':s
i.rest pirinss .
niehla':c ;r"acj^t,:- ::: ""i';"t;:';ttff ;r1:
;";," :j::::-: ;:#'';:' ;:'-.fi::,'.;
subdivisions
"or"
on the sitesr
fY geologic hazar?he
purpose of
generar.
"oir "o.n
atlbility wi,n
to t"tt"n and addt
and Potentiat
those areas rrr.rt'l-":s on the "".j.,*: jj:j:,t::;j:r;
:econ:nendations,o'Do'ssess subsurf
,a r r h i n t h i .,"o".t:
m i : i sa t. r a"n t iu.-"i""i';"".t#:'' :"":. ".aLso includeci
J."J ::::",.:1:'"' r) re'riew
rrrormation incruded in this report
ii""'; ;":":: " "1, :J';-",''":,"J"'.', ;:*:T ::;: ;:::
:.-ie e:{cauarion
": ::
the si te eeolosv and seoJ.os:"t::
reconnais-
c: righ ai.ti. r"0."
ttx exProratorY tesa a*;,';c
ha2ar'Js' 4)
:r:i:zsis. rhe 6;^-.,'-.i"t
prrotogra-;"t:".t"i"t;'rrJ: interpretatic:r
:.re perici of ,u,t"to
mapping f cr ti'i"
"t"av'r"':'t"",tot"tation
and
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conduc,ed rrom
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.";.:;":jji:j;-". ;"::: r'; "" :;" ];:
bie for our ,.-,,, _to"n9l
maps,,
-r:i:.acsompanylng rie skerch or'=
ror our reuiew.
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v,,c.rr o ASSOCiateS,
S,s* #*',,',:l::ll"ia:'i;-3irl:::l"i"o.ireado,vs, rtizs/77, by charj...s
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=':.1* . : ' .':.)r:s
--try ;vo"Jii';i"a.ii; 7/3/80 ' -a'qv: ?vest,
i; -" '.',n=-.trii,i5t;"ti-on-Je
-i;"r'€ consurtants or
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flltr r' r ;liOi.: .ld: .'
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j:.n irl-' : r:.:ci. til ::9?:ar . "-sv.,'v" cv cTL Thompson rnc. ,
': 'tii for nesioi
, : . :, n: 1."' g',:i;;qii "F, ii;lor" . ii",, R e.?u i
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..'r "-- ' ',:i.;'i: 'i' :..;-"1i",o'iii,P.:oqosed Parkinq Lot and ,.:r, : l r, bv rincoin:#;^llt-24' .vaii viirJgJ
i:: : .: : .....5.igarion, Lor l r _.,_::"':"
Testing Lab. , tii. ,
,
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Prf pa r e d
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i ii::::.: : :i ^ -;;.n"""lii::".:-tn:,:.:i.;,rricn,
Marrerhorn -'::ir;.';;:,
t,,. ,-::^ "-J'i:rs rto' '2 bv rhonas s"-iu'".".r"",/..r!r qt a e i l'.,:.., -'- .j::ls:.::f :ce rnv4"ti:.:r.
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- 3-
a:r.i;.i,r-t tari
The i{iglrianc Pa'rk, Highiand Me:iows riling I and ? SubCi.visions are locateC cn tr=:;oi:tlr :;iLje of Gore creek in i^iest vai.r., cororado (see 1-1gu6e :.) .The topoorephy on the ihree siEes is r763iable, with sropes ;nd Eopogr3hpic features being the result of the various geologic processes in the region' In aightand{eadons:.FrJ.rng tro: 2 an.southerLy gortion of VaiL.Village i{est, FiIing l, the topography is dominated by moderate to steeply sloging northfaeing slopes,'ri th iocar' shalrower trrcrtions' rn the west part, a small area of i:gnJ.and Iteedohrs, Filin9 2 contains gently to moderately sloping grcunc' This gentiy to rnoderately si,"aing ground continues into the HiEhrand .'4eado''vs area, where a portion of the eastern par i contains si.ruilar gentle topography. To the south and Hest,'iigniand Heador"s and Highrand park contain moderace to stee-oi:/;J-c-oijrg grounC;rith a main <irainage(ray which bisects the site..ilang the nori:e::i _3ortion cf Jighiand Meadows piling No. I anc a, aiong "/i:h porii:ns of VaiJ. Viliage i,fest tilings I and 2, is '"-:ri' st:epi:/ sio_oi nc ArounrJ desce
::j i:s arl.uca::.es
ding to the area of Gore creek
GEc!,,-'.jIs s_erti o
Vail vlLiage West ailings
steeply slcping ground in
genily slcping ground i;t
::e icm:i:a:e
.jc:j a;.ie: i-; ga
a;::: e..S::1'_,,/
-.: i _
c by mocierale to
i -_ , ani gener ai 1;.r
.30rtions.
.L and 2
the ncrth
the si te consists
Thrcughoui the
oe e i.l cc ve r ed b::
whlch wiii forn
t
;
i
'):
.:t:
Bedrock underlying
i!i.xturn iorne!ion of penns:rlvanian Age.:,; c: this:r?a, the ..linturn ioina:r,)n ita3 i=i .:rpc-;::.:, ..v!:ic:; ai? :i.te geolcgic units
,t
:
;::,:;':i,lp::^ '":."":' tvpes thar *o, be encountered ion. The location of the various geologic units -rr.,' sh,_..,,n on the Geolo_oic ilap (i n pocxet.y .
tseCr oc k .-----
Minturn pormation (nm;,
As previously nencioned, the Mlnturn 'Formation is covered by surflcial deposits throughout the enti:e site. Five outcrops of bedrock were found during this investiga-tion' one outcrop was obserued in the back portion of Tract c of !iighland Meadows' another beron the existlng cur-de-sac of vermont Road in the Figbland park,/Strearoside area. Rock qonsisted primariry of interbedd", ..,-.::^__l'"*"
exposed here
Jed sandstones, pebbly sandstones and conglcmerates. The rocks dip at t6 to 20 degrees towards the :rortheast"rrhich is consistent witb the regionar trend in this ::ea. ?he other three outcrops were found in the lowest parts of :re sire easterly of Streamside and consisted of mocieratel.y frac_:::eci ancj jointei sandstone and pebbJ-y sandstone. ALl strikes *era no:the3s: ai. tn northaesr dips ranging from 25 to 60 degrees.:tr-r.--e s:ee-Der i::s ar: ;eeerali-v consistent with regional dips of :-:i:ccr acrcss tite Gore Creek VaJ.iey. Di.ps are steeper rrri th the -ri -dorTii nant dip :oiuarcs the northwest. ?wo fauLts which offset :re .rt:i.l: urn gornation (but are cor :i..'e ceen mappe,c ", ;""":;.,::: ::"'ealed
bv surricial deposi ts)as underll.ing the siie. The change in at!itude :i i::e rocks is thus probably due tc faulting although they nay
,,:::-""t
iarge blocks of dis-olaced bedrock airhin ihe debris
o In rhe si.r: !ion, the;{inrr:rn
The cl:stic uni
generally brown
1!,;i:t 3rs:,.
;rlEs:,)::,is and
l t)o coo li i s t.:: ot i nierbedded sanCst :cnes, conqlcneraies,
sha I es, wi tn some interbeddeC l imes rcnes.ts (sandstones, siL !stones, and sha.i.es) are
ct> reddish in color, while the limestones are
The". nortberty,facing slopes on the sites and northerly dipping bedrock forio a dip srope condi.tion whi.ch is considered to be unfavorable for stability. Although the true dips of bedrock are, in sone cases, steeper than the sJ'cpes on-site, the apgarent dip (that componen. of dip neasured perpenciicuLar to the slope) are in solne cases shaiLower.
'.Ihe <iepth to bedrock will vary con-;:ieracieir over the site, depending on :hickness of surficial :ieposi:s' Bedrock will possibly be encountered at the toes of scne slopes ir the lo';er reaches of the properties or possicly ir ieep ::<cavaricns r ai ihough :hrcughout t::e ,najori ty of the si:e ::?.r, red:ocr wi. I I ;rocaol' cg deeper lhan 20 f eec and possi ciy ::: jsec as lC0 fee:. No bedrock r{ras enccuntereC rn any of the :._..i: .1cles dr iilec i;1 conJ u:iciion wi tn :his investigation -.'_:-;:cuqh :es: itoi -.i b!, ot.-'e:s .r3portedJ.y gncounterec bedrock at a j:-':: of 70 ieet cn Lct 22, vaii vlir-age i.isstr F.iirng 1,. at cJepths :::cr..-:g l:on o :o 5I .ieet in :he gig.rianrJ VeaCows Subdivision; and :::::p:j: o; i ieet i; the va11ey bottom whicir diuides .i: .:r 1..:.'ri !ar k anC ii igi.lLand :"leeiows.
. c i : ^ . ) : '-r.-.r:: I -- :
:i Sl:rlr. (r]cs):
An ancient Cecris sLide is:he sur_
i:.cial' deposi t vrhich unierries the roajoricy of ,Itighrand ileaco$s
tiiinc No' 2,:'-g6e southerry-pdrtion of Highland Meadows F,iring rro.
!i 'and "the southerly portlon of vall village west Filings No. -'r
:nd 2. This debris siide extends a few thousand feet upsrope to
:ne southeast. C. S. Robinson (i:r a letter to litr. David Elmore
:- :,':.:-l- Cicy Corpcrat.i.,n, dated llarch I1, 1.9?5) describes the
?:ccess oi fairures in the area. when the bedrock sropes were
:_.'::r-!rt ^rt
lf -"!'s-: '|?rL J-v . -. Strean erosion as a result cf the melting of the
';i- :ciers, the bedrock sloges f ai led end f ormed landsl_ ides. These
"-ir:?e !ailures did nor nappen alr at one time nor at one prace.
'lre ci-ift wourd faii by |-he undercutting of a sandstone red-oe by
j s::3an- rn sussecuent years the share sJ.ope above the sand-
i:::':e would cecome seiuraied and fail forming a nudilow out
.:-' j r.r3 ti,:-1 Dre'ricus lancisl,i.de- The erosion of the toe of a
' rrc:liie wouid reactivate part of an old landslide. These
\:','q iai::C ioc;lli'nany tines as Gore Creek has continued
i:fce iis :hannei. The res,uLt is a depost: that ranges in
i:r l : <:..ess cver the cedrock of a f ew f eet to more ti:an roo f eet
':i': rnici ccnsis-'s cf brocks and bourders oi the nore resistant
:;:: -'...: ,ii::s in a siI--;r, sandy and locally clayey mat!ix. SLope
' ri'-.iirl :: 3cnt:::uinE in garts of the area, and wilI continue
::ll+.':s 3p+,t:, ai. ef f or:s are maie co s..acilize the area.,,
-Ya:er:als cf the decris slide de:o-
cris ln :he roac! sys:en. tor the
':ois: -: :s ci si I r_y ani sand,,, clays
_ _:_
I I
s I opes
o c3i:J:;ring smail to Iar9.: iinoufits of angular.jraveL and rock tc
',t:)izr size, :nd consists mainly of materiais develcped from the
]i:i:'Jrn Fornation. The :ebris siide deposits contain sc3ttered
iirin to thick zones or nalerials which classify as clayey, siltyr
:ri gravelly sands. T'hese <ieposi.t.s can be describeci as an uncon-
sci:'-lated heterogeneous mi xture of soil and rock, wi th no strati-
:icaticn or structure. ,scattered slip plains are probably pre-
seni,rithin these deposits.
portions of the <iebris sliie
r::eriai- have been reacr-i i/ated in the recent past. Reactivation
:::s :cgarently been causeci both by natural factors and by the
:,':::-:: of nan. Thts i s e.,riCenced by t,he very receni slumps in
:.:::',' :oaicuts; t:re Landslide which occurred in March oi this year
ln !/aii village west, Filing 1, Lot 22; other possible slunps or
siices which have been mapged on the site; and by "spring line
sc3rps" presen! in and to the east of Highland Meadows. It is
3:cc:11e that ihe debris sli.de is not active'in mass", but that
:.:'-:ii;iot be deternineci under ihe scope of this investigation.
r:':^.:,lorai ne (Qn):
Morai.ne deposi:s of glacial andlor
;:3cr::lJv1a1 or i.;in 3re infer:ed to underl ie L!:e westerly part
ra t:?hiand tleacioas, Fili:rg 2 ano a srgniEicen: are3 of ilighland
i-:aic';s, Fiiing J- arci ilignlend Park, ?hese ;e:os!:s are lhe case
t:. r.':-.1: t:le :-,err =ce-Like :cpography, p:evicusly napped by other
:'.:t:::s, l':as been iorne<i. The moraine depos j.:s consis: of an
:rcc:.sciiiar-ei rni:<:ure oi clsy, sil:, sand ani gravei (io boulder
-.:-
size) ' i'iosr "f ;" gravels and cobbl". "r"?orounded ro rounded
--.ut 3!-a fii.(ec irith scme suoan-ou1ar fragments ir the fine grainel
r3:: i:(. I ns?.-:.-_ i. cns of tl-.e road cur-s ancl e.\posures aI.:ng wi:h
;ire data ga"-i:er:i in che i?st hores indicates that most of the
up:oer surface of tne mora!..re has been modifieci and covered by
geolcaical'ly more recent surficial deposits including randsrides,
colluvium, srogewash, organic clays, and possible sorifluction
deposits' scaitered rennants of noraine are probabry present on
ot:1er portions of the site as evidenced by local stegs and
3€nches' The moraine rests on a bedrock surfece above the pre-
sen: ele?ation of Gore Creek as indicated in two expcsures. In
i::e exposure on Lot 1 of Highland i.teadows, S.iL ing 2, the bedrcck./
roraine contact is separated by dispraced becrock fragnents of
:e:ris slide or colLuviun.
::::.lca D e pos: :s (et):
Two different Levels of river
:er;ace deposi:s are present i.n the siie area. The nos: recent
::rr3ce is:he sands, graveis and cobbles, ,,rhic:: a:e presentl:/
::::r-c ceposi iec and erccei in the f rooi glain cf Gore creek.
l:': se:cnc i=';el :s :--err3ce depos: ts lccated abcve r,he pirys io-
:-::;i':ic f )-oocpi:ir, adjacent '-o the Gcre Creek dr.:inage. These
:--':csi:s 3an :e :cund in tire S!reanside subii,,rision and in por_
::i:s oi vaii ;iilace :{esr_, li1in9 tto. ?. Thes? :err3ces were
::::s::ed 5-v Gcre creek at :ines riuri:rg i-l:e geoiogic past, the
-.: ,::r:s: :errace :eing the oidest. TTpicalIy, these deposi !s con_
:: j'- ci ,-:n cc r: s r): : C a t ei , crr:del,z strati.lied ri.x,.ures of cIay,
- c-
*.€{*
_-.d,.
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I'{to bo,rlJe i sLze). rrr"?ur. char:e:er-
io -Doc:i:; ;ori:,j, ccni3ir h i j h 1 .,' r; 3 ; : : c L :
: aIi the 9ra':r:i par-.icIes show scne degree
.i ii u'r i ai lan Delcos i :s (Qaf ) :
.\lluvia.i f an deposi ts can be f ounci
::<::::i:ng I rcrn :re :ilcuths o: ihe larg9r drainageways on the suF
;ec: si:es. The largest of tbese deposits are located in the
s:ieanside subciivision and the northerl.y portion of vail vilrage
:r'esi ! an<i 2. T!:ese degosits.resulted frcm depcsiticn at ihe
-3-.lths of the larger drainageways, and characteristically consist
cf non t.o crudely stiatified mixtures of clay, siLt, sand and
Er:vei. Since :hey are the degosits which formed from the
.:::!ring oi '-he basi;rs in the area, these deposits consist of a
::.t:-::e of vi::'-:al-ly' :iI the ot:ter rock ani soil uni t.s expcsed
,v:.:rte thei: drainay-e casi.n. Typically these deposits are uncon-
::-i:::--eo, c:o:lv so:ted, ari ccntain gr.avel io bouLrier sized
pa:: i cies ,,r;,:r varyirg deg r ees of rounC:ress.
,lcl-iu,ri'rn ani Siope i.Jash Deposiis (Qc-Qsw) :
Deposiis of cciluvium ani siopewash
:ai,'e: ::le :tlalcr ! --! ci i{ighI.rnC !4eado,nrs an,l !lig::1:nC park, and
--:-:::';el'.- --:i;: ::pa.;::s o: sLoce';:sr cc.'3r ii'le ter race l:vei j.:t
.:. "r:: '/i-.l:9* iles:, lilirg l zrea. Coil-uvium ani sloperv:sh
:l::,jr:eis are i:-cos: --ed oy ::le ac'.i t)os of sheetr,rash, _oravi.'..y,
shallohr sl unpin
o
9a
mass wasting of the steeper slopes to the south of the site. por
the most part, these materials appear to be derived from
weatbering 0f tbe Minturn Formatron, with sone naterlals con_
sistirg of both Minturn derived nateriars and arruvium or
moraine. These deposits are sinilar in character to the debris siide deposits' and consist of an unconsoridated nixture of soil
and rock' r-n the areas donlnated by poor subsurface drainage
conditions, these soils are rdet to saturated. .IncJ.uded with the
slopewash deposlts are layers of organic clay (encountered rn
Test Boles No. I and 2) apparcntly t eposlted ln pre_exlsting
Cepressions and/or spring areas.
The older deposits
are covered with these Iayered nlxtures of the
nost cases, the coarser sLopewash deposits and
ce distinguished from debris slide materials.
Landslide Deposits (els):
A f ew landslide <ieposi.ts have been
napped on the site. The larger of these deposits exists in the
northeast portion of .he Highland Meadows on the steep srope
which descends to the streanside subdlvision. The other most
significant randslide exists in the area of the cur-de-sae for
vermont court in Highiand park. The presence of the randsliiie
: 'rat'Jres indicates trai some readj ustnent of surf icia). cepo.si ts
ri:r addition to the debris slide) is also currently taking place,
or has taken plaee in the recent geologie past. Very recent
o
nd landsllding as the result of erosion and
such as noraine
naterials. In
colluviun cannot
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;novemenr ir ",ria..!d by rhe relatively ,r""n?"rps ar
of the slide above StrearnsiCe. The northerly linits of
vertnont Court landslide could not be deternined at this
the hea<i
tbe
llne due to road and building constructlon.
-.Scveral othei Cmaller landslidee .and possible slides have al.so .becn nap;rd- lhc ,naJorfty of these features appear to exlst on Eoderate to eery ateep 510pes, and
appear to have resurted fro a conblnation of undercutting or
o'ersteepening of the s10pe by Gore creek and/or by saturation of
the sl.pe by springs and seepage. rn the .area of the ,sride at
Ternon! court in ttighland Park, it appears that this.fcature is a :esult of saturation of naterilts on noderate to gentle slopes.
In addition ro these landslide areas napped, the presence of
smalr scarps in other areas of the subdivisions (see ceorogic
Irag) indicates that other areas of possible snall srulps and sli_
ces exist- The many guestioned features are a result of tbe fact that placernent of utilities and construction of road and filrs
have obriterated or disturbed pre-existing natural features and
vegetation
Sciif Luction (esoJ.):
A few possible solitluetion zones
r3'7e seen napped on-si. te- These occur i.n the exirene wes Eerly
pcriion oi Hi.ghland !,teadows, FiIing llo. 2, i:r Highlard Meadows;
:rd !liq:rJ.:ni park. So1 ifluction is a form cf soil creep and can
l€ 'j*1sc!:'oed as the process of slow flowage frorn higlrer tc lor.rer
'jround of masses of soir saturated .,ri th -"nater. possi cre
- LZ-
oo Bolifluction has-occurred as the result of the
colluvial and slopewasb naterials land possibly
springs. As has been indicated in all previous
--lulnerous springs, seeps and pet areas are found
saturation of
noraine) by
i nves ti gati ons,
on site. ry}
Ifluction
chen (tn 1g72) uapped an area in the reglon of Lot g of
319h1and Meadows, rlllng no. 2t ds being characterized by ,active
spring sapping"' This area could arso be napped as possibre
sorifluction- ?he lnssible solifruction zone which extends down ircm Meadowbrook Driue degenerates into a landsllde at the break ;.r slope above Streanside. The possible solifluction area
extending from Aighland Meadowsr Filing No. 2, Lot g, ls charac-ierized by a distinct head scarp, active spring, a distinctive
bulge in the slope as sbohrn by a topographic nap and a conspi_
csous grove of aspen in the down slope area.
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Recent A1lu,riun (eal ):
Recent alluvium can be
ialor drainageway which cisects Eightand Meadows.
consist of a mixture of sand, si1t, clay and gravel
teing deposited and eroded in the st,ream channel.
Recent S1'.rmps (ess) :
found in the
These deposits
currentl,y
Several recent slumps have been
For the most part, these slumps occu! in Ehe road
napoed on- s i. te.
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PPE ars for the cftc.s of Highland !{eadows, piling lto. 2. It a
p3rt that these slurnps have resulted fron the saturation (by
surface seepage) of ihe material.s exposed in the road cur-s
(debris slide materials). Only the larger or nore significant
srumps in the
'righland ueadows, Frrrng 2 area have been napped.
It shouid be noted that nost of the road cuts rithin the nlghland
ueado'irs' pir-ing No. 2 subdivislon are characterized by rrrl ero-
sion, sheet erosi.on, srnall slunps, and/or thin .skin_t1per
f ai. lures, and were either too srnall or too 'umerous to nap.
The snall slunp mapped in Lot 1 of
iighland Meadows, Filing tto. 2 at Gore Creek consists of both
serrere gully erosion and snarl .slunpin-o as the result of erosion
ai'!i saturation of slope inaterials f rom the surf ace drainage. Two
ciSer recent slurnps were napped in a northeastarry gortion of
Sighrand Meadows, riring tto- r, in the landsride deposit which is
lcc:ted northerly of vernont Road above the streamside subdivision-
lre ncrtner]-y of these two slumps has occurred uphill from a
gabion wall constructed as part of the developrnent of streamside.
Ir apoears that ilris slunp occurred prior to construc:ion of the
waLl bur- may havs 0ccurred when the cut for the wal} was nade.
The other sl';inp is rocated near the head scarp of the landsride,
:rnere muci has slumped and f l-owed down s10pe. wirh the exception
ci :n: possi5re area easterr.y of Tract B, no recogni zable recent
slumps were noted within the Highland Meacows or irighrand park
road cuts- rt shourd be noted, bowever, that rnost of the cuEs.
'/i:hin;lighJ.anc Meadows are lower and/or laid back at a shailcwer
angl _. r-han those in Highland lleadows, ?iLing 2. The cuts asso_
'::':::d 'ri th the real.i.gnment of roads in iiigh).and park had not
mo6t
sub-
,-4.
- t4-
-d
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Seen completed "On. rirne of thi.s invesarn"t.,, and tberefore,
,:ould not be observed.
