HomeMy WebLinkAboutTOWN OF VAIL BIKE PATH[Tfunrcr,Pn( Art4'rr"1
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ocf,/i/tfirY cErrEL@ltE at
Beaign Reuieuv Board
ACTIOI{ FOR}4
Department of Comnrunity Development
75 South Frontage Road, Vail, Colorada 81657
tel:970.479.2139 fax:970.479.2452
vreb: www. vai lgov.com
Project Name: TOV SUNBURST DR BIKE PATtt TREE
Project Description:
DRBNumber: DRB070650
FINAL APPROVAQL FORTREE REMOVAL OF AppROnMATELy 15 ASPEN TREES (3'{'CAUPER)
FOR REAUGNMENT OF BIKE PATH TO ASSIST WN}I STEEP GMDE AND SIGHT DISTANCE
PROBLEMS
Participants:
OWNER TOWN OF VAIL
C/O FINANCE DEPT
75 S FRONTAGE RD
VAIL
co 815s7
APPLiCANT TOWN OF VAIL
C/O RNANCE DEPT
75 S FRONTAGE RD
VAIL
co 81657
Project Address:
EAST OF 2049 SUNBURST DR. ON THE BIKE PA
LLl09l2007
IL|0912007
Location:
Legal Descrlption: Lot: TrA Block: Subdivision; VAIL VALLEY 4TH FIUNG
Parcel Number: 2101-102-0100-6
Comments:
Motion By:
Second By:
vote:
Conditions:
BOARD/STAFF ACTION
Action: STAFFAPP
Date of Approval= 1L10912007
@nd:8
(PLAN): No changes to these plans may be made wlthout the written @nsent of Town of
Vail staff and/or the appropriate review commlttee(s).
Cond:0
(PLAN): DRB approval does not constitute a permit for building. Please consult with
Town of Vail Building personnel prior to construction activities.
Cond: 201
DRB approval shall not become valid for 20 days following the date of approval,
pursuant to the Vail Town Code, Chapter 12-3-3: APPEALS.
Cond: 202
Approval of this Opject shall lapse and become void one (1) year following the date
/
Minor Exterior Alterations
Application for Design Review
Department of Community Development
75 South Frontage Road, Vail, Colorado 81657
te* 970.479.2128 fa* 970.479.2452
web: wm /.vailgov. com
General Informationl
All projects requiring design review must receive approval prior to submitting a building permit applicauon. Please
refer to the submittal requirements for the particular approval that is requested. An application for Design Review
cannot be accepted until all required informaUon is received by the Community Development Department. The
project may also need to be reviewed by the Town Cruncil and/or the Planning and Environrnental Commlssion.
Design rcview approval lapses unless a building permit is. issued and construction commenas within
one year of the approval,
Descripuon of the Request:ZL^oun- ,-o i-6" *+?t "t Teaa.s Fa tz.
Location of the Proposal:Subdivision:
PhysicalAddress: €.*sr e-o ot- €t,-e',.+r t-r't /Jsr >s1? Ls4 |
Parcef No.: 7 tO I IULO t O O b(Contact Eaglq co. Assessor at 970-328-8640 for parcet no.)
vIg
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l{ame(s) of Owner(s):-l-lV.u t <tc- V+ re
Zoning:
Mailing Addrcss:
Owner(s) Signature(s): 4
=-&I{ame of Applicant:Gze uc' B,r<zic- fuC- 'Tbiu, C)P U+..
Mailing Address:ttoT Ec=tLt<o.rlt 'T)- U*-r r, 8t L6')
Phone: q'b Lr11 231)
E-mail Address: afr-f /'ie @ lr+ r L aaiz.d.,^- Fax:
Type of Review and Fee:
$s0
No Fee
$5s0
$300
Plus $1.00 per square foot of btal
.For construction of a new building or
For an addluon where souare
commercial building (includes 250
--$:50- For mlnor changes to bulldings and site imprcvements, such as,
reroofing, painting, window additiont landscaping, fences
retaining walls, etc.
$20 For minor changes to buildings and site improvements, such as,. re.roofing, painting, wirdow additions, landscaping, fences
retaining walls, etc.
$20 For revisions to plans alrmdy approved by Planning Staff or
Deslgn Review Board.
No Fee
fl Signs
tr Conceptual Review
E New ConstructionD Addition
Minor Alteration
( multFfamily/commercial)
Minor Alteration
(single-family/duplex)
Changes to Approved Plans
Separdtion Request
and
and
thetr
tr
Phone: 11e {?q L331
' r;u'l 08 2007
rebuild.
Katsos Path by sunburst Drive, facing east (top) and west (boftom). The path would shift
approximately 5' into the hillside. Requires removal of one 'l 0" aspen and fifteen 2-4" aspens.