Observatlons of the cut slopes along
-\Iprne Drive and Sierra trail in Vall village t{est, piling l,
indicat'es that nost of these slopes ara very steep but nost arc
not as deep (hieh) as the oneg ln Etghland lte.dot a, ptltng 2.
The cuts are characterized by rocal srnall sl'nping and erosion
which has resulted in the undercutting of the vegetation nat
ehich cap the cuts- seepage in the area of the cut,s was noted to
be ninor at the tine of sroge lnspection (g-3-g2) i but condltions
in tire spring of the year may dlffer.
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IgOLOGTC HAZARDS!
The most significant geologic
.azards which affect the site are (l) the presence of unstEbl.e rild potentiarly unstable slopes (incruding napped randslides.),
.2) 'the'-presence =of -'area6 characterrzed by Poor subsurface drain_
':age'and (3) .areas 'of posslblc present or past soltfluctron. othEr hazaris uhich affecr the srte lnclude variabre soir condrtions
iincruding expansive soirs and soirs prone to settlenent or con_
=clidation), the potential for debris flows, and earthguake
ha zards.
siope s:abilityr
Three najor factors .result in the
prasence of unstable slopes and potentially unstable sl0pes in ii:e subdivision areas. These are (1) topographic setl-ing, (2,)
;::oio_oj.c setting, and (3) surf ace and groundwater condi tions.
Topographically, the subdivisions
ar-- dor-ninated by moderate to steep to 10ca1iy very steep sl0pes
rvSich-are a part of dominantly northwest facing sl0pes of a large
::jge. Areas of nore gentl_e topography can be found in the
'-'"rlheasc pcriion of the site area (i:1 vail virrage -,iest, Firings
-:nd 2),' a10ng Gore creek at various points; and in the area of
Jigni.:n,j i,{eadows aaci !ii.ghlano pari<.
Geologically, virtually the whol.e
:its is un<ierj.ain b1z relatively thick unconsoridated surficiat
deposi!s af varicus types. :{csE of these deposits contai.n a
i::bsra:'!ti'a1 amount of clay.:ni sir.: size part:cres:viili:: them.
- 15-
o
sth Sioge stabillr,y I
naterials (along with
strength of bedrock.
area is also ln a dip
abIy.
us controlled by the strength of these
noisture, slope, etc. ) rather than by tbe
ft should be noted that bedrock in the site
.slope condltlon and thua orlcnted unf,avor_
I {t
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?he slte is located on a northerly
facing slope- North facrng sropes accunurate very rarge snow
packs' evaporation is ress than on southfacing sropes and thus
'ore accumulated moisture is retained in tbe subsurface. poot
subsurface drainage conditions result, for the nost, part, in (and
from) nunerous springs and seeps on the slte. These springs and
seeDs, al0ng with water which percorates doern through the soil as
a result of precipitation and snownelt, decrease the sl.pe stabi_
lity by saturating the subsurface soils. The presence of .he
possible solifluction zones indicate that even the gentler sl0pes
cen becone unstable if saturated.
our interpretation of the geologlc
lazards present. on-site can be found on the Geol0gic Eazards Map
(i.r pocket). This map is based on a review of previous studies
cn ihe sites, and our additionar field investigation and rnapping.
{azarc designations as shown on the Georogic Hazards Map are
iiscussed j.n a later section of this report.
Suos ur f ace D r ai nage:
t:re si:e can
sur f ace and
Subsurface drainage condi tions :n
ce divided into two broad categories. the first is
subsurface f 1ow associated wi:x Gore Creek and its
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tributaries.
ci ated hri th
High groundlrater tables and areas of subsurfa.ce seepage can be anticipated as the result of the water table associated witb Gore creek, and with possibre perched.warer tables and subsurf,ace seepage associated wlth the two nain trlbu_taries which enter the sites. fn th.e case of core Creek, high groundrrater conditions can be anticipated in those areas underlain by the rower revels of the terrace deposits along Gore creek' rn addition, those areas of alluvial fan deposits adja_cent to Gore Creek can aLso be expected to have high groundwater tables as the result of the.same condition.
Those areas napped as alluvial fan deposits (eaf) rnight also be expected to contain local or seaso_nal shallow groundrater tables and local areas of subsurface seepage fron surface and subsurface flow fron the major tribu_taries and upslope springs.
By far the nost critlcal condition in terns of s.ubsurface seepage on the slte is the poor subsurface drainage conditions which exist as the result of the nunerous springs and seeps' ?hroughout the hillside area of the sub-divisions, nunerous seeps, springs and wet areas were noted Curing this investigation and 13r re been the subject of nuch discussion in previous reports, letters and field reporEs.
The seeps and springs in the area are erratic. This is the result of the wide range in character_istics of the soiL materials and their permeabilities. Seepage forrows *re "pat.'r of r-east resistance'which in these types of
On" second is surface
springs and seeps.
"n,, t"urf ace flows €rsso-
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o iegosit.s is not usually predictable because of their non_si':atified nature' The amount of and r.ocation of seepage at a
'articurar time of year or during a year is ar.so controrled by many variabre factors whicb vary from year to yea; and seasoD to
s ea50n.
f n the extrene resterly portion oE \J. .ll,the Eigbland Meadows, Filing No. 2, and the eastern part of
,:.N.ly
iiighland Meadows' Firing No. r area, rt appears that the najoria"
*\
cE rhe seeps and springs originate near the topographic break on Nationar' Forest property and in the southern and eastern part of this area (as recognized in previous lnvestigatlons). Another area of rather intense past and preseni spring activity is lccated northerly of vermont Road in the regions of Lots No. 2L,'22 and 23 (Highland Meadows) at the landslide scarp and bench.
Areas characterized by poor subsur_face drainage conditions, wet areas and seeps and springs are shown cn the Subsurface Drainage Map. This is a conpilation of da:a ard spring rocations based on our investigation and previous reports and data available to us. fn actuality, the entire site area can be characterized as possessing poor subsurface drainage ccnditions' rt apPears that some of the areas presentr_y exhi-biting seeps and wet conditions were either not recognized in previcus i:lvestigaLions or !r,ere not present. As deveioguent of tite si.es has proceeded, more and more seeps, springs, and wet ireas irave been ancountered, or uncovered. It is iikely that. as inore rjeveloprnent occurs, adciitj.onal areas oi seeps, springs and Iret ar eas wi l1 be f ound.
-An interes ti :rg note !cr the ar 3a ::rccnpassing !lighianci pa:k is:5aE:his parti:ul_ar -:ar__:i_ lhe
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I -l ii.cge is charac..?r"o by an'israr.d'", ""o"?in an area otber-
wise dominated by evergreens, indicat,ing a probabte higher
ncl s t ur e Cond i ti on her e.
SoiLs Hazards:
Frm a solls englneerlng standpoint,
the site soirs possess variabre engineering propertres. Arthough
:irost soirs probably possess bearing capaeities hlgh enough to
support lightly l0aded structures, noderate to high loads nay
result in sone settlement or consolidation of the soils. Arees
cf rather low density htgh noisture content soils were found in
the test. borings (particularly Test Borings No. 2, 4, and 5).
under these conditions, even rigbtry loaded st,ructures tlay
:equire special foundation conslderatlons.
Since the najorily of the surficial
deposi.ts contain at.least some clay in significant guantities,
expansion of the clay soils courd also be considered as a poten-
iial. hazard in the subdivision area. Expansion pressures on the
order of 900 psf were measured for both soil types encountered in
the tesi borings. The basic soil conditions for individuar sites
should be taken into account during the individua] investigation
fcr the structures for each lot.
The logs oi Test ;lo1es and SoiI
Sumnrary sheets for the soils encountered are provided as pigures
5A and B and 6A and B.
-<
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Debrir f.lo,u=, O
Review of the Geologic-Rapid Mass :rlasting process Map (a conponent oi the cornprehensive plan, 30w:r cf Vail) indicati :s ;hat the two tri Jut,aries cf Gore, Creeic-"ahi,ci cr'o. s ="through'att'c'Si*rira:ne $eeo'.,mapped*f5''-A rthur .r . uear s i a 3 possessi.rg _.a, Dede,rate. debrts,.flodruzard. Tbis map described these hazards as "areas included rvithin this category can experience propert,y darnage, including flooding, erosi,on, inun_dation by roud, and impact by small boulders. ft i.s unlikely that life will be endangered in Lever r. areas except at the very erratic and infreguent intervals of unpredictabry rarge rockfari and debris avalanche events.o The debris flow hazard areas as indicateci on this map are shown on the Geologic Hazards Map accolnpanying this report.
Seisaric Risk:
The subject subdivisions are locateC apgroxinately six miles southwesterly of the Gore Fauft. This -rault is considered to be pctentiall!, aciive (R. M. Kirkhan and ;v" p' Rogers, 1981), and consist..s o.f a complex faur.t zone about 70 kilorneters icng and up tc about 4.g kilqneters wide. gecause of the proximiry of this potentiarly active fault in addition to :he 'ootentiai earthguake hazard in this region cf cororado, the srte is consi.lered tc be in Seismic Risk Zone 2. This should be :3ken into accouni during foundation and st,ability anal.ysis for :cnstruction in the subciivisions.
cr.oss.-through :
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ar"r""ra "^rG, o"=r.*orro*.,
?he geoJ.ogic bazardS pres,_,.1 : :.-.1_s: te have been categorized basec on geologic unit, topogrrphi._- sec:ii:g,and surface and subsurface drainage conditions. l,he hazarJs designatlons 33g shown on the Georogic Eazards Map (in .roc.<e:j.The following discussion wlll serve to desqrlbe these classifica_tions. For the eost part, these designattons mapped by previous investigations; however, an,"o..""*nd
:o those
::.T:;:,":":-ducted as part of this investigation. ft should be noted that the hazard areas and slope sta,billty characteristics are cased on theoretical analysis. site speclflc studies na,hazards are eiEher ress or sreare" .";;;; ;T.".1;":,,::.geoiogy, slope, noisture conditions, etc.gazard Area 7 _ physiographic FJ.oodplain: These areas lie within the phlrsiographic fl.oodplaia of the Gore creek Crainage and its tributaries. ft should O. ,roa",
lj:l;:j:ns G're
feaiures have obl iterated the pre_existing physiographic flooC_p1 a-i;r "vhich probabll" exi steci in thi s area. r t is our unders tand-lng ihat !'ederai Insurance -{dninj :he ..loo<!plai:: -r.irni., *;;r;"-r''rsrrarion
uaps exisr rhich show
Creek. the fLoodplaia limits on chese maps should oe checked in order to verify that buildin-os and iots are j_ocated outside the floodplain.
Hazard Area C _ Eazard -Area 5 generally consisls of.r:rs:abr e and metastabr-e sJ'opes in active groundrrater areas. Thi.:designation generally characterizes areas of very steep to steep sio'oes' acti ve seeps anc springs' accelerated ereep, rocal :rnar.1
o
pas r. novement.
.i"aqecti
*T
Hazard Area 5 - ?his area designation consists for .he
.-lost part cf metastable slopes. This area Cesigna::.on is gener_
n1ii" characterized by steep to very steep slopes and accererated crsep' Locar seeps are also present within Ehese areas. |sp
€Erdcti,on .in areas ,desi'gmated."aa gazatd Area 5 .wilt jreguire ter
very de'tailed and probably expensive geoteehnieal investiga..ibn,
a:rc probably very extensive rnitlgation. Depending on specific
construction and conditj.ons, development rna!, not be economicaL.
co'siruction pranned adjacent to the AEea 5 designation (both
rear the tops and toes of slopes) shouii evaluate the effect
ccns::uction will have on designation 5 area, and effect these
sioges will have on construction. rnvestigations for stability ?rl_l _rrobably involve of f _si te analysis.
*azard Area 4s - This area designation cons:sts of those :1.--':s:apged as possi:le active soiifi,rction zones. These arbas
-: : ::.:a.iac:--_.r i,zed cy probable high grcundwaier r 3r.!i ;rossicle slow .-::sier:tecj creep in the form of soii!L.-rction. Sioges in these .:e: !::nsr31iy sann.5rom gentle.,-o ncjer:r_-e. fn:hese er?3s,
i:Jmps, and/or
:o napped landslide deposits.
:ons:ruciion is J.i.kei.v to ce
i:.keiy to be guite extensiue.
.nd condi. tions, devaic5rm€n: nay
'.ions of the proper:y bordering
.construction should analyze the
slopes. Adeguate setbacks fron
This designation is nai;:ly linriteC
fnvestigation of these areas for
gui te expensi..re anci mitigat:Dn
DepenCing on specif !c cons:ruction
not be eecnomicai. On other por_
these areas, invest,igatlons for
effect of construction to these
these areas should be rnaintained-
tietailed geotech investigations wilL be necessary in order
to analyze groundwater and slope stability considerations a10ng
with Eoundation reconmencations. rn some cases, mitigation wilr
probabry be expensive, depending on site location in relation to
other hazarc zones, topographic setting, etc. rn extrene cases,
development nay not be economical. ilqvgs,tigaei-o.-l}:.1fo5 €tabillty
and groundwater condrtions wirr probably rnvorve off-eire anary-
si s.
gg.?i5d Area .e...d r-
o
nical
:fil'snroFattrffi*Hb*ecr6cb
'"i"9-9-g :.r-,-lg:-1],.^t9 ?pg. qna, €p
Esde.aare,qEr€epr$rr.ii.:dffiEEx€ifr.igf;'dercttrrbu,geut.iictdtc{115fiiiEdt1!a-
hi-pns*'|tEgLXiTb€ i..neceSliei'y-f:i:alofilaEt'fo .op3$z-e-groun41qtgri,-ccn_
<ii'tions and slope stabllt.ty' consl,derations along:,s1.gh foundatbn
reconrnendations. In sone cases, nit,lgation will be expensife
oecause of the height of cuts needed in order to provide access
and building areas, steepness of slope, and rateral ,pressures due
Eo creep. rnvestigations for stability nalr involve off_site ana_
lys i s.
Eazard Area 4 - This area designatlon consists of poten-
:iarly unsEabre slopes. These areas are generally characterized
cy'mooe-raCe slopesr possible creep, but appear to be fairly odry,
3i the present time. rt should be norec tha'., although areas
ei:nin this designaricn aDpear to be characte:ized cy 1ow
icls:'J:: conditions, excavations fcr access .er f ourcat!.cns may
snccunr.er subsu:face seepage. it is, tnerefore, vp_.y importent
l:'raJ-- ::raivi,Jual sit" ?ectechnica'l i.nvestigatr.cns be geriermed
-2 4-
;
I
lirior .o consar0or,, and rilar slope stauii:y and subsurface
irainage conditions be emphasiged in these investigations.
Hazard Area 3G _ This area designation consists nainly
of noderate to gentle slopes in active groundwater areas. these
areas are characlerized by active seeps and springs or possibre
sha110w groundwater tables, and/or possible past solifruction.
Detailed geotechnicar investigations are reconmended in order to
assess past or potential solifJ.uction, subsurface drainage ccn_
Cirions, foundation conditions and slope stability.
Eazard Area 3 - This area designatlon consists generally
cf gentle slopes characterized by apparent row noisrure condr.!ions_
?rese areas nay be subject to, local or seasonar groundwater seep_
p3ge. rndividual subsurface soirs investigations wl th enphasis
cn subsurface drainage, srope stability and foundation condltions
are recornmended in these areas. where the designation 3 area
a5uts against higher hazard areas, the effect of construction on
slcge stability should be analyzed.
gazard Area 3A - These areas consist generally of
moderate io gent:-e sropes, generaJ-ry above the permanent ground-
''.ter tabre of Gore creek. These areas nay be subjeci to 10ca1
o: seascnal grounciwater eabres and possicle fr_ooding or debris
flows' For the most part, these consist of the arluvial fans i;r
the stieansi.de area ar:d the northeasterly gortion of vail
'rrl-1ag-or Fi.'ings 1 and 2. subsurf ace soirs investigations a:a
!€commended f or these areas wi th an e:nphasi.s on f oundati,)n con-
citions ani subsurface drainage consirrerations. rf deep cuts ar.
?IanneC in these areas, they shoul.d be specifically analyzed for
s itbi:- i ty s; ret ai ned .
-25-
-!I
I i ,t
I H:ra;i
o
:
:
3e 2G - lSis alee d:signa..ion consis:s cf llet
:o gentte si.cpes in ac:iue groundwater ereas. T::ese a:ees aie
cbaracterizeC by variable soils conditions, and by a high per_
iEnen: nater table. Enphasls in these areaa ghould be dtrected
:owards subsu:face drainage conditions aed foundation qon.itioaE.
It shouid be nole<i that tbe bazerf
roun<iari.es, as delir:eated i:r thie report (and ct:ers) r d!3 gener-
aily drarn at approxinate breaks in sl0pe and that setbaeks for
cl're cuildings frorn hazard. zones shourd be based on Ebe prcposed
;onstruction and rndividual geotechnical anal.ysis, not "blanket'
setback distances
-7 e-
u*ss-qslE .rr,erones,
benched,
natural
.nc lop".t"o, if ptaced *itfinO
soirs on the sropes, novenenr ""J:";:p
zc,'e Ji
verrnont Road (Highland
Tf not properly placed
PoE€ntlally unstable.
fn the area of the cul_<ie-slc for park) a f ill of substantial heigh: r..ri s:r:.and conpaeted, this fil,l nighr also ce
SUBDIVISIoN EOUA"IoN
vail village wesr I .and 2:
fn the case of Vail Village t{est,Filings' No' r and 2' it is our understanding tbat these sub divisions r''ere platted prior to any reguiret'ents for georogical or soils reports, and tberefore, no previous geologlc hazards investigations have been acconplished for these tdo filings.
dighland Meadows, filing no. I:
The existing subdivision J.ayoutr €S it pertains to original georogicar studies and previously rnapped hazardous areas, appears to have been pJ.anned with due regard for site conditions recognized at those stages, at least to the satisfaction of the various consurEants and reviewing bodies.ucst consultants indicate in retters that at least the prelinri_:tary plat had taken into consideration kno,.,rn condi tions.
An area encornpassing portions of
L4, 15, 19 and 20 of Highland Meadows
Ac the tlme of the writing of thi,s reportr oost critical references h,ere available f
;.:;;;;""napped geologic hazards rras accotnpltshed. Based on our review cf tbe avairable references, al0ng wrth our field reconnaissance and
,.ra"a
of subdivision layouts, the followlng discussion is pre-
i.ci3'l :hrough g, 12, 13,
ilas apparentrlot pari of rhe _. O studv area in the C. S. Rocinson and Associates, report daced Novenber 2g, L977, but was part cf tire R. W. Thompson report of July, 1.973. fnspecti.on of thls 1973 study inciicates rhat porrions of the buirding areas for Lots 5, 7 and g lie within his i'igb Riskn zone ar.ihough in a letter to KKBNA dated Decenber 2, I9ZZ, Th
map furnisbed or
onpson indlcatest rThe ratest ur firn indicates substantial portlons of Lots .t througb 9, and 19 to 25 are restricted as open space. ?hese restrictions are within areas des our original inv
;crlbed as high hazard zones in estigation. We believe the open space as desig-nated on the plat should be maintained and building restristed fron these areas. i
Eigbland eadoes, I.iling Uo. 2:
f n Chen I s 1972 report r-.or Vail village west, Filing No. 3 (pigure lts) it sbows an area including Fortions or Lors 1 ihroush 5 (Eighland neadows,
";r;:;;::..r; "","potentia' slide Area'. This hazard area is also shorrn on the Sketch plan Submi ttal Map (Sheet ,g.1 ior Aightand ileadows, Filing No' 2; however' the boundary differs sonewhat between the two naps' chen's June 30' 1g7g' report was apparentry not accom-panied by a sinirar nEp, and therefore, it is not known frorn what ihe hazard ar3a on the Sketch plan Submittal is based. The sketch plan Submittal is dated May, I97g; Chen,s report on iiighland lteadows, piling No. 2 is dated June 30, 197g. To our kncrrledge' rhe prerininary plat does :rot derineate this hazard ar-oa on i. t. rn conclusion, i t appears thai portions of the
building
!i i ghl and
-Area".
these ro.?t"o."
Iie qiihin thjs
L thrcugh
"po:_.ntiai
"nttfe." for s:;ne of
Meadows, I,iling No. Z)
Matrerhorn Vitlac
i. s a;: erea ..r.l rdi-1g, ""
Area No. 4 F..." ;ffi.-='!i'.*^!Ero***"*.1Tj 32 as his
'#,:J::"t"ton""*iffi
ut *
".. ar e pr es en t i y ve r y
"
i-;;;T-"'.r-;*cr-#es a
ui al ,.,tr.','ah6F! ^- l.= co active collu_vi al movement or ,crcar.rr r r ",.-':-t*1;:*Solru-
-!-*.r.\-,r$.i.Er'+rne*&a,r,"*r**Titjll""t' ThesE areas boundary is shown on Ene sketch pian suUmiilaf for Highiand i{eadows, Filing No. 2 as 'Eazard Area". portlons of Ehe building enveiopes for Lots 17,18 and 19 1ie within this ngazErd A,scar. This hazard area is not cn the prelininary llan for this filing.
rn Eighland Meadorlsr Filing No. 2,the road systen is such that it is feasible that access courd be ob..ained f rom ei.ther the top or bottom of the locs. f n the case 'vi'tere high cut sropes exist on the 10t, this creaces trrctential lrroblens in that. if access is on the downhill (cut; side, con_siderable excavation wi.lL be needed in order to access the cuilding area. When accessing a lot from the top portion, it is "isualJ'y trre practice to construct a building on a cut and f ilr '=ad' By doing this, fill could possibly be praced cl0se to the iir slope which forms the downhill boundary of the lot. The s'jrcharge of f i.'r- sl0pes above cuts could have a detri:nental .5:ect on cut siope stability. rg..the case of more than one lot 'rr:-i1een -Lwo srreets, such "" s.t'r"n erpine ;.r;;;..."
".."*
.-
)r'.2* ald Vermoni Road/Gore Creek Drivg, t'n. ."".a.uction of cut
- 3I-
.l .l ,UV
:iopes ..ulj-.:1:.:_e .a .Ce:r"inenEa: ej iec: oa rhe uphitt ts:s and
:ons:r':ction of f ir-r- on the up-ri.,,-i rrts ccur.ii have de:r inen:.r1
a:f:cts on the iownhilL lols-
: ii!gnland park:
fhe aighfand park Subdivision is a
repiatofiIi9hlandMeadowSrLots26through42.Thisareaeas
cove:ed under the Thornpson, 1973 and Robinson, 1977 reports. The
:)reiiminary pran for Highland ueadows (incruding Lots 25 through
12) was apparentry reviewe<i by both Robinson and Thonpson and by ..he Colorado Geological Survgy. ?he generai conclusion in tbe
..crorado Geological surveyrs retter is: "Derrel0pnent of the
"''es:-uPPer neadow is feasible but like all mountain develolnents
qril-I need good construction supervision.,
To our knowledge, neitber Thonpson,
Scbinscr, nor ihe .cororado Geological survey have reviewed the
!rigirrand park subdivision p1ans. By overraying the rg77 Robinson :
' "rngineering Georogic crassification Mapr onto the sighland park
3racirg and Drainage plan (Revj.sed) da--ed.qpri1 27, rggi; and
.oior:iag ihe landslide area indicateC by Jerry Kiug and Associates
l.r his lecters of Novembgg 5, l9g0, the following conclusions can
ce dr awn.
r) Four pianned units (whi.cn have aiready been buirt)
i:: :vi !:rln Rcbinson's En-oineerirg Georo_oic crassif ication 5..
?-) porcions of three piaraed u:ri:s lie ritSir a land_
.:-::e area as identif ieC by je:rir Ki.lg anC -4,ssociaies.
4
-3?-
I
I
I
I
Cri ticat Areas
,l,llrr t,ltrrtt.tl lcltlr_rrt of cI lt tual proolerns and potentiar hazardous areas due to .construccion is conplicated by the fact that the type, size and nature of as yet unbuilt structures is unknown. Tiiere are also dlfficultles
involved in evaluating the effect of present construction because we have no idea who did the subsurface soils investigations for the individual buiiding sites, what they found, what they recon-mended' and if the dever.oper forl0wec lhe recon'endations.
!lighland Meadows, Filing No.,f3
?he first exanple of a potentially
bazardous area due to presen! construction is the area of Lot 2 of Eighland Meadows, Filing No. 2. This lot ls tn an area of possibre sorifluction. The northerly part of this rot is an area of metastable sl0pes- rn the area of Lots 4r and 42 0f the vail ViIlage West, I'i1ing No. 2, construction has created hiqh
retaining warls and high steep unretained cuts in this slo.oe.
The conbination of these factors resurts in a higher hazard potential for instabilities for construction on this lot.
Severe gully erosion was noted to be occurring at two maii points. In the Lot 1 area of Highland
Meadows, Filing No. 2 and in Lot 5 of Highland Meadows, Filing
llo' 2' rn Lot t, surface drainage is directed down a,Tetastable
siope and the saturation of the soils has created a gurry and
sJ-''mping' rr Lot 5, gurly erosion is occurring around the area
oi a man-hole arc sewer Erench excavalions and some mud is beinc
-33-
, ra:rhed Jown the .rC. conti:rued er3sion ", ,!, area could
cause sl.pe instabilities and/or deposirion o; the e:odec soils
:ouiC sccur in t.he house area inrnediatel.y bel_ow the srraLe.
rr'ai1 viilage lfese, eillng No. 1:
Another criSical problen area is the
i,ot 22 of Vail Village t{est, piling Wo. l. ft appears that niti_
::'-i on of the randsricie which has occurred on this rot will be
guite expensive. Depending on how nuch ooney courd be expended
:o saivage a buircabre .oortion of this lot, the rot nay have to
be abandoned for builciing purposes for the sake cf stabilizinc
the slope and road.
potenti.ally hazardous areas exist ,,rithin rhe unsrudied vail viffag#.iifing No. l. rn rhis suts
iivision, entire lots have been napped as being on netastabre
srcpes. These lots wirl reguire very detailed si.te evaruations
prior to construction, raitigation probably being guite expensive.
;ianiani park:
The area arcund Vermont Court
i::cluding portions of former Lots 27,29,29,30, 3I, 33 and 34
:s 3nc!--:'ler critical proclem area. In this area, Robinson
reccanized a ianoslice. subseguent i:lvestigations by Jerry Klu.g
irj.issoc!ates delineatai: sliie a!ea encciilpassing portions of
iot:; ?3, 30r,31, 33 and 34- A reconnaissance of Ehis area curing
.t:': :.:r-;esiigation aLcng with t!re excavations oi Test 3ori.ng No. t
,l
I
I
F
i
*I
I
I
t v
d
I li
.t
?
: l,i
ii t t
-F .i
:
i
I
J
I
I
-34-
ird!cates r-his lr5a :o f,e : larrisLiie. We woulC:onsi.,Je: :re
sliJe rnapped rr' ?ob:rson ani the sri..ie mapped by Kirg as :he sanne
:eature anci thus corr5i ned anC expelcei :he !,,ro sli5e a!:as. Tl:s
sride area is consicered to be ia cur:Jszard zone 5 anc nitiga-
tion of this f eature would probabJ.ir have .-o involve a combined
eifcri rtf ail lots invol.ved.
I t is sugges ted .rhai .the Bighland
Park subdivisicr:, plan be reviewed by the previous ccnsuitan.s and
ihe cororado ceol.gical survey for Eheir comnents on the proposed
develo5rment in this area.
Highland i{eadows:
fn the Streauside area, although not
a par: of this studies area, lt appears that previous investiga-
tions recomnended filrs in the area to buttress the randsride,
while present con-struction has undercut the toe in part. rt is
nqt krown whether rhe exi.sting gabion and retainirg wal1s in
these cuts were desig:red as buttresses. cutting of ihis toe
(rvitnoui recention) cculd have negative effects on stability of
t:ie l-ois in Highland jteadcws aborre this area.
?eg: cnal :
The most cri.tical area lies in the
fy e;t ?x::ensize subdra.i.n slrsten.
: !is ur f ace dr ai nage condi :i ons wh i ch
iror;er/er, can gr.3b1bi3 ce mi:igated or sucstanEially r_6duced
exi st on the sl:e.
tr6*
-35-
--'.) :'ighLand Headow=Staing No. z &.rzi! zi1lige;vesi, fi:i-.rg Ne. l:
The stab:Iity of cut slopes in
Highland Meadows, tiling No. 2 anC Vail Villagr.,rfes:, giling Nc.
r is also a critical area- As previousry drscussed, nany of the
cut slopes in trighland ileadows, pliing No. 2 ez:hibit s!.,rrnplng,
seepagc and erosl0n- these cuts rrill contlnue to Eail if not
sEabillzed. Tbe priaary nitigati,on technigue reconmenced for
this area is to instalr a subsurface drainage systeo rn order to
intercept the subsurface seepage. rt is posslbre that buttressing I
)r retention of sone of the cut slotrns will arso be regul:ed.
-d{.
- J 5-
I.IIT IG.tr^TICN
Many di.'ferent types of unccn-
solida:ed surficiai deposi ts underiie the site and varicus
problerns and cornbinations of problems affeci the site. As pre-
viousiy discusse<i, sl,rge stabiiit!' on Ehe site appears !c be
conrrolled by three maia factors, the t,opography, botlr surface
anci subsurf ace drainage, and the geologic un.i ts. Due to ttiese
many variable factors, the type of nitigation used on any par-
. 14.*,.\. !_,ticuLar site or problen area.aill depend on its si:e specific
characteristics. Depending on the-Ei'iF:n<f'"eilaeiit e -ha zar d,
+--d.,rdr.rii.rr.r*.rr€4 J lE ltlltt ! Itrt a Scint effort may have to be nade by tirc or nore lot owners in
orier co mitigate ihe hazar<i. and reduce the potential for insta-
5i li r-i es on thei r lots.
fn the case ef smal1 r-o mediuru sized
J-andslides, nitigation could involve rernoeal of the sLide debris
and replacements .,rrith conpacied f i11, drainage anj buttressing of
i;:e landsiide, or in the worsc of cases, conplete avoidance of
the hazard.
In the case of possible sol ifluctj.cn,
this can probabJ.y be at least slcwed tc an acceptable leze1 of
risk by a sys:em of drains which drain the wat,er frcm the deposit.
fn the case of 9u1J-y ercsion, sinple
i.nstaLLation of drainage structures l.lhich are non-erosive would
pr e,/ent .;uI ly ercs!on.
I:r the case cf the slumpinE obserued
:n:re rcad cu:s, : c:,ref ully planneC :nd designeC subsur.'ace anC
turface drainage s:/sten.rould be the €irst initigation measure for
these ar?as. In sone cf tbe cuts, st:5il-j.zation by but:iessi:tg
- 3 l-
or re tai ning
o
structures rna !.t
anount of tna::ltenance urhich
and -'ill ano sheet. erosi.,):t,
bern.: nay be necessary.
In reference to the possible novenent
o.f roEd f i.rrs, ni tigation courd incrude continuous mai;rtenance of
cracking, stabirization by sone sort of retaining structure, or
in the worst case, conplete renoval , stripping, keying, benching,
compaction, and drainage. one probren $ith the soLution of con_
tinued nraintenance and cracking is ilraE lf the fill noves to an
exient that it reaches a rdater or sener ri,ne, a simllar failure
could occur as has on the Bitetto property.
The prinary nitigation technigue
which should be investigated, pranned and desi,gned for the site
is a subdivision-wide drainage system. This point cannot be
emphasized enough- This drainage systen shourd be instalred
based on a detailed subsurface investigatlon and analysis of the
groundwater. conditions on-site, anarysis of the existing utili-
ties s?stems (some utilities couLc intercept subsurface seepage
' anci ir not designed to do so, eourd increase the problems), and
ca;efuI design.
Critical problen areas should be
i;rvestigated in nore detait as soon as possibre in orcer that
soLutions can be found to these problems.
We hope this has provided you with
the iifcr:nation reguired. rf you should have any guasticns or
:e.juire ad<iicionai clarification, please ieeJ. free tc contact
! i ncoln-Dei/cr 3.
also be reguired. Depending on the
can be tolerated due to skir faii.:res,
siough walLs or sj.ough catchment
-3A-
oo
i-=-: .\,._-il-x.. . .
: ' .'' ,/' ../' i
r _ . rt\l''T1;j.:-_:" _,.'_ 1g
-'-:*- ----7 ; ' .,. ; i r\-- -.,'-'-//
i ./ .. r',.' \::---- ''-----.- .---"--.--- i . i - ... .:.' ,/ _)-+.
._-__-. ,i \-r____*)JI-"__ -- i.'..--:.4kt'--.., ' ./,,,r,.r -- '-).,,', * *--.-- ,1' *.-. norfr::::. ' .- ,/ ''.,
" -..*.--=J ', t'' . .:-'r '-.,-.:7,^) ,--
-t"',', I \ /
--' rrrgl'o;; -;zd\]::, . :',, I :\ -i .rv"3-;\'aii.,./1(\l:,i:" ,..- _.
,_^,r , ,,,.",
' .1 -
-)+: ;
,'':1,. .---' : .: Z-jASI'=:''.- - -:--=::J"J--r!"'- -" -:;.--=.
.-'-
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F/4urc t
'ERal srrE LocATtoN DIAGRAIa jtaruo MADObts
iiT HOLE No'
I ELE'JATloN
HiJr.
bo:t9.rY.
s.67"
,r,GU4€ -<4
DRILLING LOGS
SzrtietD,
Ftat&t/t/t
64,2|t
o26e/r6,
5/t7ta./ral
, l.ttarttr
Ex?a/v'tls,
Et!&re
EoazoEe
DZ!4eo
AFTaZ I
uJe 784 ,4f /'.
ct) cla,,'J
g6t7r 62trE
t/./ t t aor/)
Pao'82x.
F 2/jr,
tnoFft
lxPa/rv/re
St.re ,
',4// Oett //
trEDe:t?rt
DEtaED 1'1 -et
4Fra2 c s
tvo t#rEA
c,!., cztf,
E 7* SCar'7.
6nnrgL5,
PlO -AP/.l. t
Cl ) 6... /,
'yrr,5e477 aPavE!5,
?ao -82Ar. t
.no ltrt
Ftalv,
/r4Ea. OEA't7r,
ExPeArtrlE,
'a.tt
Ut.
StxDtTott
FCt6.tE'{/5
8..cc( ctnl
,aF 7' E?i
Or?6ttV/C
ctt/,'a'!D/,
Srt?/, tNrrr,
.taer'r: 611
F/?/Yt,
*/attf 70
tY.tT
!i,
t.ftz
tt/.
:D 15
2.rz
l-lll C0l- N I ccuoarco: Gc'-caAoo sPRlrrGS.
DaVORf ! ausauo, 3L-arwooo.-s-ijllg:'i!:{rl E-r-siil:: is' I oarrc .irrf.c:tcN ,l'|o TaosE 'GECuoCrsts I fvcurxc: qccK s?Rl!!59 _-
HOLE NO'
ttEvlrtolt
61, ct.Y,
try,rri 5Aa7f.
6tar1L5-
,u*ror5T
ttn!61trrr,
SXPatStrt€
5e*ra
Fre/tEE
,Ut
SastE 'z/.
5e*rE
D 2r.-!1! D 7-2 :82.
6kae
'Vo .Jlrek
6t, cia) /,
rrtTt taafn
6rayE15,
t:atrr'le{/,t-
tlrtt, t aatt,
lrfrnt 7a
,tAY to,c?j
Zart OEttgrTl
€.ng
tt*af
6l , c.tf,
tJ. t€'rz
6PtrEzt,
Jnw)))tt'l,
,t n-tri
tttttat.ra
5t.,rc
y22' trrFF,
fraz atJtt r,
C ttt.
aroaaoeQ
Det.r-€o 7
AF'E' 8
Na drrez
;i
,,/E
ro
,t/a
nr?,
weTtt
,€ar,503r,
ue?
DertrTl .r/r.
?r:.i't,
'7--3L.
a
rcz, Arat.
+
I
I
;:,'4t22€
f t_L!i!G
<2 . ::ilcOLN I couoaroo'.cLcRroc spet 6s.
'| -J DeVORE I r'.leauo , 6LEHyooo spRri€s ,5 3gl a !! rx^a S i:9 . ! iRA!rD JUHcTioN .:roHif,os,:,r;:iLi3tStS I tyOyrl;C: 2DC ( SptidOS
DR LOGS
o
5Ui,vv'.At! SHE:;
ii'g i\lo. 7H-l Deplh t.Tt?t6t!
plc lrfo. z Ter r uy
Woier €cnrert ful 14,? 1,"i-:r€vi t) (Gr)
ll: i':rc i
51:,:cific
.1/E ANATYSIS:
eve lrl.:.7o Pcssi no
lo Ploce .--. !r:5i ',.. (f "l pcf
Pic:;i; l-jrnii ?,'-- /6,2
, fOO.O
,
1n ?6' 7
2" 943
-
9q-6
,DROMETER ANALYS15:
'rin size (mm)
,\.tC'i5tUii : D 5r.'Si7Y: ASTM TviETHOD
Opii r':'r-"':r r/rvistare Content - lo1o Q 4 clo
lvlo:<ir.ru,rn iYv Oecsiiy -ld--pcf
Cc i! iorn:: Secring Rctio (ov)-------J6
Sweii /- fr ays O-2f o/o
Swell cgcinst-86o psf Wo goin o/o
BETRtNG:
i-:ct':e i De:;g:roi::etei icv)--psf
l-lnccnfi ;,ei /icmi:ression (cu)
-ps
P !ote Be,:iing
inches Settlerneni
tl:cco r iict; cn
F ii i,t i,..3 il.ii'i :
%unctr
K (ct 2CrC)
'/o;i Roric
PPTN.
%
gaoe-___ee{__43.O
_ ?5.1
Ps
Psr
f/6uze 64
LI NCO L i.i-De r, Crl, E TiST! NG LASCRATORY
COLOR.ADC 5FRINGS, CCLORADO
solL AN.qt'i sls
SUMMARY SHEET
;l Sornll 1-C/. dta t/ - d26..ry/c /3znck)1-
.:.ii cn j&'6'vz ztO tvr€'ooot4t ,aAOln
}ing Nc rt-z CePth to'
iple Nc . 2
Notuiol Woter Ccntent (w) 23.2 o/o
Specific Groviiy (Gs)
Tesr Nc.
Tesi;ry P.f.
In Ploce Density (r") pcf
Plosiic Limit P.L- zo."o/o
IEVE ANALYSIS:
leve No .7o Possing
!4
YDROMETER ANAL'/5IS:
ioin s ize (mm)
Liquid Limir L. L^ 3a.t o/o
Plcsticify lndex P .1._!&L.oh
Shrinkoge Limit %
Flovr lndex-
Shrinkcae Rotio o/o
Voiumetric Chonge-96
Lineof Shrinkoge o/o
MOISTURE DENSITY: ASTM METHOD
Optimum Alcisture Contenf - woJQg"
lv'lcximum Dry Densiiy -zd+cf
Colifornio Beoring Rotio (ov)--96
Swell. / ' nayi 'o.zz
V"
Swell ogoinst3€9-psf Wo goin o/o
BEARING:
2!
_too.o l_ 99.7
96.7
8/.9
70.8
o/o
tO2OO 42.5
poJ Housel Penetro
Unccn fi neci Co
meter (ov)---csf
mpression (qu)-psf
psf
-/o unCer Psf
Plote 9eciing;
Inches Setrlement
Consoiidof ion
PERIr'EABILITY:
K (or
Void
lr|ca\
Rctio
5u I fctes PPM.
Ll NCC ti'l-;eiiCR i TESTI NG LASORATOP.Y
C3 LCA.ADO SP9!NGS, COLORADO
.a/€ L'Z€ /-t
SOII- ANALYSIS
}IIGHLAIIJ ..I,Aj)OI''S
CLCLOGIC }]AZA:'J] I{L?O?'TS
lloUC i'i-on: Deth 'v;hitC jer '
. i'Pril l' f936
Co.AtEY.
!IEMORANDUTTI
TO: Board of county Cquni.ssioners
FRoti!: Beth A. Wtrittier, Ea91e county Attorney
DATE: April 3, 1986
RE: Highland Meadoq^ts
Attached are copies of the geologic hazard reports
.egarding Highland Meadows which the Town of VaiI referred to
auiing the joint Town and County meeting held March 18, 1985-
BAW/af
cc: Susan Vaughn, Planning Director
Douqt Pilcher, Public works Director
,l
t o
Lrncoin DeVore
_100C ,'res I F,4rr,(_-f o Sr ,ij :;:.. _.r'r'd:n. cr,o.soo 3oso ;
f.::r)e Cli,:e
Claycomb Engi neer i ng
:]11aSe -Plaza, sui L; 207 GJ.enwood Springs, Colorado g160l
Atin: Mr. Etmer Claycomb
Augus: 16, l9B2
le:GEOLOGIC HAZARDS
SUBDI VIS ION
iIIGHLAND PARN
INVESTIGATION
EVALUATION
S UBDi VI S ION ,,ii:"liii^H^,ffi3;,.i?ii#j;l_:,
I,IEST VArL, COLORADO
Dear Mr. Claycomb:
;ii:i:ii#i;: 3;:'::fft ;l:,:;="u1..i .3t, a Georosic :,azarrs ii:.ehland Meedows a:9..:ishi;;; ;;;j;:j'ilrf;; $::tll'jnij'*,'/ai1 vi1'r'a9e west ririnj"^i";r;=;; in wesr vai1, cor.ora,ro..respectf ulIy submi tted,
Li\coLN-DeVoRE TEs?ING LAB., INc
l': .-:,
i i'-.: zr.'" "- '1nz nen -w;oc ..Jo. 4.1 709_GS
cc:
_-i.-T: - 6::ncj .l-uncii Dn LDTL - Gl-eni.:ood sp.ii9"
::; 1:::.t:Co arono -,.r_cr;o^ :,lr__:o
: ?C^r: j. ,7vai;nO
*lLttt 9f Tr"r,sroi rral Iu:*. of ConrenEs 'I'aote of tigures
TNTRODUCTION
GEOLOGTC SE"?rNG 6eorock
^. itinturn porxoation uurtrcial Deposi ts
- ueoris Slide Glacial Moraine Terrace Deposi ts
:1*yriaj_ Fan Deposits vt..,r r.uvlun & Slope WaSh 3:if;ii:: Deposits
Recent Alluviun :<ecent SLurnps
.JEOLOGiC ::AZARDS
:'t9.oe Stabilitv'
i::l_rr_i""e Dreinase 5olis 5az.:rds Debris r-lo,rs Seisnic Ri.sk
TABLE OF .CONTENTS
Deposi ts
Page
I]:oLoGIC HAZAR,DS DEs IGi{.qTroNs fiazard Aree 7 ;nzard Area 6 '?-azar,i Area 5
.-: c za id Area 4S .-iazard.4rea 4c :iaz;rd Area 4 ie zard Area 3G _i:zarC Area 3 iazerj Area 3A ,:azard irea 2G
J|iST.ABLA FILL SLOPES
-i:-'l i) i ;r s.-ctt iyA..i. uA Tr oN -:i:ic..:l .qreas
:'!iTiG.trTIOu
I
4
f,
4
7
7
8
9 l0
t0
1r
I2
t3
t3
Ib
16 't ';
ZU
)1
ZL
22
22
22
23
23
24
24
26
27
29
?t
37
,]
i:l ,i
Figure 1
Figure 2
Figure 3
.E igure 4
Pigures 5
Figures o
?ABLE OP PTGURES
- Site Location Diagram
- Geoiogic Map
- Geologic Hazards Uap
- Subsurface Drainage Map
A&B_DriLljngr,ogs
A e B - Soil Surnnary Sheets
(In pocket)
(in pocket)
(in pocket)
I
t
i j
I I
f li:?RODUC?f O
;t"rff fftisation "no "uJ
rollowine Presr
Ivest pilings f"' "'nntand i{eair
vision analysis
3nts results of a
the investigati
and 2' in t{est
:ws Filing No'
''
ot
"ttnrand Park'
geologic hazardr
itas to identif
1' col'orado'
't "nu vai'l' village
subdivisions aont
on the sites' tr"
n"otonic hazarThe
purpose of
general. soir con
atlbility with :
t"t'ew and addr
and potentiat
those areas whicj
tions on the ";n"
nuotogic sett'1""
tn" existing
:ecorn.nendations
i 'oossess subsurf;
ivisionsr
"no ttnn'
to identify
wi rhin this ."oo.'.o.
ni :i sa r" ro"".r'.lr""i ;Ji,t"J".. ":'' t"""":j:
aL so i ncI udeci
| ""t gathered from r) reyiew
rnf orrnation incfur
;.re si." ."nr"tj:t ,:'-'u.u'ew
of pubrished ,.r.". "o in this report
:igation" o, ,'n'
2) revigw of Previous;;"ture r'rhich covers
:ance and ,-ooll ":-0"." "'o*",ojr"i::" ; Tc
and soirs inves-
iie e:{cauation
9 of the sire seolon"'""0'nj";:tt"ntt reconnais-
of high ar.titudof
six exprorato'totont
and geologic bazards' 4)
analysis. rr," I aerial on"t"n'"Jnj:"""i"t;'rr.t' interpretation
tie period of
",tt"to
mapping for this "aro;'r".Eerpretation
and
:;;;:",^:"j:.j,; :i.;;t"jil,:: ;, :';;:' ,"'nou.."o
,..,-
:el-erences
"no ,."t
of wrjting thi
tion were drirrer
test holes
i ) .,,u.g" .""oro-n'',",o:^t"-,""ru
.""rr"0." 1:j'""T'.";# it J'ii,
?r fto. 2. - yrng ti:e sketch I ;l *;lil;fi;: # ;;#;":o"",r, jr:::";",':,",.j l:nn.""o
,",eado's
: ,''ji; l,x i, :*j,tt "= s:ff ';.r: ll'.''","';.1; :' :!?i o r va i i,
i : ::: i! i" r L i ti; j i;, : i:iff ,, ll L j l;: :
iijff t* 1,' ;,
: ,;::"i,J";:"i:'i;:]:*i.,;3ii';iphv showirs''a i,
.j ; : : o r,,,no rn appe j oo t "oi t J ;r'o i'r ; ::t. f
"".t
"' *3
Jotri i. L j " "n
!'i.::: or 'rho mapped. --"'.,r. rncervals. *o Oii.*Oi".n ',
-., ..,i l'*';:l
i
; "gf J ::i :ii
""1' oi T;:"., : ".1: ;"*, Iil I,-- ,, ...;;...::_9"orgel_of H.iehLand Mei . ..)c\:.:son and :. :,?:,:i;:i -<i.. i;:i:iiiii:rffl'ado'lvs, n-/2s777, by chari_s
, ,,
. ,:,:!,ili; *"*i:JjtJ ;r";ftiIa, 'u" vilrase '.des,.
; : :*j'riiL;";, :i f f "ii; :;l t*lii'*m . ii*:i i;i i:".,: ..-:..n .l ,.-t pruoatember 16, i;;6 ;. Nov,_,nber .l - . ...erirunJ-
,,.., =,";;.:;;:i':,ii:ir,i5.'::;::;::I i;;
=of,.-ln..,i, i,?,j; vai r,
. jl. '. t:.,]133tgi-';;iii:' Meadows bv crr, ?hompson rnc. .
:. : ::': _
so j ls rn,",";i;;, j;;:""l:il - -' qrr.,
. . -" ]. rL-: 'v:1L ."or a
-"Jii,lil':,:jop-osed Parkins Lor :-:n9 No. r. i',","11:1'tni--,'Lor 24, vaii ;i.,-.,::9 1:,nn *o. r. !v-iiiJ"iljfl;".tl.r"rjl. y:i iiii""i."
'.....:sr-i -^.-.-
vere lestrng tab., ria.
I,', ij'i,ff*iii*11#ti1'.iil ;:Ji{;it:;;;; ; ;:
',',', i,::ilii: i";4, ;i:jl$;nXiiio,ii;'ii;n',"i'.'l' u"'.
T.+ i,
j ffi { lji*,".ru:fri: lT;i* r"jt:;;
;i:;, j; ::ji;;jj::;i:l$:; 3i;:=i,;;:.;; -6";;:;i.:i
;.';'::; :.:.i;';:;:';.i:l:: ;ss, -igiidEes Georosrcal
;;:, ; jui ;::"-i,il'or;;;"i3";'il"ij,l".o:_ (a componenL or
'li=,aaa., "^,.
vQiL' sourcg, Arthur J.ii tr..'":':r soii A
i ii:;,,: : ;
t;,
::, . ::
:""" l" i ;; "'?" I " ; " ;;' ;;ii ::'
"
: "i"'ff ::i:",I 1..,:.1.,'.ur,,sucsurface Jnvesticatj
l-i i;:' r,: ;,, Ji"';:: i:: : y ;llii{.i; il i;' tiS, I'ii.", in' " ;' ;','i':' 1,.i :.' ?:c::,1,i:':t,. v,//24,/74. --"' srrrn$ Z b!
{.',,|;-'-:'', :llii."-.';;gl eers, ric.
-. !;:.-.'l::i :.;r13;' 2, i)'i)ti.''' resardins Metterhorn
*,,:',- : : 1., ,;;:;:ri^3f..:;.'" :4atrer
. :' '- '. ;':n':i.,.r; 31i-'1i1""i-':;;!951 villase subd j vision',,,, ;, :..,lii;j ";:g,:ffiilili"ruiiiiil;;i;;1l r::t,
i. r'r,ur';rs tj. suminerlee, 37L)rr75.
,;.
j:
-?-
'l
ItiEl,tORANDUll
To: Board of County Cqrulissioners
FRoM: Bettt A. t{hittier, Eagle county Attorney
DATE: april 3, 1986
R.E: Highland Meadolds
Attached are coPies of the geologic hazard reports
fegarding Highland Meadows which the Town of Vail referred to
duiing the joint. Town and county meeting held March 18, 1986.
BAw/af
cc: Susan Vaughn, Planning Director
Doug Pilcher, Publj-c works Director
c
Lrn6sin pslzgrs
rC00 )ve: i ;,,rr,,.-,a <.
'--_.'t: r.^- c^..^ -l ..-'
cbj, ilz.iid-j" L-''o'3co 3oeo;
!.1anra 3ii,;€
Augusr 1,6, l9B2
Atin: Mr. Elmer Claycomb
CLaycomb Enqi Viilege plaia
Glenwood Spri
nee r i ng , suite 207 n9s, Colorado gl6OL
GEOLOGIC T'AZARDS
SUBDI VIS ION
AIGHLAND P.ARK
Re:
TNVESTIGATION
EVALUA?ION
SUBDIVIS TON HIGIJLAND ]IIEADOWS
va i i" iiilia;;1;:,;,'F?:i Y::' ?,- :FILINGS 1&
WEST VArL, COLORADO
D,:: '- w --!sr .'rr. Ll-ayCOmb:
lle f ollc.ri rg pre I.'rr.,,-q!-i-5{-; ^i ----'s:"::. the. results of a
rair. virlase r{esriiri"di^i";n;=;:"1; ;:lt";"li; .r;riijo".Respecif ully submi. tted,
Li}]COLN-DEVORE TESTING LAB., INC
?e,ri.
i i.'-' z r .. ..., r.r.n/ O€i.)'- ;oo ..to. 4n7OB_cS
_-i:'T: - G:=xaj .,l-unctirn LDTL - GI enrvood Spr l;:9s
; l:i i : : :"_. 1 :? ;
1
J - ;,.j ui r J i ! r il " Ii ji, li, 1""..1 l ".9 i :".i :::, : :;;?i,;ii, y::0.:1::";i";i;;i;;; ;::j:;j'i?rf:: 3:,n]"nd^pirk,
-i:
a tC^,.1 ).. :/ 'aat;io
lg::"t of rransnirral
I".bJ" of Conrents ?abLe of F!gures
TNTRODUCTTON
GEOLOGTC SET"ING uedrock
^ -yinturn Fornation Surficial Deposi ts vsvr' Jis J_LLde Glaciaf uoraine I'errace Depos i ts
:1*y"rai Fan Deposits !t.lr.t_ uvl un & Slope l{ash :alg:lide oeposi rs S01 ifLuction Recent AlI uvi um :tecent Sl umps
..JEOLOGIC HAZARDS rrcge Stabilit,r
i:ilirj""e Drainase 5or.i. s Hazafds Debri s Flows 5eisnic Risk
TABLE OF CONTENTS
Depos i ts
Page
I
4
5
4
7
7
8
9
10
t0
ll
T2 l3
I3
to
15
20
2T
ZL
22
zz
22
23
23
24
1A
ZJ
4)
2-6
27
29
??
37
I]:CLCGI,: HAzARDs DEs IGN.qTroNs iia za r a' Area .l
l'azard Area 6 'iazard Area 5 jl.izard Area 4S Sazard -qrea 4c 3a zard Area 4 n-a:arrj -qrea 3G ::': ze r d _4rea 3 ::'azsrC Afea 3A ,-:a:ard Area 2G
.iisTAELE FILL SLOPES
i:-'.8 ) i;is ;c:,t r:./t.r-uATroN .:i:ic.ll .ireas
:,!iTIGATTON
a 4
I
T l
I
:l
'l
I
I
Figure I
Pigure 2
Figure 3
.trigure 4
Figures 5
Figures 6
@!E_Or.-tlsunes
- Site Location Diagran
- ceoiogic Map
- Geologic Hazards Uap
- Subsurface Drainage Uap
A&B_DrillingLogs
A & B - Soil Sumrnary Sheets
(in poqk.a,
(in pocket)
(in poq1.a,
I
Ii:3oo!:crro
;t"rff fftisation uno "uJ
rol towine Presr
west Firings ,t"' "'nntand rea.,'r
vision analysi"
tnt" results of a
Ehe investigati
and 2' in west
-rws Pi1in9 No'
''ot
"tnland Park'
geologic hazardr
n rtas to identifrail'
colorado'
't unu vair village
subdivisions
"on'
on the sites' t'"
n"otonic ha"ut-:n"
purpose of
general soir con
atlbility with
: review and addr
and potential
those areas whici
tions on the ";n"
nuotogic 5s1''1""
tn" existing
:ecornnendations
i ^oossess subsurf,
ivisions'
"no ttnt'
to identify
,ar thi n this,"oo,'.o.
mi ii sa re i den,;i';Ji.t"J"'.""t":::' ;;
aLso incl uded
| ,fnforrnation
inclu<I l.-'
eathered rrom r) review ;'::^::'.on
incLuded in rhis report I ths site regjon. ,,'_'Ewren
of published liter
:igarion" o, at'
2) review of previo"";;ature vhich covers
i.lnce
"no ,,'-oo',1,.^ ^1":' "'oo'"'o""i::" ;; l;..c
and soirs inves-
the e:<cavation
9 of the si te geoJ.onr'"no"n""oan;tt"ntt reconnais-
cf high ar.titudof
six exprorato,"otont
and geologic hazards, 4)
:naJ.ysis. rrr. i aerial ontttnt"'ln":""":"t;'rr.t' interpretatio":
r,re period
", ",tteld
maPping for this stuay"'r"':':tot"tation and
;;j;:".^:"j:.j,; ;"*":;,:: ;, :;;:' ,c-nduc,ed
rr.m
,;,,;l::": .".,l;.:: i:ii":j:i
j ff-- r#j ;;i l;,
;,' l':f:.acconpanyine rhe sketch
"-.t: "t":""ilfltne
maps'
i', i.t.t.t^.: repcrt :"
ouotDl ttElr HighLand lrteadows :,::-r:r .;il;; ;; ;;:ff..r0"",I'.,..3^o^oun Bi:etto. ?..: i . .ii;
iI i":j,T",:rt iriT ?ff ,;.i." l"'., " l; i; :, :( i;. ", v a i i,
.i ; ;; J i : :",!i " i71i r,2;
!; i J iI i Ji'. ii i" ;,,.?: :
; i, t ij"; ; j i
u
o,,
o n,
'.;
-2-
t
I
i
I
: :llfff#,jt#Jttu*r'fr.T+il,ir ry:,
:':' ;r;:p j i"+hij1
- "*3ro'l "iii;i;;:' r nc' resa : r i ;rs
; ;i+?q.i'#F'itrJ5;tt'"'i"',!;:' ffi ;;
r i, ;rtr #::ij:J$#:.Ti"rii.Ji:r:: : l;: :, T )ii ;r ".,, H i s h 1 a n d
3 4 ) ""iJ ;:::.;:j-li::i;"1.":,"iil .:'il\:;i'"J1io"" subdi vi si on
i;; li1?Ti#ii,titJffi ,',t,';,"+
"r l: ; ::' ;r
: : \ lil)|i M e a d' w s
r 7 )'
"
ii ;;: : ; t liti- ii' I
iii tii' ^'
l:":iii ;' ; ^J;' ;;
;f *i..'#ffi;{J#ii"ffi ;:_::,;'"
: i,, i tSiiji::i" i{tfi Jl i:}, itr r
:ff t;i,';:. :,*t: : ;: ;". i j$0,
" n j:, .,ffi:ft,il: ;;;;;';JJ',i'ii:li;:";;;,:'s;ffl;:-s:,:::ff;'
,, r g r,i.ii"r3.'; I "ii "o ljii",iiJj: ij i ;
" ;ooi,ll. r r, I e 8r ;
GEOLOGIC
The HighIand park, Highland irteadows and !'rest vail !'iling r' and 2 subdivisions are l.cated on the south side of Gore Creek in West Vail, Colorado (see 5,igure l).?he topooraphy on the three sites is ,rariable, with sropes and copograhpic features being the result of the various georo-eic l.rocesses in the region. rn aighrand Meadows Filing No. 2 and southerly portion of veiL Village l{est, Filing l, the topography is dominated by moderate to steeply sl0ping northfacing sropes,with Iocal shallower portions.rn the west part, a small area of iii-ohland lrteadows, Filing 2 contains gently to moderatery sl0ping 9round' This gentiy to moderately sicaing ground continues i.nto the FIighland i"leadows area, "rhere a portion of the eastern part contains simiLar gentle topography. ?o the south and erest,Sighiand Meadows and Highland park contain moderace to steeply ';10pirg ground wi th a rnain cjrainageway which bisecrs the si te..ilong .,-he nortreri -coriion cf ;iighiand Meadows Filing No. I and 2, along wirh poriions of Vail village i{esr Filings 1 and 2, is ';ery steeply sl0ping ground descending to the area of Gore creek erc i.rs tri,butaries.
rie dcrninated by noderate to
scucher!..u :Dar t, anci generailir
3;'lc ets:er-l_y ^cortions.
Vail viLlage West Iilings
steeply slcping ground in
genily sloping ground in
Land2
!L^irtte
the north
the site consists
Throughout t.he
been covered by
which will form
t!j
:he I.linturn
cri:-v of thi
i'iciel ie-oos
Bedrock underlying
Formetion of pennsylvanian Age.
s 3rea, the i,tinturn lor6ation itag
its, ivhich ar: the geologic units
:
I
I
the majority O .n. ,n'f^,r -, O :he material types that will. be encountered during construction. The rocation of the various geoJ.ogic units are shown on the Geologic Map (in pocket).
tsedroc k
-r_
I't i nt urn Fornation (pn):
A s previously nencioned, the Minturn !'ormation is covered by surficlal deposlts throughout the enti:e site. Five outcrops of bedrock were found during this investiga_tion. One outcrop rras observed in the back poriion of ?ract C of iiighland.yeadorrs, another below the exi.sting cul_de_sac of Vermont Road in the Eighland park,/strearoside area. Rocks exposed here consisted primarily of interbedded sandstones, pebbry sandstones and conglcmerates. The rocks dip at ld to 20 degrees towards the northeast, which is consistent with the regional rrend in this ':!ea' ?he other three outcrops were found in the rowest parts of cre site east-'rly of strearnside and consisted of mocieraEely frac_:ured and jointeci sandstone and pebbly sandstone. A1l. strikes .iere northeast ,,rj,th northwest dips ranging from 2g to 50 degrees.rh:-1S€ steeper dips are generally consistent with regional dips of cedrock across the Gore Creek Valiey. Dips are steeper rvith the predorilinant dip to*arcs the northwest. Two faults which offset :ne l,lj.nturn Formation (but are concealed [y surficial deposits)rave been mapperi as underlying the site. The change in attitude 'f ihe rocks is thus probably due to faulting although they nay ::'presert iarge brocks of displaced bedrock ,.ri thin the debris ;i. i,je.
rhe si,r?9ion, the ;.rinrurn Por:nation consists of interbedded sandstones, conglcnerates,siLtstones and shales, with some interbedded limestones.The cl_astic units (sandstones, siltstonesr dnd shaies) are generalLy brown to reddish in co1<
light gray.
rlr colorr whiLe the rinestones are
The northerly facing slopes on the sites and northerl,v dipping bedrock form a dip sl0pe condition rvhich is considered to be unfavorable for stability. Although the true dips of bedrock are, in sone cases, ste_6per than the sJ.opes on_site, the apparent dip (thac component of dip measured perr:enciicular to the slope) are in sone cases shar 1ower.
The ciepth to bedrock will vary con_srderabiey over the site, depending oa thickness of surficial ::'eposi Ls' Becirock ri11 possibly be encountered at the toes of scme slopes ie the rower reaches of the properties or possi cly in iie''3;; E'lq6eaticns, a1:hough !hrcughout tne najori ty of the si:e 'ir3e' becrock will probably be rSeeper than 20..eet and possicly -i:; ieep as ]00 fee:' No betrrock was encountered in any of the r-'st noies drilled in conjunction wi th this invesiigation aiihough test hor-e* by others reportedJ.y encountered bedrock at a '!t''prh of 70 ieet on Lct 22, vail village !{est, Fi.ling 1; at depths !:nglng f rorir 6 io 5l feet in the Highion,J Meadows Subdivision; and :; r Cepti: of 5 feet ia the valley botton which divides :liqhlenci park and Highland :.{eaious.
t t
i..
:iJ:f ^ci ai l)e:ros i:s
l).bris SLide (eds):
An ancient Cebris slide is the sur_
iicial deposit vrhich un,-.erl.ies the majoriiy of Highland Ileadows
iili'c No. 2, the southerry portion of Highrand Meadows Fi1in9 No.
\' and the southerry poriion of vail village i{est Filings No. 1
a;rd 2- This debris siide extends a few thousand feet upsrope to
:ne southeast. c. s. Robinson (in a letter to Mr. David Ernore
oi 7a'ir city corporation, dated March 11, 1975) describes ,-he
arocess of failures in the area. when the bedrock sl0pes were
j::cercut b:u "... strean erosion as a resulr of the meI:!.ng of the
';-J-:ci.ers, the bedrock sJ,o5:es f ai.red and f orrned landslides. These
:icoe failures did nor irappen all- at one time nor at one prace.
;l.re c1 i.ff would fail by the undercutting of a sandstone 1ed-oe by
: 3irean- rn suDsequent years the shale s).ope above t.he sanc-
::cne woulC cecome setu!aied and fail forming a mudilow out
r::rss rhe grevious LandsLide. The erosion of the toe of a
'':nislice woui-d reactivate part of an old randslide. These sropes
i:','e faited i.ocal1y nany tines as Gore Creek has continued to
::oie !ts channel. The resuLt is a deposi: that ranges in
:'rickness over the bedrock of a few feet to nore than 100 feet
:rc 'rriclr consists of blocks and boulders of the more resistant
:*d: :cx '.:ni is in a siI ty, sandy and locally clayey rnatri x. Slope
lril.:re:s contiluing in parts of the area, and wiII continue
;r:e.:s s:eci.ai. ef f or:s a:-e made to stacilize the area.,,
Vateriais cf the debris slide deco-
::rlr)s.,:d j.n nune:ous cuts i.n the road systen. lor the
:, :le Cerr:.; si:.le consis:s of siltv and sand.,, clavs
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ti
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'a t
ccntrining small to larEe amounts of angular Eravel and rock to
:ourder size, and consists mainly of materiars deveroped from the
)ti,-rturn Forrnation. The .iebris slide deposi ts contain scattered
ihin to thick zones of materials which classify as clayey, silty,
:ni gravelly sands. T'hese <ieposi ts can be descriced as an uncorr-
scliciated heterogeneous mixture of soil and rock, with no strati-
ficaticn or structure. Scattered slip plains are ^orobably pre-
sen t withi.n these deposits.
Por t i ons of the debr i s sI i <ie
na:eriaL have been reactivated in the recent past. Reactivation
.3s appa:ent1y been causeci both by natural eactors and by the
;'crks of nan. This is evidenced by the very recent slumps in
r:r',' :oai^uts- the Landslide which occurred in Itarch of this year
:n t.raii Village l{est, Filing L, Lot 22; other possible slumps or
siices which have been mapped on the site; and by "spring line
sc:rps" present in and to the east of Highland Meadows. ft is
-;robeble that the debris slide is not active "in mass", but that
:ouLC not be determined under ihe scope of this investigation.
Giaci.rI :'loraine (Qm) :
Morai ne deposi,-s of glacial and/or
giec!ofl-uvia1 origin are infer:ed to underLie the r.resterly part
')f iighland Meadows, Filitg 2 and a signific=nL area of aighland
li:aoor.rs, Filing )- anci;lighland Park. These;eposits arE the base
rr ',rnich the ierrace-1ike topograPhy, p:eviously napped by other
:ui.i:crs, 5as been f orined. The moraine deposi. ts consist of an
u;'rccnsciiiatec mixture of cLa]r, siLt, sand ancj gravei (to boulder
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size). Ittost of the gravels and cobbles are subrounded to rounded
cut are mixed with some subangular fra-onents ir the fine grained
natrix' rnspections of th.e road cuts and exposures al.ng with
ti:e data gathered in the i?st hores indicates that most of the
up:oer surface of the moraine has been modifie<i and covered by
geolcaically more recent surficiar deposiEs including randsrides,
colluvi"rm, s10pe*ash, organic crays, and possibre sor-ifruction
deposits. scattesed rennants of noraine are probabry present on
other portions of the site as evrdenced by 10ca1 steps and
'c':nches. rhe rnoraine. rests on a bedrock surf ace above the pre-
sent elevation of Gore creek as indicated in two expcsures. rn
tire exposure on Lot 1of Highrand i.teadows, Firing 2, the bedrcck./
noraine contact is separated by displaced bedrock fragments of
cerris slide or colluviuro.
T::. ace Depos i ts (e t ) :
Two different levels of river
ierrace deposi r-s are present in the siie area. The most recent
terrace is the sands, gravels 'and cobbles, which are presentry
be!n-o deposited and eroced in the flooc plaia cf Gore creek.
Tre seco;:d levei !s terrace deposi Es loca*,ed above the pirlzsio-
3rephic floodplain, adjacent to the Gore creek drainage. These
ieposi is can be f ound i.n tire strearnside sucdivision and in por-
i:.ns oi Vail Vitlage i{est, ?i1ing No. Z. These ierr3ces were
ce''csi' ted by Gore creek at tines <!uring tire geologic past, the
iiiitest :errace ceing ilre oldest. typicat ry. these deposits con-
sist of unconsoliCated, crudely strati,l ied nix'"ures of cIay,
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oo i:l:, sa::C a::C Eravel (tc boulCer sizej. They are character-
:.sticaliy ncde:r:eiy' to pocriy soried, eontain highly va:::bIe
rock types, and al-mosi all the gravel pariicles show so,le degree
cf roundness.
Ail uvi. ai Fan Deposi ts (eaf ) :
.\lluvial fan deposits can be founci
e:{bending from the nouths of the larger drainageways on the sub--
j 15^i- q; toq nhc f 6;gg5t of these deposi ts are locat.ed in tire
S:reamside Subdivision and the norlherly portion of Vail viilage
:r'est 1 and 2. These deposits.resulted frcm depcsiticn at, the
rcuths of the larger drainageways, and characteristically consist
cf non to crudely stratified mix#.ures of clay, silt, sand and
grsvei. Since they are the deposits which formed fron the
i:eining oi the basirs in the area, these deposiis consist of a
nix:ure of virtually all the other rock and soil units exposed
a.i-;hin their Crainage basin. Typically these deposits are uncon-
scl!.iated, pcorly sorted, and contain gravel io boulder sized
par'-icies with varying degrees of rounCness.
ioLluvi'.1n anC Sloge:'rash Deposits (Qc-Qsw):
oeposits of coiluvium and slopewash
ccver ibe na3crity of ilighland !.leadows and ilighland Park, and
-^t -!i.:ai', ir-i ^ ,raf,^si:S Oi SiOpewiS;t Cc;3f cire terrAce l_evel in -=L2lr r=-y :-.rrlI \i': vv.r r 4 \Jrvr=
fire r,tail viilage;{est, ?iiing 2 zra-a. ColLuvium anC slopetuash
r3-!er i als are Cepos: ted by the actions of sheet\.rash, gravi ty,
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sha110r, sl urnping and landsriding as the result of erosion and
mass wasting of the steeper slopes to Ehe south of the site. For
the most part, these nateriars appear to be derlved fron
weathering of th'e Minturn Forrnation, witb sone nateriars con-
sisting of both Minturn derived materiars and arluvium or
moraine- These deposlts are sinilar in character to the debris
siide deposits, and consist of an unconsolidated nixture of soil
and rock. rn the areas dominated by poor subsurface drainage
conditions, these soirs are wet to saturated. rncruded with the
slopewash deposits are layers of organic clay (encountered 1n
Test HoLes No. I and 2) apparently deposited in pre_existing
depressions and/or spring areas.
The older deposits
are covered with these layered mixtures of the
,'nos t cases, the coarser slopewash deposi ts and
be distinguished from debris slide naterials.
such as moraine
materials. In
colluviun cannot
tandslide Deposits (els):
A few landslide deposits have been
napped on the site. The larger of these deposits exrsts in the
northeast portion of the Highland Meadows on the steep s10pe
which descends to the Strearoslde subdivision. The other nost
significant landsride exists in the area of the cur-de-sac for
vernont court in Highiand park. The presence of the randsride
i'--atures indiqates that some readjustnent of surficlal ,Jepo.sits
i!:r addi tion to the debris sride) i.s arso currentry t,aking prace,
or has taken place in the recent geologic past. Very recent
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oo movement is evidenced by tbe relatively fresh scarps at the head
of the slide above StreamsiCe. The northerly linits of the
verlnont court randslide courd not be deternined at this tine due
to road and building construction.
Several other smaller landslides and possible slides have also been napped. -The najority of these
features appear to exist on moderate to very steep sropes, and
appear to have resulted fron a ccrnbination of undercutting or
oversteepening of the s10pe by Gore creek and/or by saturation of
ihe slope by springs and seepage. fn the area of the slide at
:/ermont court in ltighland park, it appears that this feature is a ;esult cf saturation of naterials on noderate to gentre sropes.
rn adiition to these landsr-ide areas mapped, the presence of
sna1l scarps in other areas of the subdivisrons (see ceorogic
)rap) indicates that other areas of possible srnall sr'rops and sli-
des exist- The nany guestioned features are a resurt of the fact
that placernent of utilities and construction of road and filrs
lave obliterated or disturbed pre-exrsting naturar features and
vegetation
scj. ifiucrion (esol_) :
A few ;rcssible soli,_.Iuction zones
'r:ve been napped on-si te. These occur !n the exirene westerJ_y
portion of Highland i,Ieadows, Filing llo. 2, in Highland Meadows;
:nd !:ighlanc park. sol ifluction is a forn cf soil creep and can
ae '.iescribed as the process of slow flowage from higher tc Lower
g(ound of rnasses of soir- saturated with water. possibre
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curred as the result of the saturatlon of solifluctlon ha
colluvial and slopewash rnaterials (and possibly noraine) by
springs' As has been indicated in ar.I previous investigations,
rumerous springs, seeps and wet areas are found on slte. Areas previousry nappe'c by Robinson and Thompson as tongue-shaped robes in an active groundwater zone are 10r were) possrbre solifluction
areas' chen (in 1972) napped an area in the region of Lot g of
3i9h1and Meadows, FiIing Ho. 2, as being charactertzed by ,active
spring sappingn. This area could also be roapped as possible
solifruction- the possibre sorifluction zone which extends down
ircm Meadowbrook Drive degenerates into a landslide at ..he break
in slope above Streanside. Tbe possible soli€luction area
e.rtending from Eighland Meadowsr Fifing No. 2, Lot g, is charac_
terized by a distinct head scarp, active spring, a distinctive
buLge in the slope as shown by a tolrcgraphic nap and a conspi-
cuous grove of aspen in the down slope area.
Recent Alluviwn (eal):
. Recent alluvium ean be
najor drainageway which bisects Eighland Meadows.
consist of a mixture of sand, siIt, clay and gravel
ceiag deposited and eroded in the strearn channel.
Recent Slunps (ess):
found in the
These deposits
curr ent!.y i
Several recent slurnps have been
For the nost part, these slunps occur in Ehe road napged on-site.
cuCs of Fighland
p3rt that these
oo
ueador.rs, Fillng No. 2- f t appears for the
slunps have resulted frorn the saturation (by
nost
sub-
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surface seepage) of the naterials exposed in the road cui_s
ldebris slide materials). only the larger or more significant
slunps in the Highrand Meadows, Filrng 2 area have been napped.
It slrould be noted that nost of the road cuts within the nrgbrand
Meado'ers I F iling No. 2 subdivision are ctraracteri zed by rirr ero-
sion, sheet erosion, small sJ.unps, and/or thin ,skin_typei
failures, and were either too snall or too rumerous to nap.
The small slunp mapped ln Lot I of
!:lghland Meadows, Filing No. 2 at Gore Creek consists of both
ssi/ere gurly erosion and srnaIl .slunpin_o as the resurt of erosion
arc saturation of sl0pe naterials from the surface drainage. Tlro
ot5er recent slu'nps were mapped in a northeasterly portion of
:{i.ghland Meadows, Filing Ho. I, in the landslide deposit which is
lccated northerly of vermont Road above the st.reanside subdivision.
The ncrtherly of these t.wo srurnps has occurred uphilr froro a
gabion wall const,ructed as part of the developnent of streanside.
It appears that this srump occurred prior to construction of the
wall but may have occurred when the cut for the warr was made.
The other slunp is rocated near the head scarp of the randslide,
:rhere mud has slumped and flowed down srope. with the exception
cf on: possiirre area easterly of Tract, B, no recognizable recent
slurnps ',rere noted within the ttigbrand Meadows or ilighland park
road cuts. rt shourd be noted, however, that, nost oi the cut,s
',ithin eighlanc Meadows are lovrer and/or raid back at a shailcwer
angle F-han those in Highrand lireado-vrs, FiLing 2. The cuts asso-
ciaied with the rearignment of roads in riighi.and park had not
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oo Seen conpleted at the tine of thi; investigation, and therefore,
,:ould not be observed.
Observatlons of Ehe cut slopes along
-{lpine Drive and sierra Trail in vail virlage l{est, Filing l,
indicates that most of these sropee are very steep bu! nost are
.ot as deep (high) as the ones Ln Elghland Meadowe, Flllng 2.
The cuts are characterized by rocar "r.r, sr'mping and erosion
r'ubich has resulted in the undercutting of the vegetation nat
which cap the cuts. seepage in the area of the culs h,as noted to
ce minor at tbe tine of slope inspection (g-3-g2); but conditions
i:r the spring of the year nay differ.
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IEOIOGIC HAZARD
The rnost significant geologic
razards which affect Ehe site are (1) the presence of unstable
and trrctentlalLy unstable slopes (including napped landsliCes),
:2) the presence of areas characterized by poor subsurface drain-
age and (3) areas of posslble present or past solifluction. other
razaris vhich affect the site include variable soir conditions
(iacruding expansive soirs and soils prone to settlenent or con-
sclidation), the potential for debris Erows, and earthquake
ha zards.
Si.ope S:abil i ty:
Three major factors result in the
presence of unstable sropes and potentlalry unstabre slopes in
ihe subdivision areas. These are (I) topographic setting, (2,)
geoiogic setting, and (3) surface and groundwater conditions.
rotrrcgraphically, the subdivisions
are dominated 6y moderate to steeg to 10ca11y very steep sropes
rhich are a part of dominantiy northwest ..acing sropes of a rarge
:ldge. -lreas of nore gentle topography can be found in the
;ortheast pcrtion of the site area (in VaiL Village west, Filings
I snd 2),' along Gore creek at various points; and in the area of
!iighi.nnd iiteadows anii ijighlan<i park.
Geologlcally, virtually the whol.e
3ite is underrain by rerativery thlck unconsolidated surficial
ceposi:s af varicus types. :4osE of these deposits contain a
s::bstantial amount of clay and silt size particles lvi.thi:.: thern.
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510pe stabillty ts thus controrled by the strength of these
naierials (along with moisture, slope, etc.) rather than by the
strength of bedrock. It should be noted that bedrock ln the site
area is also in a dip srope condition and thus oriented unfavor-
ably.
the site is located on a northerly
facing srope- North facing slopes accumurate very rarge snow
packs, evaporation is less than on southfacing sropes and thus
more accumurated moisture is retained in the subsurface. poor
subsurface drainage conditions resurt, for the nost part, in (and
fiom) numerous springs and seeps on the slte. These springs and
seeps, along with water which percolates down through the soil as
a result of precipitation and snowmelt, decrease the s10pe stabi-
lity by saturating the subsurface soils. The presence of the
possible sol.ifluction zones indicate that even the gentler slopes
cen become unstable if saturated.
Our interpretation of the geologlc
hazarcis present. on-site can be found on the Geologic Eazards Map
(ia pocket). this nap is based on a review of previous studies
on the sites, and our additional field lnvestigation and napping.
iazard designations as shown on the Geologic Hazards Map are
Ciscussed in a later section of this report.
Subsurf.ece Drainage:
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the site can be divided
surface and subs ur f ace
Subsurface drainage conditions an
into tvro broad categories. The first is
flow associated witt Gore Creek and its
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triburari.".Q,nu second 1s surf ace
"n,, ?0"urface flows €lsso_clated with springs and seeps.
Elgh groundhrater tables and areas of subsurface seepage can be anticipated as the resurt of the water table associated with Gore creek, and with possibre perched rrater tables and subsurface seepage associated wlth the two nain tribu_taries which enter the sites. In th.e case of Gore Creek, hlgh groundwater condiEions can be anticipated in those areas underlain by the l0wer revels of the terrace deposits a10ng Gore creek' rn addition, those areas of alluvial fan deposits adja-cent to Gore creek can also be expected to have high groundwater tables as the result of the.same condition.
Those areas napped as alluvial fan deposits (Qaf) rnight also be expected to contain rocal 0r seaso-nal sha110w groundwater tabres and 10ca1 areas of subsurface seepage froo surface and subsurface flow from the najor trlbu_taries and upslope springs.
By far the nost critical condition in terms of s.ubsurface seepage on the site is the poor subsurface drainage conditions which exlst as the result of the n'nerous springs and seeps. Throughout lhe hillside area of the sub_divisions' nurnerous seepsr springs and wet areas were noted during this investigaEion and bave been the subject of nuch discussion in previous reports, letters and field reporEs.
?he seeps and springs in the area are erratic' This is the result of the wide range in character-istics of the soil rnaterials and their permeabilities. Seepage fo110ws tr:e "path of ieast resistancen which in these types of
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deposits is not usuarry predictabre because of their non-
stratified nature' The aroount of and rocation of seepage at a particular time of year or during a year is ar.so controrred by
nany variable factors which vary fron year to yea.- and season to
s eason.
rn the extreme westerly portion of fV' .l the Highland Meadons, Fillng No. 2r and the easte, 1)" W 'n parr of S!$Highland Meadows, Filing }{o. I atea, lt appears that the rnaJority of tbe seeps and springs originate near the topograpbic break on
National- Sorest proper.ty and in the southern and easrern part of this area (as recognlzed in previous investigations). Another
area of rather intense past and present spring activity is
lccated northerry of vermont Road in the regions of Lots No. 2r,
22 and 23 (Highland Meadows) at the landslide scarp and bench.
.qreas characteri zed by ;nor subsur_
face drainage conditions, wet areas and seeps and springs are
shown on the Subsurface Drainage Map. fhis id a compilation of
data and spring rocations based on our investigation and previous
reports and data avaiLable to us. fn actuality, the entire site
area can be characterized as possessing poor subsurface drainage
ccnditions' rt appears that some of the areas presentry exhi-
biting seeps and wet conditions were either not recognized in
previous ievestigations or were not present. As deveiopnent of
i;re sites has proceeded, more and more seeps, springs, and wet
sreas !:ave been encountered, or uncovered. rt is likely that.'as
inore rjevel_opment occurs, adciitionaL areas of seepsr springs and
net areas will be found.
An interesti;r9 note fcr the ar_oa
a;rcoinpassing'i{ighi-anci pa:k is that :hi.s parb,icur.ar :ar: ot the
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iidge is characr.?"u by an
wise dominated by evergreens,
rooisture condition here.
o 'islar.d" of aspen in an area other-
indicating a probable higher
Soils Hazards:
From a soils engineering standpoint,
t!:e site soils possess varlabre engineering propertles. Although
nost soils probabry possess bearing capacities hi.gh enough to
suDport lightly loaded structures, noderate to high roads may
result in so;ne settlement or consolidation of the soiLs. Areas
of rather low density btgh moisture content soils were found in
the test, borings (par-ticularly Test Borings No. 2, 4, and 5).
under these conditions, even lightly loaded structures may
require special foundation considerations.
Since tbe majority of the surficial
deposits contain at.least some clay in significant guantities,
:xpansion of the clay soils could also be considered as a poten-
tiaL bazard in the subdivision area. Expansion pressures on t,he
order of 900 psf were measured for both soil types encountered in
the test borings. The basic soir conditions for individuar sites
shourd be taken into account during the individual investigation
fcr the structures for each lot.
Sumrnary Sheets for the
3A and B and 6A and B.
The logs of Test ;toles and SoiI
soils encountered are .orovided as Figures
Debris etors, O
Review of the Geologic_Rapid Mass I,lasting process Map (a component of the conprehensiee plan, ?ohrn of r'/air) indicates ihat the two tri)utaries cf Gore creek ehica cross through the siles bave been mapped (bl, Arthur f. Uears) as possessing a moderate debrts flow hazard. ?his map described tbese hazards as oareas included within this category can experience propert,y danage, including fIooding, erosion, inun_dation by nudr Eod impact by sma1l bouLders. It is unlikely that life will be en<langered in tevel I areas except at the very erratic and infreguerit intervals of unpredictaSly rarge rockfali and debris avaLanche events. n ?he debris flow hazard areas as indicate<i on this map are shown on the Geologic itazar,ds lirap acconpanying this report.
Seismic Risk:
rhe subject subdivisions are loqated approxinrately.six niles soutbwesEerly of the Gore FauIt. This r-ault is considered to be pctentially active (R. l,{. Kirkhan and ;r" p' Rogers, 1gg1), and consists oi a conprex faurt zone about 70 kilometers iong and up t,o about 4.g kiloneters wide. Because of the proximity of this potentially active faurt in addition to :ne potentiar earthguake hazard in this region of co10rado, the site is considered tc be ia Seismic Risk Zone 2. This sbould be tlken into account during foundation and stability anarysis for ccnstruction in the sub<iivisions.
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The geologic hazards p!€scr.1 i :.r_sj. te have been categorized based on geologic unite topographic secci.-and surface and subsurface drainage conditions. ?he hazaris designations are shown on the Georogic Hazards Hap (i,r -foc(e:i.fhe following discussion rlill serve to descrlbe these classifica-tions. For the nost partr these designatlons correspond !o those mapped by previous investigations; however, they have been nodi_fied based on the aciditional geologic napping and analysis con_ducted as part of this investigation. ft should be noted that the hazard areas and sl.pe stabillty characteristlcs ars Sased cn theoreticar analysis. site specific studies rnay concrude :ra:hazards are eiiher less or'greater depending on site speci,fic geoiogy, sIope, rnoisture conditions, ete.
Ilazard Area 7 _ fhysiographic Floodplain: These areas 1ie within the physiograpbic f]oodplair of the core creek crainage and its tributaries' rt shour-d be noted that al.ng core Creek consj.derable construction has occurred, and rnan-made features bave obliterated the pre-existing physiographic frood-plaia which probably existeo_ in this area. ft is our understand_i'g that Federal rnsurance -Administration rtaps exist which show lhe
"l00dp1ain limits a10ng core creek. The fl00dpraia r-irnits on these naps should be checked in order to verify that buildings and lots are Located outside the floodplain.
Hazard Area 5 - Eazard Arsa 5 generally,consists of
GECLOGTC HAfps pEsiGNATTONS:
:::::::.:nd
merastabie sJ.c-oes in active sroundwater areas. rhi.s designation generally characterize
..rsqD' t'ni
tiona< 5^r:.-^
_.rgrqvLgf lzes areas of very steep to steep siopes, acti ve seeps and spslngs, accelerated creep, locaL snaLl
i:umps, anA/or o
pas t novement. This designaiion is nai;rly limited
:o na-oped landslide deposits. rnvestigation of these areas for
const'ruction is r'ike1y to be gu'te expensi.re anci rnitigation
iikeiy to be guite extensive. Depeniiirg on specific cons:ructi.on
a;:d condicions, deveioproent may not be eccnonicai. .on ot:ler por_
"ions of the Properiy bordering these areas, ihvestigations for
construction shourd anaryze the effect of construction to these
s10pes- Adeguate setbacks from these areas should be maintained.
investigations for stability will probabry invorve off-site ana-
il,rsis.
Hazard Area 5 _ fhis area designation consists for the
ilost part of metastable slopes. This area Cesignai:on.is gener_
:liir characterized by steep to very steep sropes and accelerated
cr3ep. Local seeps are also present sithin these areas. Con-
s:ruction in areas designated as Hazard Area 5 wilr reguire a
ver;'r detaired and probably expensive geotechnical investi.gation,
anc probably very extensive mitigation. Dependin-o on speeific
construction and conditions, devel0pment rnay not be economical.
construction planned adjacent to the Area 5 designation (both
::eer the tops and toes of s10pes) shourc evaluate the effect
construction will have on designation 5 area, and effect these
sJ.opes will have on construction. fnves!igations for sEability
'rj.il" ?robably involve off-site analysis.
Hazard -\rea 4s - This area designaiion cons:sts of those
ii?as rapped as possicle active soiifiuction zones. These arbas
::-::i'taracierized oy probable high grcundwater, ani possicl_e slo,rr
::.ic:ej-eraieci creep in the form of soiifluction. Siopes in these
:iias.._:eneraiiy range Irom gentle !o mcder:i.e. Tn :_,1:ese er?as,
o
cie !a j.l- ed geotechni cal investigations r.ri1l be necessary in order
to analyze groundwater and slope stabirity considerations arong
with foundation recoiornencations. rn some cases, mitigation will
probabry be expensiver deipending on site locatlon in relation to
other hazarc zones, topographi; se..ting, etc. rn extrene cases,
developrnent may not be economical. rnvestigations for stabil-ity
and grounderater conditions wilt probabry involve off-site analy-
si s.
Itazard Area 4G - This area designation consists gener_
ally of potent!.ally unstabre slopes in active groundlrater aEeas.
This area designation is characterized by noderate to steep
siopes, local seeps and springs, recent but snall slunping, and/ot
nroderate creep. rn tbese areas, detailed geotechnical int'estiga-
tions wilr be necessary in order to analyze groundrater con-
iltions and slope stability considerations a1on9 with foundation
reconnendations. rn some cases, rnit,igation rvi1l be expensive
because of the height of cuts needed in order to provide access
end building areas, steepness of slope, and rateral .pressures due
to creep. rnvestigations for stability nay involve off-site ana-
+_y-r>.
Hazard Area 4 - This area designation consists of .coten-
tially unstable slopes. These areas are generally characterized
by mocie.rate slopes, possible creep, but appear to be fairly "dry"
at the present tine. ft should be noleC that. although areas
',ri r-hin this designaticn appear to be character i zed cy Low
,Toisture conditions, excavations fcr access.ar founiations nay
3ncounter subsu:face seepage. fi is, tberefore, very inportant
that irciivi,JuaL site gectechnical investigaticns be gerfcrrned
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iiricr to construction, anc that slope siabii.ity and subsurface
drainage conditions be ernphasized in t,bese investigations.
Haaard Area 3G - This area designation consists mainly
of noderate to gentre s]opes in active groundwater areas. These
areas are characterized by active seeps and springs or possibre
shalLow groundwater tables, and/or possibre past sorifr.uction.
Detailed geotechnical investigations are reconmended in order to
assess past or potential solifluction, subsurface drainage ccn-
Cj.tions, foundation conditions and slope stability.
lrazard Area 3 - This area designation consists generalLy
c! gentle slopes characterized by apparent 1ow moisture condirions.
?hese areas nay be subject to, rocar or seasonar groundwater seep-
p39e. rndividual subsurface soirs investigations with ernSrhasis
cn subsurface drainage, slope stability and foundation conditions
ale reconmended in these areas. where the designation 3 area
alruts against higher hazard areas, the effect of construction on
sioge stability should be analyzed.
Hazard Area 3A - These areas consist generally of
moderate to gentle slopes, generaiJ-y above the perrnanent, ground-
,ater t.able of Gore creek. These areas nay be subjeci to local
or seasonal groundwater tables aria possible fiooding or debris
flows. For the nost part, these consist of the arLuvial fans i:r
the stieamside area and the northeasterly portion of vail
''irlage, r'iiings 1 and 2. subsurface soils investlgations a:e
reeommended for these areas with an ernphasis on foundation con-
ditions an.l subsurface drainage consirJerations. rf deep cuts are
Planned in these area6, they should be specifically analyzed for
stebiliEy or retained.
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' llazari Ar3e 2C - ?::is e!:ee Cesignaiio. consisgs cf fl.at
io gentre siopes in active groundwater areaE. lhesa a:eas are
charact,erized by'variable solls condltlons, and by a high per-
'?enent lrater tabre. Enphasis in these areas should be directed
icwards subsu:face drainage conditions and foundation cond:tions.
It should be noted that t!:e hazeri
aoundaries, as delineated ir this report (and ot:ers), ar= gener-
aJ-J.y drarn at approxinate breaks in sl0pe and that setbacks for
lbe buildings fron hazard zones shoutd be based on the prolrcsed
construction and indifiidual geotechnical ana!.ysis, not,blanket"
setback distances.
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Another hazard whlch affects the site is that of potentiall.y unstable fiII slopes. Areas that
;;,*;1,..f nch.r^r: ^- -? ..fnspection of the roadways und n.u in which longituciinal cracking (cracking paraLlel I P6s obsertro,r ,nL- -
sY'rr'|r'Y Pcrarrer to the roadrvay)was observed' Tbe mosr obvlous area in which ; ;.;;r;;;""'obserued is in the hairpin loop of Arpine Drrve rn nighranu IJX lleadows, Fi1ing No. .2. In this area, it appears tbat tbe road fill is either settllng and/or novlng down the hillside. Another area of significant cracking is l0cated on the northerly side of Lhe roadway near the cul_de-sac of Seguoia Drive. Numerous other areas of l0ngitudinar cracking were arso noted a10ng the roadway of nighland ueadows, Filing ye. 2t and in vail Village i{est,Filings r' rhis rongitudinal cracking rrould indicate either (1)that soil rnateriars in utility trenches are posslbry settring, or (2) fill stopes created as a part of roar, construction are either settling or creeping downslope. Unless the fil.l.s were properly placed (with proper stripping, keying, benching and compaction),:he fill sl0pes shourd be considered as potentiarly unstabre. rt is possicle that these fills i{ere not .oroperly compacted and/or iie on an unscarified surface of old topsoil and uegetati,on, and thus the fill wedges are prone to creep, slumping and settlenent.3ui1d up of subsurface drainage behind the firts (excess ;"
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presure) or saturation of the fills by se:page would arso reduce lhe stability of these fill rvedges. Even if ihe fiLls were keyed,
bencbed,
"na O"p""t"o, if placed O within the creep zone Ji natural sojls on the slopes, novenent could occur.
vernont Road (Bighland
ff not properly placed
PoEentially unstable.
fn the area of the cul_<ie-sac for Park) a filt of substantial height rxisrs.and eonpacted, thts ftll inighr also ce
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suBDrvrsroN UATTON
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EVA.L
At the time of the writing of this reportr most criticar references were available for our review.Review of the subdivislonrs layouts in regards to prevl0usry napped geologlc hazards rras accomplished. Based on our review cf the available references, a10ng with our field reconnaissance and
;a"a
of subdivision layouts, the forrowing discussion is pre-
Vail Village Wesr I .and 2:
rn the case of vail village west,!'ilings' No' l and 2, it is'our understanding that these sub-divisions were platted prior to any reguireraents for geol0gicar or soils reports, and therefore, no previous geologic hazards investigations have been accoraplished for these t,*ro filings.
dighland Meadows, Fi1in9 No. l:
?he existing subdivision layout, as it pertains to original georogical studies and previousry mapped hazardous areas, appears to have been planned with due regard for site conditions recognized at those stages, at least to the satisfaction of the various consultants and reviewing bodies.uost consu'r'tants indicate in retters that at least the prelimi_irary plat had taken into consideration known conditions.
An area encompassing portions of Lots L through g, 12, 13, 14, 15, 19 an,J 20 of Highland Meadows
oo
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pari or the srud!' area in rhe c. s. Robinson report dated November 2g, Lg77, but was part of the R. W. Thompson report of July, 1973. fnspection of Lhls L973 study indicates that portions of the building areas for Lots 5, 7 and g lie within his "High Risk'zone a-r.though in a retter to i(RBNA dated December 2, rg77, Thonpson indicatesr "?he .latest map .furnished our firn indicates substantial portions of Lots 4 through 9r and 19 to 25 are restricted as open space. These restrictions are within areas descrlbed as hrgh hazard zones in our original investigation- !{e berieve tbe open space as desig-nated on the plat should be naintained and building restricted fron these areas-,
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Eighland Mead,ows, Filing No. 2z
fn Chents Ig72 report for Vail vilrage west' Filing No- 3 (Figure 1B) it shows an area rncruding portions of Lots 1 through 5 (Eighland lteadowsr Filing No. 2) as "potential sride Area'. This hazard area is al so sbourn on the Sketch plan Submittal uap (Sheet 4) for Highland Meadows, Filing No' 2; however' the boundary differs sornewhat betrveen the two meps. Chen's June 30, L97g, report was appalently not accom_panied by a sini133 i'dpr and rhqssf66q, it rs not knorr,n from what the hazard area on the Sketch plan Subnittal is based. The sketch Plan submittal is dated May, IgTgi chen,s report. on iJighland lteadorrs, Flling pq. 2 is dated June 30, 1979. To our knc'eledger the prelininary plat does not delineate this hazard area on it. fn conclusion, it appears that portions of the
building ".rlpu" for s:ine of rhese rot?t,,ors I thrcugh 5,ilighland Meadows, I,iling Uo. Z) lie ui:hin t Area, "t r'I'r= ltl:nin this "potential Sj.:.de
f n .suinrnerlee, s 1974 report for Matterhorn Village Subdivisionr !.iiiog No. Z, it shcws an erea
i::l _:]nnn"r.r"ns
of rots 15, L6, 17,18, re, 20 and 32 as his ("...a very high risk of slope rnovenent associated with any construction cuts and firls.") and Area No. 5 (,These areas are presently very steep and unstable due to active collu_viar movenent or 'creepr.'). These areas boundary is shown on ' the sketch plan submittal for ilighiand ,i[eadows, Filing No. 2 as ,Elazard Area,. porlions of the builriing enveiopes for Lots lZ,18 and 19 1ie within ihls nuazard Area,. This hazard area is not cn the prelininary plan for this filing.
fn Eigbland Meadowsr Filing No. Z,the road systen is such that it is feasible that access could be obt,ained from either tbe top or bottom of tbe 1ots. fn the case :rhere high cut slopes exlst on the lot, this creaces potentlal _oroblens in that if access is on the downhill (cut) side, con_siderable excavation will be needed in order to access the building area. When accessing a lot from the top portion, it is usually the practice to construct a buir.ding on a cut and fill pad' By doing rhis, fill could possrbry be placed c10se to the :ut slope which forns the downhill boundary of the lot. The surcharge of filr sropes above cuts courd have a detrinental effect on cut siope stability. rn Ehe case of rnore ar"; ;;. r".ueireen iwo streets, such as between Alpine Drive/Gore Creek Jrire a:rd Vermont Roacl/Gore Creek Drive, Ehe construction of cut
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5':.opes ccur-d have a de:rimenta.r. ei iect on the uphirr l.rE,s and
rons:rr:ction of fii-r on the up.rill rots couiii have detrireenial
affects on the downhill 1ois.
liignlano' 9ar k:
fhe Aighfand park Subdivision is a
rePlat cf Aighland Meadows, Lots 26 Ehrough 42. This area was
covered under the Thompson, 1973 and Robinson, 1977 reports. The
Preiininary plan for ttighland Meadows (including Lots 25 through
42) !'as apparently reviewed by both Robinson and Thonpson and by
the CoLorado Geologi.cal Survgy. The generai conclusion in Ehe
Jol0rado GeoJ'ogical surveyr s letter is: nDetrel.pneni of the
Ires:-uppe!:neadow is feasible but like all mountain devel0snents
..ri11 need good construction supervision. n
To our knowledger Deither Thonpson,
Icbinson, nor the .cororado Georogical survey have reviewed the
I{ighrand park subdivision plans. By overlaying the r977 Robinson
"Engineering Georogic classification Mapr onto the aighland park
Gra,ii::9 and Drainage plan (Revised) rJated..priI 22, Iggi; and
^cioi:!ng ihe landslide area indiba*-ed by Jerry Kiug and Associat.es
in his ietters of November 5, 19g0, the forlowing concrusions can
be Crawn.
I) Four planned units (whicir have already been built)
iie rvi ihi.n Robinson's Engineering Geologic classification 5..
2) porE,ions of three planned units rie witSin a r_and-
;ilie area as identified by .jerr:, Kl.rg and Associaies.
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Cri tical Areas
Ttrrr l,lerrl"tf lc,rtlun o( crltlcal
problerns and potentiar hazardous areas due to constructl0n is
complicated by the fact that the type, size and nature of aa yet
unbuiLt structures is unknown. Tiiere are also difficultles
involved in evaluating the effect of present construction because
we have no idea who did the subsurface soils investigations for
the individual bui'lding sites, what they found, what they recon-
mended, and if the deveroper forl0wed the recommendations.
Highland Meadows, Filing No.,!g
The f irst exarnple of a trrctentia1ly
hazardous area due to present construction is the area of Lot 2
of Eighland Meadowsr Filing No. 2. this lot is in an area of
possible solifLuction. The northerly part of this lot ls an area
of netastable sropes. rn Ehe area of tots 4l and 42 oE tbe Vail
v111age west, Fillng wo. 2, construction bas created high
retaining walls and high steep unretained cuts in this slope.
The combination of these factors resurts in a higher hazard
potential for instabirrties for construction on this rot.
Sevele gully erosion was noted to be
occurring at two main 5rcints. rn the Lot I area of Highland
Meadows, !'iling No. 2 and in tot 5 0f gighland Meadows, Filing
No. 2. rn Lot 1, surface drainage is directed down a rnetastabre
slope and the saturation of the soils has created a gully and
sLunping. rn tot 5. gully erosion is occurring around the area
of a man-hole and sewer trench excavations and some mud is beino
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vrasbed cown lhe swrr{!. continued ercsion ", aQ" area could
cause slope instabilities and/or deposition of the erotlec soils
coul.d occur in the house area inmediatel_y below the swale.
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vai: vi:-Iage lvest, Filing wo. I:
Another critical problem area is the
Lot 22 of Vail village i{est, Filing }io. l. tt appears that miti_
gation of the r-andslide which has occurred on this r.oL wilr be
guite expensive. Depending on how much noney could be expended
:o saivage a buircabre.oortion of this rot, the r.ot may have to
oe abandoned for builciing purposes for the sake of stabilizing
the slope and road.
potentially hazardous areas exist
,,ri [.hin the unstudied Vail Village, Filing No. 1. In this sub_
division, entire lots have been mapped as being on metastable
sropes, These lots will reguire very detailed site evaluations
prior to construction, nitigation probably being guite expensive.
Iigbland park:
The area arcund Vermont Court
ircJ-udin_o trrcriions of forrner Lots 27,2g,29,30, 31, 33 and 34
!s:nct'-her critical problem area. In this area, Robi.nson
reccani zed a i-ancislide. subseguent i:rvestigations by Jerry Klu.g
i;i.\ssociates derineatad r sLide area encompassi:1g poriions of
!ot; ?9, 30, 31, 33 and 34. A reconnaissance of E.his area curing
cui !.r'"'esi:igation aJ-cng with the excavat.ions o! Test 3oring No. I
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to 5e a lanfsLide.We wouLd consider ;he
sliJe mapped by Robinson ani the sli,Je napperJ by Klug as i,he sa,ne
leature ano- thus combined and expan.iei:he t'ro sride ar:as. This
slide area is considered to be in cur lJazar<i zone 5 anc mitiga-
tion of this feature would probablir have io involve a conbined
effcrt. rtf aiI lots involved.
I t i s su99es teti that the ilighland
Park subdivision plan be reviewed by the previous ccnsuitanEs and
the col.rado GeoLogical survey for t.heir comments on the proposed
development in Ehis area.
Highland Meadows:
fn the Streanside area, although not,
a parr of this studies a!ea, it appears that previous investiga_
tions reconmended fills ln the area to buttress the landslide,
while present con-struction has undercut the toe in part. rt is
not known whether the existing gabion and retainirg warls in
these cuts were designed as buttresses. cutting of tbis toe
(r.rithou-,- retention) could have negative effects on stability of
the Lots in Highland i,teadows above lhis area.
ReEicnal:
The nost critical area lies in the
)oo: 3uDsurface drainage condi tions rvhich exist on the si:e.
'rlri.s, howe.;er, can .orobabry be :lii--igated or substanEially reduced
try an extensize subdrain system.
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::,ttv -: l'ighland I'teadow:, 5.i:.ing yo. 2 s:/aiI ?illage ifesi, ij.lijlg Nc. !:
The stabiliry of cut slopes in
itighland Meadows, piling No. 2 and vail villagcr -.test, tiling No.
r is also a critical area. As previously discussed, rnany of tbe
cut slopes in nighland Meadorrs, Fiiing No. 2 e;:hibit sl,lnping,
seepage and erosion. These cuts rrill continue to fail if not
stabillzed. Tbe pri:nary mrtigation tecirnique recomrnenied for
this area is to install a subsurface drainage systen ln order to
intercept the subsurface seepage. rt is posslble that buttressing
or retention of sone of the cut slopes will- also be requi;ed.
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I.II TI GATICN
llany differenE tyPes of unccn-
sol-idas.ed surficial deposits underlie tbe site and varicus
problens and combinations of problens af f eci the sit,e. .{s Pre-
viousiy Ciscussed, sloge stabiiity on Ehe site appears tc be
controlled by three main factors, the topcgraPhYr both surface
anci subsurface drainage, and the geologic units. Due to these
inany variable factors, the type of mitigation used on any Par-
ticular site or problem area will depend on its site specific
characteristics. Depending on the type and extent of the hazard,
a jcint effort may have to be made by t?c or nore lot, owners in
orier co mi'.igate the hazard. and reduce the potential for insta-
5i 1i'.-i es on thei. r lots.
In the case cf sinall i-o mediurn sized
Landslides, roitigation could involve removal of the slide debris
and replacement with cor.rpacied fi1lr drainage and buttressilg of
the Landslide, or. in the worst of cases, complete avoidance of
the hazard.
In the case of possible soliflucti.cn'
ihis can probably be at least slowed to an acceptable level of
risk by a sys:em of drains which drain the water frcn the deposit.
In the case of 9u11Y ercsion, sinPle
instaLlation of drainage structures which are non-erosive would
preverrt qully ercsion.
fn the case of the slumpinE observed
!.n the rcad cuts, a cerefully glanned and iesigned subsurface and
surface drainage systen rould be the first initigation measure Eor
these areas. fn some cf the cuts, stabilizaEion by butt'rasslrg
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or retaining ma'it
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also be reguired. Depending on the
can be tolerated due to skir faiLures,
siougb walls or siough catchmenr,
anount of mairtenance which
and -'i1l and sheet erosi.on,
be rn.; may be necessary.
In reference to the poss!b!e nor/enent
of road fi1ls, nit.igation could incLude cont.inuous naintenance of
cracking, stabilization by sone sort of retaining structure, or
in the worst case, cornplete rernoval, stripping, keying, benching,
compaction, and drainage. one probren with the solution of con-
iinued naintenance and cracking is that if the firr noves to an
ex'-ent 'Lhat it reaches a water or sewer line, a similar failure
coul_d occur as has on t,he Bitetto property.
The prinary rnitigation technigue
which should be investlgated, planned and designed for lhe site
is a subdivision-wide drainage systen. This point cannot be
erophasized enough, This drainage systen shourd be installed
based on a detalled subsurface investigation and analysis of the
groundwater. conditions on-site, analysis of the existing utiri-
ties systems (sorne utilities qould intercept subsurface seepage
anci if not designed to do so, could increase the problems), and
careful design.
Critical problen areas shou1d be
investigated in more detail as soon as possible in order that
so] utions can be found to these problems.
We hope this has provided you with
ihe iiifcrnation required. rf you should have any guesticns or
reguir: additionai clarification, prease feel free to contact
L i ncoi n-D evor a .
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dT HoLE No'
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trtrur SCaTrl
d?efErS,
PtD -8R.v. r
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te'ro57o,r't
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at.tct ClUf
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aP6t,t/C
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5tL7Y, w/r,f
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Ll,\COL\ | ccr-on'roo' coLcRADo sPRl!lcs '
O.v-O-AE I tu-q?to :.::-11)t?ol,"tifil!3 :f-1itiE'd;s' ! sir'vc iur'ortcN ' uoNr-aosE ''c'i6ibctSis I wvoutxo:ttcc< spatt'is -
ct , cttl,
,rtrrt tcre ,-7.'na/gL't
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61,6.e/,
62,
tz7r,.tD\
ptD-82Ar.
F P/14,
k ortft
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SaAtEt
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tlrA f€4 ,4f lt.
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DRILLI''JG LOGS
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'HOLE NO.
ILgVATION
61, CLef,
,,Ytrrf 5AA7n
aPerEzS-
t Et a/t,
!t*cLrttrr,
t'X,lr5/t:tt t"€
5e/VE
Dz,LLED ?.2 78z.
I lb.t tz
tVo br4rek
5e'>rE
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6Z, cL.t y)
t' 7a 5Aer7,
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t !. rYJ *{iclr)
t/2.vr, .|tattl
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lart aEtttry
lt n€
Sttattertt
6l , 6.t/,
v7/n, t€t771
6iur€26,
e^hi'\,*fi|,
F/r21 .uottl
lrzt.ctrra
5t/n!
vE2r 5r/F4
ota/tt7t
'tt e /7'.
Oo.uoaa
DEILL€O ?-a
AF'EE 8
No.JtrEz
t/ta
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tait rf
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F/4u4 58
D R ILLlIlG LOGS
L!llCO L N I couoaroor ccLcRAoo sPRtr{Gs 'DeVORE lpuealo ' 6LEflwooo sPRt'lcs 'aNGiliEgils. I cnrno Jurlcrioll . rofliaosE r
f :()L35l5fS | ,iyov$,tO: pOc ( sPtiN0s
a
...
SUA,'ltvlARY SHEir
I
I icr:;pie €aa c4 2r''- 5/t7Yr.t322rr
,;:i.r ;r. .{/fdl i#rl .VtJ eol0lLtl' t O I Y,
iry irb. zrz-Z Depth i,ryptcnz
Teti uy ple lrlo -
.:VE ANALYSIS:
lve lrlo -7o Pcssi ng
Irt:t,lrci Wo;er €onren: (wl /4,? 16
>l)ccrrrc i--fcvrt) ((r5,In Ploce'.'.!r'rsir:t' tf"i ocf
Pic:;ic t-lmii ?,',-- /6.2 ".t"Lic'rid Limit L. L- 274 o/o
Plcstici} lriex P.l._ lt.? o/o
:ih.': .':s.ccc :-j mi ;---o,1o
Fic v; !nr-'iex-
5ir;"irrkcge ic,'io
inches Settierneni (l:n:oiiCcticn
PEi,v:-r.3il.li-i:
r)/^under Psl
2eC'.t
'. hrt
: 8C.3
| loo.o
f ?6.7
?' 94- g
es-6 V; l';rnerri; Ci:onge o/o
Lirreoi 5hrinkogz o/o
,tt!C;STLrii: DFr.jSiTY: ASTM i\4ETHOD
Opiir;.ui'rn I'rr'isture Ccnient - wo g-4 cL
/r,lc<ir.run iw Der:siiy -ld--pcf
Cc i i ior;r c 3ecri ng Rctio (cv)---J6
Srreil' ./ ncl< o-zf oh
Swell cgcinst-86a-psf Wo goin 06
EEARING:
i'iotge i Pe;r.': iro rne re. i."L------."ti
Unccnf i r''e'C rjc,'iri:ressio ;r (qu)
-psf
Plote Be,:iing:-psf
: 87.5 ao./
\ Edt
54.
.DROMETER ANALYSIS:
'cin size (mm)%
eeee__-oo€
43,O
?5,1
K {ct
VOi.J Roiic
Su I lcies PPTN.
F/6uze 64
Ll NCOLT',i-De vCR E TEST! NG |jBCRATORY
coloRADC SPRtNGS, CCLORADO
sotL ANAI.'i sls
.a
'. . ,''SUMlvlARY SHEET
il Som?la Cz, dtar/- o26.A//c /824€K)
,aiicn ;..'6tl A/YO ,>|EPDO wi ta8aln
|ing Nc 7H-z Oepth to'
hple Nc . 2
Notuiol Woter Ccntent (w) 23.? o/o
Specific Groviry (Gs)
I est
D,-ie
i es;
No.44708-6€
7-90-82
In Ploce Densi ty (ro) pcf
Plostic Limit P.L- 2o.?
IIVE ANALYSIS:
i'eve No.7o Possing o/o
w,It Liquid Limit L.
Plcsficiiy lndex
Shrinkoge Limit
L- 33.1 o/o
P.l. t2.2 7o
lttl ,1
?/o
?/o 2:
o/o
Flovr lndex
ShrinkcAe Rotio
.foo.o
q6.7
YDROMETER ,ANALYSIS:
ioin size (mm)'/o
' tOZ OO 42.5
@,€_-zlt
Vo i ume tri c Cho n g e----------7"
Lineol Shrinkoge
MOISTURE DENSITY: ASTM METHOD
Opfimum lv'loisture Content - wo /4.7 o/o
lvlcximum Dry Densiiy -/d4cf
Colifornio Beoring Rctio (ov)--J6
Sweff,/Dovs-4lo
Swell ogoinst-45o-psf Wo goin o/o
BEARING:
House I Penetromeier (o")--,csf
Unccnfineci Compression (qu)-psf
Ploie 9eci'ing:-psf
lnches Setr!emeni
Conso iidotion lo under Psf
PERIr'EABILITY:
K (ot ?CcC)
Void Rotio
Sulfotes PPM.
Ll NCCLi'l-ie vCR i TESTI NG LASORATORY
CC !-CR,CDO SP9!NGS. COLORADO
,r,/€L,,Z€ /e6
SOII- ANALYSIS
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atO
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az ttl ,,z,oc)-nm {
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@ql (J.t
p < + F 3 : b . :^ 3 6 - :" a " * ; € d = € ' a ; s e p F>t'r9-9"=
- e o-l r i5e?/ t* r :r.iictittt.+-&
E#qiEgEi E,i $ : i A q* Aifi+f ;ag *3 89:6e:- i = 4 iree€Errc*l*9rej+eilr i;$tii;;; ;,"F,;,.i= 33113;Iigisd:;BFl3 -qgitE:;:g t i a 1; og:'*;i*l:.;1"qEii,.!*:si:d a; d=.u#3 #!.= clr*l:: Eq! di ; gEe F?p*iis:1 ;tF4lqf: Itagflgse;ig;ggg aE-erF*B! e: g;;:g Ef ra- lnCfCiE:3ri ii;ifc}lS ;= E:3;; l;Hg;sq:Eq:;;lsg E+Eiq;;9i it E;;gi ii;;;igEgliEi=;;j-gifd4+:* Eg dIi:€ 9;ar::HF-5,sF*91s .'c;€E'aie' f,i ;gaig gg;;-g+9:::+1 e;1ti13tl'€ i, se;:r tgli iitljt** :g
'$g3Eigil Ei 1i;-- i"r; i:ri!+gs s;sia-:,Fs:i* !*E f.,l 3 g ;* iEg*i*f; $3 i=5igi5*i i* "i'5 $ '. r, :3+;*Eri sB
iEsggi;gE gf i g s i Eg H;Siiii* *g ;if?Pt'*i E" ! I c lF ;;+li?A; ge -":9f il;€ ;= 3 € 5 : =-* 1i=c-a * i;$"6" r$; E g di i q
t l\J
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crpJo=croo-E (D=o(DrD-t O€.+=t-to q,oo.Do(Dn E-<-t-to(D .o c+ C) c' 6 z O C rE) C t$ O -t c+ - (+ O O f) f) c+ 4 (! = -{ c} .+ tt
-vt.-tccfano.'ci=(D=r+-togr==.(,//|-tJ=tn O-r.J=.DO(D-(o.Dr(DJ-t=lDC-=(DrDO
(D.D c+ O- 5-(' O -c+=dO1 l(DO 5c+O-(Dci =o-O (D = O . = O = O ! | N O-= =
. (D c+ . I = O O (D -gc+ O -i O.D.'(Oc+-r.'c'O(D-:-OA,(^cI-tdO-(O-Xk(D-ll -t=vtc+O-JOn.'(foct9l 'o!eJ.-r.ur(DtnEtcLo-t.-f(Do.D5c+c+a)3=
ou.=35-{GrrD==cr(D€(O=o-=-:<500(4 (< O -J () :' q, A :' < O = -t qJ .t (O .r o, = O (D .I) 5 oJ r ct (D lD O =C''=!-i'.-to,cf(DO(c)c+C .+ rO (D (O O ci J. = .+ sl o, O -r. c+ Vr (O .I' c+ o- tn cl. ci rCt = (+ .D
=J=9,O=.+vr(o.DO-.c+O=-=c+O(!c+=(D (l) cf cl ct ut (+ = c+ o J. r ur - c+ o 5 5 (D = o (D o, - (o o = .+ -o- =- J. Ul .D = = -t tO A -{r O =(O (D 5 (D -t 5 r) C c) o, -r |D cr =C)(D(DIOOOOT(Do|O9T(DJ.O(D(Dc)c)(D..+O
= O u, O c+ -t E c+ rn -i 3 {r O- -t .) ! -J r) -l O- c| (D (-+ -t =
(O an o,t.o=r)-i-.t<+SttrCO=tngc+O-r.got,/r
= O o | (D or o o = g, e E o v o, - = {r O t -t r.= v, c+ (D )<€c=-h{ct(1=(D (D=Eq,5(D.lotno-
1J.0'3 c+'O = - N -t 5 .t 5 a - -t (D -r. J cr -t c+ O o c+ o, -t E O o
ci-!-tcfo-r€=(Dc+(Dcf C,O-O CL A, J. ct () -r a,t1 O cf < 9, (D = lO (D .D.-l =J.(DOO
=(D=r.o,Ooo(DUro-r.OGttt7J.tn-5q(o-b={r o, < = o c+ (cr 5 < =r o o )< q ' u, cf c+ :' (D .Ct o o o -r. .+ q (<(Doo-t/ro(!vr(D(Dcrk
-+roe.u-l-r.o,fDoer.o(Doo==-6c'(D=CtOO.DOctOS'(D.(Jclst(+OO=J.=O-
==ct=toJtctA-tr-(D(no,=(D.DO-(D(,OOF o(D-(D(D<!ct=cl'o{r(DoocrurQc-=J€rn=o-o=<@-cfD-t.Do-cro{-+r=o=t/,tt <+ u, o o .D o ci (D = c,'-t ct -5 J- o vt = J. {r o (o o .CJ-.t=t (D A cf sl - t' -t O ll\)? 0.' O vr ci o| () (ll = -t = Vr lO () -tr ..) \.O-(D(DeO !rE=o:to o, 0, ur (D (D .!r r r.o 4 (! .F '\- ur g (D,' f 5 -t 5 .+ ql rD -i = -t = !, l\)t/,-E'Or-t(DOtncc+tnocfoEC--tror+.D<(tl +Our.r=O-tr-h(D()J..trrOct(D(1-t(DJ.=oOl -rr3oO<ut-tOOo.)==c+lD=J-c+'ou,(.lE O'(DJ.3.-.{rOJ.OO!(trctVr(D 5+aDOd(D4=oc+-r-toooqo-ko:'=l\)clJ.=-:=.+OclOOJ.O==-tf1,-ttt(Ctc+Ol,c)ci
=rntn(DJ.(DJ.-vr(,O<(Do(Dc=Occfr+q,o vrgt(oe<+==tn ..(D-pr(D(/|(O-O'('c+A(D-to=ra./r'O5.DOO o-OC=.5.DE..a)+C.-c.lDJ*oo-r(Do€otrr16o15.-ioo(D-h(,=
(D (o c O .I).rr - at {r - .l'i.- o o o o o . = o 'cr = o o 5 = o Or)c+(oc()J.fr-=J..= t/'-tOtD=5o,c+C(D EA,t,c+c)C]c+=.JF=c+(t)c+vrO-=5do.3J(De==(ocooo.-r=(Dlno-(D-d (ot,.'O-Vrah.Dt.+crCGJ.@'g(D(D
= -r. O. (D ci .+ E c+ (.) (+ , c+ ' -t o, O- O. c d=o-<--tl/r.Da-toc+-or-
!.Dr+()()c+==cltrr-Joqrc+r).A,c.D=O(D
-.tt{rOOcfc+.DAO(O-=!O=c+7pA--Jatro-l qrctO,.OCl-tt(D.DCL.J.(,=S
=-,.o8=o-J(./|oe9rSsogo\o-,'=cf (4C.D=O!r)t,uroo=cfo|,
=9rd:.Do(D(D-t-to(Dotu(D q,.!c+ooct(D{toc}c}(D
O c) ,, Jt atr = O
=tD!J.oo-=t/'r)-o,.
I (^)
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o
(1 m c+ gt 1! U (O -h U, o'| - tn O- -J !t O. O o| (O tn € A A q ef tl, Ft ocr=r).(!(t)oo-r.(D-(DT(Doc+:!G).D=.+=@(D.
=-rDo UTC.Do-.D--.(D(D.+(D=E(D(!I(DS,Jt:'CF.c)c+o-'.tn.D-rocit--'.+o-r(DJ-oo(,=()J.t\)=-tcr=0)(, -n=.(a:'tnoo g<
li)-t(D-J-(DC+C)(D(D=O<Arc+E(.)<t--t(D5-t-!c+OUt(<CL5grvrr)O(D(Dit=O(+c+r)(D(Dvtc)J.c+.Jn.(D-rc':55c)5|OO--r.dO€O(+Or ooJ.cJ.--trt(oocl=-'Ci(oc+=i.
'1(O-lrul=tn pr(D(ocooo=o-'o
oc.+c+t!rcrurcfc+vrorclo-r.c+ttci,c+5qrc+.+<+l^
-tnr.::r(Do-OC(cI=(Dc+!r-t=EO(+=Ottto==c+O O (D cf I J. = -t (D (D tn -t = .D C c, = () .D O -t ci ct O .D J. J O=5-n<tn(DO(DOgro=gO(O=-tJ.=Ur=C .-t!o(Do|J.ctc+5=or(/rc+o-tor{r|ncrc<r|(o()5-t O I = Vl c|. O O O ICI 9, = @ C ct - :t ci r. C r) c) a)Ur c+(D O .Ur = (D -r. - (.o = {r -' O = - c) (D = -t .r .ci Ur = O e C
--O()clO<-|.()Oal\(DO(EI9rC)Oo-(DJ Oc+O
=Ut= c.vtCd.O=5.+-c+(Dct=gr-r.J'E,=C..=o ogrvroEooJ.vt=o-wJ.gr.D<-r.(oc+=-J9ruro-<+ec+lJlo--!,=-'.(Dc+eooJ-t(D.tr(oooc+o O C o, .D !' < O = () =r 5 5 c+ 9, O 3 - E O A, r+(O € d = O! = o, 1 O = =, (.o O (D c =- ct (D .r. -rr (El E O c+ = () =A,i.=rD-.O.5ctc+O-==(D()lr=-(1O (-t- .t (D O -b (D O ()'(' <+ O <+ = c+ O O oJ O (O o, .+ ct I ci .D (D O |D -t
=-lrX-o,O-tr=(Dt/rr.D=fct=O==O{r,^ootn:t=(rrEl(D=tnJ..(,|,o-ut=oJ.(D(,utr+j C -r. cr (D A, tt = (D g, .t tn - t.cl C .ct C (D c+ ci r+ 5 € cf O =c+ c+ 5 d = c o o ct = (D (D o, - -r. q = t (1 (D = (D = c+ 5 --t c,O(D(DG4.-r.(oOO:r=(DOgro,-t(D=(DO=cl.D(D -oL)(tor.-tc+ou,r+-rtsto-*5 oo(D='oo(to=(clooor)(D=u'rJ-=.+oorD=tt gr-qrtJrt.(DC)(D-r.OCc}c+q(O=J.(CIJ.C9,5(,
- =' to (, :5 A, -r. o = J E on. - g = (< .D c+ (D c+ -t (ct .'i = io |D =r+(!-r.O=(OJctna9rvro{lC(,lO(D(l)Oro,m(.o (Doq5oA,ov,O=c+=-i-3oo,-t-l(oo-rtog=-r
- (+ fD (D c+ -t'O o- (D c+(O () - c+ or J (D - () r. Q, -r. O (D (D cf O oJJ.o-r.(+<O--O\. locr9ttn.(1E{D-!. t.-tA= -t (O=5q-t O {l (D(D=.t3(D5(+clc+at=oo=r.oooo(D-t9 o J(D(D-cl.+c+OOocc+(/'<+g=(O.D(D'!c+(D-.+vr=@ooo=-=<e(oo<+.=o5o(D-o,o(Dot(Do-i=9r<o(o EiA-=(DOO-.TE=-t-'O-r'r|D:O(Do,O=(!(DNg,=(olr=aeOJ(D(D.DO(clc+c+cr(DOa,'-t(DCL.-(.o(DJ.TOc)=q,o,.'o-d(.c!=.D(Do-e (D(OO ..+ a -{i .D 5 o, -r. |D 5 j': <+ E 6 O
=i.OOOo-O(E!E(Dr=EOt'.-oooo<clJ.O-fr O=-t€J.FTO(.)(D.D-r--O-ci=-r!-tJ.Jal,J.(D r+GIOO(D=citgt-t5grO(/|()-ltn.D.D9OJDc+=X c-f(o{rJ(oo.o==(o cfo= J.Q.o_>Gt=tnJqr-tooo5-ht/r(,|-l:tto-o,
=-totncf-r.-do(Do,-r.I'ccuroqreJ.(D(l'=tD(+=t(D.+ttcl-tno-(DOSo().D-oE=5J'o (Durr,o-Jo tnSEEtntnStrrc|(a-t=-rr|,=orJ.tn-=Eo.t5 (cf(D(Dor+fD:to,(oe(DurcioJ.=(rto(Do(D-u'r-'(+ -r. C) -t <1 ct. = = (+ Cl cf -'O=5i+.O (D< -r)3 (D:J.(D5-r.{ro9r-t(DoJ!OE==(Do(D.tO=(DirOO-Jt(D(D=O-:(D(DoO (D:l'DO-=Or<(cl:JtJEr-i(D5O(t('clT tJr-o3..otn.D3(D(oloo |DJ.O,.rO(oJ.=\,oo=5:o=-tclo r.oo€.D g(D e o
I 5
I
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il
o
croot;/|q cr-t-t(Dc o=
.DOc+O.cfAt":'.l(J ooE(D-r.t.-t--<G)c+oo_5(O=4c|E.D-r,[==-..JJ.q,.-c+-i=.+irr1(DoJ.=c+o=cr|Dc-&aQ <i-€+€-5 6q,Ea-{!uJ.-o-r'ctl::-r'colo-r+oo vr (7. o, -5 v, -{ o ct q o g ct o- -t c} T sl () q| fD a+ g c+ c+ c+ vt l'(D.-;nj==sJ.€o aO9J.Doo=ci(Dc+-J5l..oo-vt6(DfD(nootno-t=(Do1_o -dO-rc)c+-O-€-:-Urct5=(.).D-t-EI,OJ
- tt't doatrr-t-t5(o=co--n.D=-tc:i.-1i=.-lra^o .i. o (D (D + tn' -t.+(o att- flt o o gr -t a ur (D o S rlonx i- -Err!-lt oJ.o -t(Dt Q C tCl 5 = c+ o, O- = c+ e r+ = ct - :! .I,c+ q q, (D -t r: = d c q d : o,- o .+ o I q| (D .n (o + o J' o = @ .D |D = ="-Fr;fltob=.(D-otb-tF,nto.Do=(Doo=ryo.
Ovt it+'gO -('-t1 c ttc= =) oc+O C:l -5 c
= nt'- r. 9, - d ni tr c+ c o = E o o -t q, -', v, = c+ o .or vt -t ra <j d n E -r d O I (o
= 1 mo6roo6 -i. -.nt o rt- c c+ct 1' oo'ro :1 --t'd1'o(truo ; Fr,,--aqiJoo-r3 i .+ io o t! o - o c| it - rD =' to q o c r+ (o =', cl e't -'' q' = ei i b, = q 3 t, - = (tl vt = vt (D (, vt = or o (/| (o cr o-aa ;o'Edni=uro€ur€:to-c{, etn(D(Do,ooqi.eJ.O(D==(Do=o.D{rcs(+9t -itloc)vtcto'tnJiod{/r-=(D=o-'u!lDc}oe n5 C (D () - -ti = = = r -' C tD c+ O c| (D c+ tt 9, = :l c| c+ O-..dorr):'-r!.nd<Ol.ooQo-i=o.c+N(D=€q
oJ (D o c+ - o.'o o o- o e c o (+ vr o (o vr (D a J c+ q _ c+ (t c+
=--=-(D(D(D+ut@crTooc(Doct(D N 6 cr rO -5 .dr '(D j = ! a e - O (D j. (D O = . o.| ci o, < a. = (D l. €
id O =E -t .f -t -t'= rn J - c+5 (o e(+ (1 e o cf = -"tt9r(I)6+=3-{t+c+r)c,io==-C(D(D(D=Oq o = (D - .= (D (D J; o, - J -l ii -. (! -r- O = c 9 't o :t == e -t c+ O O :. .n (D (D di cr q ::J A, () O O -'- c+ o' (O ur (D =-r U -r o. = it- = :t O ro qr -.. d o = c+ = -rt ro- J .t r+ ?6 tn g, -
= o, 'i- ot o .-t u! (o o, r+ (o c) :' (D =r' ? .+ o o- cr
=-==o5=ocrovttogr==.D+-o-=Et@.ro5o-cttOo,.n.=!tn5.Dor5:5J'J.5-qrro-{r-nrotDctctcctlattn-ct(o=O- = -r (.O -t - O o. fi g -t' J :'' A -t (D (D (DE qi - -t (D =(D 6 j.6 c+ O 5 Q -::i-o o = cr(= .+ti 5 o O = (o .+ ur (D -
=
(o 3 vr .o = -J.diD.roEijro-..'-g (o'tO=oi-5(OOO.+.(+.c+'tOr+-oJ-99('/ro'n 5 =r + (.o rn t s (o = 6 r ='a^ = cr a tn = = - ?--J.=-E=-r.(Dl.D=cL(o.DO(o gryr-|lt/'SUlc'=c+O-=.(DO9rclJ'-n-.Dc+Ull:,ulcf
=as5.)j-roii-;--!-'-(t| .+ o E . () - c' dt € (D e| (1 (D cn O + !, 't v,-o (D ::t Ur -r. nj g o .t -Eu (,
= cl I 5 c+ o (o (D ur Q 7 t' .D q, d T 5pr-r.5O.=+Ok(D(D==-J.=-=c+=a-to:!o e, cf a, nj cr(D -ni J. 5 = ab = 9 to vt ot 6 -!E (D o :! o N
='cr ;.8 E .- q, o o o + - a= o .D O cLJ c -'a o :t o o,|
=-!r-165(Dgr(trr+-tri1-.q!c)J.(D(Elf@rra =.Ct=g.Oc+-OJoNE =@i.rrcF''+o-0t.+c)o-ro''(D=rDc!€,=o'ooo-oo(olo O(Do.5-.5a(Do,OJtO4-,-OOrD|,5(tlt {io-'';roul;-+J (+-Grt J.o-r+inio,tD.(D-r.oq.(D-
=- .- ir,.,o to :i ; - o -r = !-r' O .+ - + o (D (D*,rJ-E**.:€ilr''J-'-l k (D(D(D (< ': o-
I (tl
I
a
€9n E=gg.o on O o, -t (D o, r+ ri ! (D = -t = tt gt,Ct tt c+ € !
- 5 (Dx =. -t5 =l.(DtD =(/l< .D=-'-rl, TJ ci-ni.ooc+(Do(o=ttt.Do(DoJ.(Do-N-
=--e,(DaD'i+'oc+ogttnci=fDQ =OE-rofi'5coO=c-{n..nA.ctO-€. oJ f\ J c+ O >, -t rq tn lD = = c+ -h O f.) q- q
= -l! It O r N J.
=
vr o,
= 3 . nt .-t . 6 X tt (! o- tn 5 (t . = € ro q, Jr' -t (D' 1 ? O o, :!-qt=-h .D(O(DO'OJ..toi.5(t(D-tc+.ClOA-(D€O{!Of-J=vtc}=5O(DO(D-qlO.tt{5-t|D,er^A oo-t,c+-=A,(o=(DqxE vt c+ in I o O O 5 <.J. 8 .u o J o- E c+ ! cl { ut t = .t
O-tJ.-=(O-ttrn(D.D -io=crt/'(D(6o'()-(Do(Doqrci!@'oJ-+r-c,o - o lr o- 0, - c = E -t -t c+ i. c) o-(o o c+ 5 5 (D (D ct g r+- o+ 641 Q tr, rooni-Jr.D. (D =o+ oo-tc)qaQ'o9t?9 ro (D = aJ, € o + (D -t t o < = F-<t o ? o -r' cf E c+ cf (D o, a (! o .D t-lDt-rro=+!.D(Do:oJ ..+ ni () r cf r+ O O tn O -t tn A Ln I ? c+ o, (D = -t -t O < (D !t/'-tc+Ct-..vto(o-.-j(/'lO-t-t.Fto,r.€J.a (. fD O x = vr (D -h -n 9t ar', () c+ ..) C) O = (D qr .. rO -h-c+oJ(Dx=k'ot,o-q5fDc+ct=-(Dato5J<tlrcl,ia J- u1 ---' o(D-=ltn c-Jr|c+oo=-J ()olriF(DOJ o OQ = =o -'tt + - nt o- (D o 5 c+ a (D = -t e -5 -t o < o o a a
=d(r,(o=(oeo--c+o-r.(DE./|e{(octfDoc ta Ei -t-e =t!=.c (DniO-ek=crtc+)tn+O=:Ogf'-t+==r(OavrJpOO
- (O C) i^ g, r+ -.. ! = () E c+ r+ O O (D = A =
d' c+ -(' o) Cf = =c u - .t = c+ a =. g n! = (D o) = ?n -t o o o J. k = o an vt
o (D O o q+ J. c .D: < O O o cr 5 .D qr o- c+ =
q € + .o c+ cl.a+-ro=i-r-=a=5.fc+
-ni.+o-tctc(7=OoJ(Dc+l(D(D5.tC).D=o,rDO.).)dio=ort=-J o(D(Jat,oEdttnoEo(D(D(D?cfer-Qoo:|.:l.r)-=cl<trc)oJ=HOaaETO..)(DOO=tcloO 6 0(, (D O (D - . ul q .A - ''= tD ct C) g, r,) 'E = = p - =5 r+ + -rr - i v| g o F (D Q .J, c| u1 o- Q = a o o o = O o -€ - i o o {n - : o tur o - = q, :.:)g (D' d tt c+ c' (,d.E o (D ur v c (D
=cro==(Do'ooo==- c(D(t9Jo--to-ro .D A' + =. 3 - O :O -t O o (o (o 9t I' o qL = 5 vt c = ci -ct 1 iD :i. t, -. nt - '- 6 t-/, 5
G €(Dooo-=.=5.lJ..=,Jrc+=(D=+oo--t(+g:A,€=l(Do-t .+=.acj.'='g(D
=c+N==c+(D.ttoEUnr.O(.)-r.(D(Dcr(){Ori€(D.D(1(n - = a = =. (o = O_ = -r ur vr r) . .f tt t o6itol5(Do--€=-'.e(D:!9=o=<_+-c-.5oc|=trroo.nO(ir=:tq-hct.noErr,o(D
=- O 6 -t -.o (D tso ci= 5! .Jr= (D J.o (D P iT {r = = f o, -J (D+ooxxol=oaJcQgo'-lr!g=r.ooro.Do:iool.oc+o=l!oJ'rrc:oc+-=oQo=- ai c+ o, -r=.(D (D CnO 6 - ={! = (D -t (D J'g O- O, .+.t o, .D (D
o = = 5 .+ o i E o, | = ..,.(lt Gt q, o (D 5 cl - o, e -t o-.o € -. t! iD g, ; + - (D ., J.-F .D J E 'o = o c+ A € gt . I :5 €=.1 1-ro OO ot Oo-.+aa !! O-i. = tt (Do (D (+ ir rooiS-hf!Eo-oO6.+B = X-E d ; 9 - 3 o ; d' t 9. e 3 3' f .i E l -' * 3 i f 3 =3 g
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DRAINAGE AND SLOPE
HIGHLAND MEADOWS .AND,
g, vAtL V|LLAGE WEST_SUBDTVISIONS F'.;, i.a.-
Developed for the
Town of Vail, Colorado
Job No. 1845.O01
August 17r 1982
CL,\\COIIt] ENGINEERING ASSOCTATES. INC.
SUITE 2O7 VILLA:GE PLAZA
GI.E,N\I'OOD SPRINGS. CO AI6OI
,,.;g4lX:4!i...._
o*t" AND s,,opE srisrLrry o*tr*
r. SUMirtARy ....rr. BAcKGRouNo .,-::::-rrr. pREvrous soiii';N;';;;;&iA;'R;;oil;: : r3:i3 rv. ExrsrrNc suBsuRFAcE onarllacs-colloir-ioni. 16_rz v. ExrsrrNc suRFAcE DRATNAGE co*oiiio.'a:l:: rB-20
FIGURE
FIGURE
F IGURE
FIGURE
FIGURE
HIGHLAND MEADOWS AND VAIL VTLLAGE WEST
SUBDIVISIONS
T}.BLE OF CONTENTS
PAGES
VI . SLOPE STABILITY
LIST OF FIGURES
. .. POCKET AT BACK
. . POCKET AT'BACK
APPENDIX
REPORT o}I GEoLOGIC HAZARDS INVESTIGATIoN AND SUBDIVISION EVALUATION, HIGHLAIiD I4EADO}'S SUBDMSIONS AND VAIL VILLAGE T{EST, FILING L & 2 BY LINCOLN DEVORE.
1
2
24
25
26
bp_-
I.
Proj. O ,rnr.oo,
Page 1
DRAINAGE A}ID SLOPE STABILTTY ANALYSIS
HTGHLAND I'IEADOI{S SUBDIVTSTONS . AND VAIL VILLAGE WEST SUBDIVISIONS
SUT,I}TARY AND RECOI4MENDATIONS
A. Basis of Reoort
This report has been prepared under contract to the Tovrn of Vai.l to evaluate the curient subdivision fayouts, identify critical problem,areas, verify construction-of planned drainage faci.Iities,.identify areas of possibfe-irigh density housins, conduct additional leorogic i"ireiiigation-and-tio"ia"a cost estimate of recomrnenatd imirovements ior ttighLan:l Meadolrs, Highi.and Meadows piling llo. 2, Vail Villaie West Filing No. I and Vail Vitlage t{est Filing No. 2.
Extensive soils and geotechnical investigations were compreted on the Highland Meadows subdivisions as a part of_their platting during the period extending from r'si--tnrougtr 1978. No soils or geotechnicll investigatiois have been located covering the VaiI Village west Subdivisions.
Lincoln DeVore, soils and Geotechnical Engineers, have prepared the Prerinrinary Report on Geologic Hazardi rnvestigations '
and subdivision Evaluation contiined in the Appendix to this report as a consurtant to claycornb Engineering-Associates, rnc.The Lincoln Devore report is a compilition of-previous available studies and independent evaluation! on the pari of Lincoln DeVore
Recommended surface and subsurface drainage improvements and slope stabilizati-on measures are illustra[,ed oir clavcomb Engineering Associates Fi.gure 1, Existing and Recomirentlecl Facilities.
B.
The Preliminary Geologic Hazard l4ap by Lincoln Devore rJ-lustrates that a substantial nunber of lots in the undeveroped Portion of vail village west Filing No. 1 are in a metastable area where extreme caution should be taken rvhen units are constructed. very thoroughly designed mitigation neasures will be necessary for.these tols i"rrrictr ihourd foirorv detaired geo-tec'enicar investigations of each building. The nearly.veitical road cuts on Alpine Drive and Sierra Trail should be Lut back at shallower slopes and,/or retaining vralls installed. Due to Ene metastable condition of much of this area, the design of
'-tle.slogg cut and,/or vralls snouta be very thorough, anrl preceded oY detailed geotechnic studies.
o
Proj. No. 1845.001
Page 2
The majority of the developed lots in Vail Village West are on stable areas as inCicated on the Lincoln Devore
maps.
Surface drainage improvernents should consist of roadside dj.tches, .curb and gutter, or paved swales along the roads. The anticipated repaving of Gore Creek Drive should consisL of total pavenent section reconstruction,as the current pavement exhi.bits characteristics of total base failure. Hveem tests are currently being conducted by Lincoln Devore for pavenent design purposes.
Subsurface drainage irnprovements are recommended throughout the portions of the Filing that are designated as netastable,vrith an outfall to Gore Creek. These drains vrill not, in themselves, provide stability for the area, but will provide a positive outfall for subsequent individual unit drains and retaining wal1 drains, while generally removing excess subsurface f lorv.
The landslide on Lot 22, Vail Viltage West Fiting No. I (Bitetto Lot) clearly il.lustrates the hazards associated with construction in the area when proper precaution related to slope stability are not observed. Referral to the Lincoln Devore Hazard Map illustrates is actually in one o e Iower hazar
.VaiL Vill-ace West Filing No. 2
The PreLiminary Geologic HazarC Map by Lincoln DeVore illustrates that a portion of Lots 4:..-.43 anc-. /:5 Lhrouqh
50 are in a hiqh hazard zone. Virtually all of Lot 44 is in the high hazard zone. The remaining lots are in a fow
hazard zone.
Surface drainage facilities are recoliunended to properly drain Gore Creek Drive, consisting of roadside ditches,curb and gutter, or paved slrales. The anticipated repairing
of Gore Creek Drive should consist of total pavement
replacement.
Cons:ruction on any Iot near +-!:o netastable sloPe shorr-l-d be
precedc<i by a detailed geotechnical study and include
thorough mitigating measures. Undercutting of the
me'-astable slope could cause slides extend5.ng into -the
subdivisions above vail Village glest Filing No. 2.
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proj . No. 1845.001 page 3
Highland }ieadows
Several geotechnical studies have been completed on the subdivisions. These studies iecorunenaed caution in .
developmenr of the arei, ia."liivi"s "t"ti",
-iIiu"tuur.,
and high'hazard zones- -suuaiiinig.
"y"tems were recommended by certain of the studLes and.Jonsidered as a condition of approval by the Coloraao stiie Geologist and Eagle County.
o11y a portion of the subsurfaee drainage system shovrn on the PreLiminary plan and ttre construction plans has been installed at tiris time. tfre insialled system has removed part of the subsurface flow and reduced the areas of- instability to some extent. ft is g""=ti"nn"bi"if the sysrem installed is sufficient io deal with the area wide problems.
Portions of the building areas (ilrat is, areas not identified _as open spacel appear to irpi"j.-"" iiigt hazard zones. R,eference to the Lincoln DeVorL gizard l.tai will illustrate the areas.
rt is recommended that the area wide subdrains be instarled i-n accordance with the originar prans under ttre Jirection of a Registered Geotechnicil Engineer. Consideration should-be given to- expanding the open space designation on those lots where the bigh hazard zone extends ouiside the present oPen space area
specific improvements sr-rch as reopening the inret to the cu:lvert on vermont F.oad between Tracts B and c shourd a.r.so be accomp.li.shed. As-brrilt ctrawings shor-rLd_ be-pieparea of the subdrains in Highland l4eadows anci easements olrtained for the subcirains ro prevenr Luilciing ";;;;;i;;r-.,rrti'g the subdrain .'l ines.
General.cut-slope instability characterized by slumps and slides _11 the exposed cut slopes is evident tirroughout the second filing of Highland Meadows. All of the slump and slide areas are in locations where sub-surface frow is evident at free flowing water (springs) or saturated soil during the spring of the year.
The_ soils and geological reports prepared during the preliminary phases of Highland l.teadovrs Filing #i noted that cut slopes and other construction areas coul& only be considered stable when dry. Cautions about possiLle failures due to instabilily of cut and fill ilop"= rore indicatecl if the areas were saturated. The onfy aitference
hland Filin
Proj . No. 1845.001
Page 4
between the individual reports is in the degree of the verbage indicating the extent oi the hazards when soils are exposed to excess moisture. The su:face drainage plan for the seconil filing has tended to accentuate.the subsurface drainage conditions since the surface drainage pattern criss-crosses the slope as drainage is carried in the roadside ditches. This criss-crossing effect has tended to prolong the exposure of surface runoff to the subsoil, allowing rnere infiltration and thereby increasing the avaiLable ground water. fn additj-on, the surface drainage pattern has concentrated flows into specific areas whi-l-e the natural drainage pattern consisted for the most part of diffuse overland flow directly to Gore Creek. In parti-cu1ar, at, the intersection of Tahoe Drive and Alpine Drive, directly above the Bitetto property, being LoX 22, Vail ViIIage West Filing ,ii 1, the drainage area has been increased from a historic basin of .Iess than five acres, io a present,
drainage basin of approximately 24 acres.
Very few subsurface drainage faci.Iities were installe<i
as a part of the subdivision construction. OnIy a very
small portion of the subdrainage for Lots 7 & I illustrated
on the Preliminary Plan was actually installed. The facilities installed \.rere at the location of active springs
encountered during construction.
It is our. opinion, following review of the available soils
and geological information, reviet' of the construction
drawings for the subdivisions, and site observations, that
virtually all areas presently indicating instability can
be arresteci by proper drainage of both the surface and
subsurface areas followed by corrective action such as
recompaction of fills or construction of retaining wa1Is.
There is no evidence of extensive very recent landside
areas within the subdivisions.
The available evidence indicates that with proper area tride
draj-nage of both the surface and subsurface, development
of the majcrity of the lots will be possible vrith a degree
of risk which is normally associated with typical mountainside
development.
Lots 7, 8 & 9 are particulary impacted by subsurface drainage
at this time and installation of an area subdrain is
imperative, along with very thorough individual 1ot
geotechnical analysis, if these lots are to be developed.
Lots I through 6 are located partially in a high hazard
zone. In several instances, the building envelope
Proj. I.ro. 1845.001 Page 5
::til:_t ll_l!: record prat exrends into the area defined ;:,::gn"l: :u'd, :".1i1. "]1, o"i;rrJ: "i:"ir.iiJ;=8";i;;l:I:::,1,,::::, -l:'i:
i:;. iii"3:':;;" i";::':T:li:il, "::'i3.:n"iii:"::.:ll 1_.:: totiuy a;";;;;-;i, -"i"I"'itl."i"il
]:::::I:::1, ":-ligi-r,i,iia-1""""ii, inl';;iniffii ::ii"and ::::::lg:11. 5e9oi.ts for tn"-J.""i"pf"i.l'^ii"il
;:::H:::"?..1:! !!ese lots_be-.."ii,"a-uv Li"-i"wn ro j;j:lll::..' j^ ll:^ :.,,,",,iiy-a" ii".i -[Iiiuiil,'!i":il;. :adesuatelv reflecr tn. g.6r"iiil;r;;;;"ji".f;li"5i!51
Highland park
refers to the previous tuilding areas are Thrs replat was processed
Highland Park is a resubdivision of Lots 2G throuqh 42 of Hishtand lreador^,s. rr is in .n .rJl |f,;i il.""ii|i".r Geotechnical Enqineer for tn. l:ight.;a-;";;rl'ii!",Robert thonpson] recomrnendea atiinst deveroping. subseguent ::i1" a1d. geologic reports wer6 more favorable to the area, with the result that platting of tfr.t-portlon of Highland l.teadows was:approvla fy eigte c"untii.----'
The replat submittal of the area Geologic Reports and states that outside the high hazard zones.through the Torvn of Vail.
Cornparison of the Highland park building layout on the Preliminary pran to the Lincoln oev6re-iri".rJ'u.p clearly illustrates those units that are pf."".a, or in some cases under construction, in high haiara ,one".The Town shoutd consider submitting ttre uigntana-'ia.tl layout to the original soils and G6otecirni6ai i'gir,".r"for review and comment.
Based on the available inforrnation, the basis for approval !y trre Town of the proposed project may have been somewhat faulty. rt certainly lppeari tfrat te-iiting of certain units is. appropriate and possibly elimination of Some .rrrit" :.t suitable lower hazaid locations are not available.
A suitable surface drainage outfarr from the west end of Vermorrt Road must also be developed.
Area lfide Considerations
The landslide on the-Bitetto property, Lot 22, yaj-:- .village west
l_ir1ln l, clearly irrustrares'thl potentiar for srope fairures rn even mocierate hazard zones if construction does irot fo110w the recomrnendations of qualified Geotechnical ungineeis:----
o
The provisions continue to be addition, a re
rrithstand laterial
proj. No.page 6 of ordinance 16, Series of
r845.001
1982 shoutd study area. fn
s should b6
applied to all lots in the
evelopment t rement should be sed on all future
repar ual Iolgeot ca]' r sbe s on anal s clone dur ear eco gonsj.der sa
fgquired for alf b nqs ardl ess of Dtr at the analysiEJ-TE-mE!appropriate E o e ordinance laterial movement load.
also be to allovr
ae well for designs aa thoae that
ordinance to indicate
If the Town desires to consider denslty transfers from the presenr tor configuration to a gioup o? mufti_i.iif' sites,a map can be developed which ifiustiates tfre-piogiessive degree of hazard on the site. ii""a on this inaiysis ,nup,units could be transferred irom irre rrigirest hazar6 area ro the lowest hazard areas.
Another suggestion that a convenance it-em or be .enacted that re lhat thev irave G a]I purchases of lots
hazard ded with copleE-EEThe geologiE
are aware
nd rna r10r to purC se
and subdivision.zat eLr Pa
fne. fg]-lgr,ring recomrnendations are made to reduce the prob'rbiliry of future situarions aevetoting-.iJir., .o those a<ldressed by this,"!"it.-'
A statement should be added to the Final plat verbage to be signed by the ="ii= and ceotechnr.c.rr Engineer for the's_ubrtii,rision io-tf," effect that- he has reviewed the final pt.at anJ Jonstruction plans arrd finds thenr in accordance wi+_h his recommenda tions . '
Similar analysis !o ltrf-s report may be appropriate for other poitions of the T;;;-";"Vait. Eventuarty a conprehensive hazard m.rp could be tleveloped for ,
the entire Town. rhe pro^vi;i;;; lr ordinance 15,Series of I9B2 should ifren Ue-"ppii"a ro alJ. units focated in moderate to high fr""'"ia zones.
1.
2.
r-evrse -Ehe-ridfdlh!that "float', vrith
.
!,!
I
I
ii
t t
.d ),i .-!,
..;:
o
proj. No. 1845.001
3. An ordinan.. I?I b: il_ ::3:rtr"nuirins purchases of Property to indicate that [hoy n_rr. reviewed the hazard reports ""t. ;.;;iig-lniri;"ur"-i"-l=iilt. or property, Iot, .or un.it. Haziio reports such as avaranche and flood pr"in z"iis snould be included as welr as oeologic. rh;";-;;porr_s rnight be rnade avairable t6 potentiar,purchases in a central location Uy ttre Town of- t;ii:-
4. Il:^:.luir-emenr tht soils and georogical reports be Dases on the results of tesfs- conducted in the spring of the
sa r u ri t ed ";i, Ii"Ii" ;i. ";:
j:;;ii.
o.".i"lii..t:::" ",where appropriate. '- -- -r^''
H:l i::: ilg^:,1:::$:';;",i-inl.il,I'::";:L";1ff: "'
l"::*::::l?:-:r factors have inftuenceir the above recommendations. Th. o*+_^_-.,E"'4qsrrrrcq Ene aoove
both tand ".a r*--l.l:_:I::.T.ly- high pt"p"rty-;;i;""
that very rarqe i"rr-r-i^I.:: ::: _rewn or vaLr means
failurcs i_ .'^;---_?lLar losses may be .r.""iu!"a..riah :::' ::ffi";l"n?:ilu.::::i] -.
:i' J'i'oil.'i"":$"' ":;"n;:i!'."
3I:" ff y:'llr,,-tl3i, ":^._" j 9: tr, " v" i i-. i "I I
=l iu "; r::;T::il
f;.*:::j:on;-.fi"^ip:,! i# ;i;;.;;:"';;"i:Jlo::::"":
l!1" i:.:; ^,, l^u' l^ ul
: : I ": :li . " r. ii" =1. iii"'l'ili iu.."i:. ?f" u
;:' ; i*, ::l :. :r + :'' : *: l t' ii :
-;;.
"
" ;; ;;.= " io " llnlJ::l f:
3:::"t: " :n:i r l_*^ ::-q " .,," i r u ir ; " ;" -
; ; Ii =;,iL "i:' ii :purchase of property.
The Toirn of Vail should make it clear to all parties utilizing this report that it is not an in_dep+_h anarysis of lots on an inaiviauar;;";;.-..rf=IJ,,bu"oo,to a large extent, on previous worX by other soils and Geological Engineers. Neither the rown or the consultant team o_f claycomb iigin".ring Associates and Lineoln DeVore can be i""p"rr.iBi.'fo, individual lot conditions, the c
_con s r ru cr e, "" "a;;:;:"::
t:il" o;:;:i$*I"f ":in l;i
= :"u properties. All of the ,."o*unAitions contained herein shoutd be viewed ;;-G;";i". _ recommendarions and not const-rued as a requirement-. that the Town, or any other party, construct the facilities or foLlow the recornmendations .
Lincoln Devore, Soils and Geotechnical Engineers, have worked as a Consul:ant to Cfaycomb engineering Associates in preparation of this report.
The following. material Engineering for rlview pii",was provided to Claycomb to .ruly g, Lgg2t
Proj. No. lg45.OOl
Page 8
and
a.Highland Meadows Construction sewer, noted as as-builts, 2L dated l-5-BO.
Plans, roads, water sheets. As-builts
€
9.
,
il
llighland Meadows, construction plans r fo.lds, w(ater and sewer, Fiting 2, as-U,riiisr-IO sheets, date of as-builts, l-5-gO, l-10-gO, ti_tO_Zg, print". -- -
Mylar sepia, Elliott Ranch Subdivision plat, sheet I.
:I1::_sepia, Highland Meadows Fitins #2., pra|, 2 sheets.
:
l.tylar sepia, Resubdivision, Lots 2g-4O, Vail Village West #2, pfat, l sheet.
t'lylar sepia, Highland Meadows, plat, 2 sheets.
Mylar sepi.'r, Vail Village ifest. Filing *2, plat 2 sheets.
Mylar sepj.a, VaiI Vil1age west, Filing $1, plat, I sheet.
l.tylar sepia, Matterhorn Village, FiIing *1, plat,l Sheet.
Sketch plan submir-t.11, Highland Meadows #2.
Lctter rePorL by Terra Task to Doug Bitetto, 3_5-g2.
Ta:."1. rePort by Vlooclwarri-Clyde, Consultants to Town of VaiI, regarrling Bitetto pioperty dated 3_lg_g2.
Prelirni-nary Engineering Geology ..rnd Subsoil rnvestigation, Highland Ueaaoii Subdivision, FiIing #2 by Chen and Associates, ,June 30, L97g.
The following items \rere received by claycomb Engineering Associates , 7-g-92.
j
k
I i
a
{
I ?t ''t l 7l
G'I 'rl
fl
ProJ. No. lg45.OOI
Page 9
Highland Fteado,$rs_ Filing #2 topo'showing VaLL ViIIage
-T::: Filing .3 roads in-piu".,-i" = loo,, 2,rntervals. -No date or i".oril of rvf,o ,uip.a.
yill vj"tt R-tds:-::ry, l" = 5o', no dare of frishr or record of who mapped.
Sheets, L,2, aZ of T,.Highlands Meadows Filing *2 Preliminary plan "uu,irirlii-iy-ixata.
#1 preliminary plan
#2 Utility plan
#7 Typical cross settions
sheets.2,3,4,5,5 & 11, of II, Highland Meadows Prel.iminary plan submittal Uv t<Xetra #2 Preliminary plan
f? 9.?9+"g and Drainage ptan *4 Utiliry Layout #5 Landscape pIAn t6 Typical Cross Sestions fll Prelimin.rry Archit,eclure by ltarold Engstrorn, AIA
Specifications for Construct-i6n (not titled as such)Hisht.rnd Meadows-Fil-in? ,ii, i;i, Lglg, ui."rr.o'iy schmidr-Tiago Construci.ion - co.i.ny.
Preliminary Subsoil anri Geological fnvestigation,Vail llest Filinq )Io. 3, Cfren inJ- Associates, October 10, L972.
Engineering Geology, . Highland l,leidow; r Novembef lllr 'I977 , lry Charlcr .li. RoUinson unO"a""o"lates, Inc.without figures (Figures ;;;";;;""rry received).
Geotechnical site evaluation, Lot 22, VaiL Villaqe nrest Filing r, chen and arr".iui"", i"iv-!,':.^ier6y.
Daily reports by l{oodward_C}yde Consultants of compaction tests.and obserlruiion of bas6 course placement and utility tr"r,"f, -"Jrnpo"tion in Highland Mcadows nilinq 2 and Highland -v.Iaor" fr". s-"ifJiil",16, 1980 to N5vember fS, fSB0.----'
Vail Village llest, Filing #3, plat
Specifications for Construction ( not titled as such)Highland lteadows, ryay, iSiS, executed by schmidr-Tiago Constructioi' Corpi"V.
Numerous items of correspondence relative subdivisions.
:,i6i
,{
:u
.,.ril
'*l *l
lroj. lro. I845.Ool page I0
Material received from Leroy Tobler g_3_g2.
aa. Letter frorn TobLer commentirg 9l draft report letter included m?p 9f fo"ati.oi-'ot subdrains in -nigfrfana Meadows and Highlana lro"airs-rif inj i. -..a.."opy of lerrer to Tim 6".4;; "i-i6_sr-29 wis atso included.ab' pages 2 and -3 0f retter irom charres Robinson to Dsve Etmore ("o
-q?-.g "r-|a;; i missing), rerative Matterhorn Villase iu6Jiii"i";_iiii";-i;.r:
ac. Xerox copies of large Robinson Maps. Figures Z & 3.ad. SunrnerLee letter, 3_24-75, regarding Matterhorn Vitlage Filing wo. -Zl ' ' -,
ac. Chen and Associates daily reports, Lg79. Reports numbered r througi-ei, -iir'with
nunerous numbcrs missins, sucrr as;#3 ir,.JJgi, zr. ori;-;;.;irs zz-zt,30,34-36, 3g & 4l "r.
-f"i,road
compa_tion. Arl orher reports are for uiirity trenches. only #3g has any reference to site conaiti.ons related to roads.af. Summerl,ee l:::":, 3_lB_75, regarding Matterhorn Viltage Filing lro. 2.
a9 . Sumrnerlee f :tte:: 3_12_7 5, regarding l,rar-terhorn ViIlage FiIing #2.
ah. Robinson Letter,.-3_19_75, regarding Mat-terhorn Vitlage piling #2.
ai. Ilichards Engineers letter, 4 I'latterhorn Viltage Firing o;.n-'u ' regarding
aj. Chen and Associates prelimin.ary Engineering Gc.ology if i;i;:ir rnvestie.ti"",'--,v;li";;3;_iii,i3rl, o"r"
ak. t{ater and }tineral Consultants, Inc., Environmental
fiSltil", iI, lli, T".terr,oi"-vi r r,e" - s,uJt" i "ior,, "i r ir,e
aj. :::l *:::i* rr;1[;r.n, resardins vermonr Road rocarion
ak' ff;ilt:;:t;!;ol;3;tt' resardins waterrine compacrion,
al. chen letter, -6-5-79, regarding vermont Road fill across Vermont Creek in-Highland Meadows.
o
KKBNA letter, lO-3 1_29 ro Tim springs near Lot z+, Hijir"iJ
::y_"_.1::. report,. pretiminary SoiI and Foundation
i l:";:iffi l?,i ul"i;;;:"," vii rig.- Subd ivi sioi. -iir i.,e
ao' summerree, Supplemental subsurface rnvestigation and Slope stabirili- enarysis, -ilIlr..r,orn Village Subdivision, Fiting ir;;-i, iJptemrer z+, Ig74.
ap. part 2, physical
and Vegetation.being "Thompson, s preliminary plat
11-80 - Closeup looking at. repaired slor:e.
CircLe and Tahoe Drive intersection - Looking at slope failure
Road from Vermont Road - Looking southwesterly ;rlong Alpine.
::!";_T:;;ellaneous informarion received berween 7_L4_s2
Individual soils reporCs on Meadows, by Jerry Xlug and 5, r98o .
LoLs 26-42, Highland Associates dated l.lovember
Geological Survey,r-I3-78
am.
an.
Garton regarding
Meadows Filing #2.
site characteristics, Soils, ceology lloted in Tobler letter of 7_3_g2-as report included in VaiI Ridge submittal. ,.
Proj . No. 1845. OOI Page ll
to Tom Everett,
comp.rction.
25.
ag,
ar.
as.
au.
Thompson letter, I2-L6'73 to peak One Company regarding Vail West Ridge
y:igh!-Mclaughlih handwritren memo IO-2-80, related to utility tr;;;
Photographs suppJ.ied by Leroy TobLer.
Alpine Drive Su,itchback
:-1:-90 - Lookins downhill a+- Lor
:- I?^-80 - r,ookin! ar- slope failure rJtJv^J.rlq ar- srope failure in cut- slope.
1Y:,a9^-.,;'.-Looking at replirea siop" r"/irh rock rc r"/ith rock toe protection.
Seguoia
5- I9-80
A).pi ne
9- ro-B I
at
Letter from L.R. Ladwig, Colorado regarding Highland tteadows, aatei