The realignment will double the sight distance and lessen the existing grade from 16% to 1O%.
-@
EXISTING EDGE-aFf{H
\
-. -- -PRdPoSED E\TH
W/ 12'SHOULDER -.-.
EXISTING PATH TO
PONDS
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./\ oc,s--/EXISTING GRADPf6%
-?Sd! cd ,.-\" I ..'.{- /- NOTES:
PRoPoSEE 6Fnoe to"t"
EXISTING CL MDIUS: 50'
€r.r- ./ 1. REALIGNMENT WILL REQUIRE REMOVAL OFf-o$ ./',/ oNE 10' ASpEN AND FIFTEEN 2-4' AspEN
PROPOSED CL RADU91?5'
...
../ ASPEN GROVE AND WILL BE GENERALLY
s3?., uNNorlcED'
q C\3AqJ
:"?\',ffSISEUii|L?IJE5'J;SiRPilLOVAL
SIGHT DISTANCE ISSUES ALONG THE LENGTH
OF THE PATH.
3. THIS CURVE CURRENTLY FAILS TO MEETf;3 2-6'ASpEN REooMMENDED sTANDARDS FoR BorHx.J slopE AND stcHT DtsrANcE FoR REcREATtoN
PATHS.
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DESIGN Rr-'viLW
STAFF APPiiOVAI-
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Planning and Environme
t
nta
ACTIOI{ FON.H
Departrnent of Community Development
75 South Frontage Road, Vail. Colorado 81657
tel: 970.479.2139 taxi970.479-2452
web: vlww.vailgov,com
I Commisson
Project Name: TOV GORE VALLEY TRAIL
Project Description;
Participants:
Project Address:
Legal Description:
Parcel Number:
Comments:
PEC l{umbers PEC070049
RNAL APPROVAL FOR A FLOODPIAIN MODIRCANON TO REAL]GN APPROX. 4OO' OF
THEEXISTING GORE VALLEY TMIL TO ELIMINATE FLOODING CONCERNS AND TO CONSTRUCT
MINOR TMIL IMPROVEMENTS WITHIN THE 1OO YR FLOODPIAIN
owNER VAIL COLOMDO MUNICIPAL BLDG07lt7l2OO7
75 S FRONTAGE RD
VAIL
co 81557
APPUCANT VAIL COLOMDO MUNICIPAL BLDGo7 | 17 / 2OO7
75 S FRONIAGE RD
VAIL
co 81657
75 S FRONTAGE RD WESTVAIL Location: GORE VALLEYTRAIL
Lot: tffi8 Block: 5D Subdivision:-Vaittlitlagt€fitingF+
2101-064-0000-3
Motion By:
Second By:
Vote:
Conditions:
Kjesbo
Kurz
6-0-0
BOARD/STAFF ACTION
Action: APPROVED
Date of Approval: 08/13/2007
Cond: B
(PLAN): No changes to these plans may be made without the written consent of Town of
Vail staff and/or the appropriate review committee(s).
Entry: 081L712007 By: SDH Action: AP Applicant shall address
concerns regarding the path section nearest the memorial gardens to better
accommodate parking by visitors at the gardens and blockage of the path. EnWi OBlL7l200i
AP Applicant shall address all
areas where sharp and/or blind curves exist; realign all sections as necessary
to improve site lines.
Cond: 300
PEC approval shall not be not become valid for 20 days following the date of
approval.
Cond: CON0009331
The Applicant shall address concerns (widen and/or re-align trail sections)
/
' 1 ' D
regardirE,n"iln section nearest the vatl Memorial p"*ttt"ruccommodate
carts parking and blocklng the path.
Cond: CON0009332
The Applicant shall address all areas where sharp ard/or blind cr.rrves exist;
re.align all section as necessary to lmpro/e site lines.
Planner: Scot Hunn PEG Fee Paid: $400.00
DEarttnnt of C ommunity D eaelapment
75 Soath Fronuge Road
Vail, Cobrada 81657
970-479-21j8
FAX 970-479-2452
wuuaailgor.com
August 17,2OO7
Town of Vail
Department of Public Works
Aftn: Mr. Gregg Barrie
1309 Elkhorn Drive
Vail, CO 81657
Re: PEC07-0049 Gore Valley Trail Conditional Use Permit and Floodplain
Modification Request
Gregg,
On August 13,2007, the Town of Vail Planning and Environmental Commission
approved File No. PEC07-0049, specifically inclusive of a Conditional Use Permit to
construct new areas of paved, non-motorized bicycle paths and pedestrian ways within
the Natural Area Preservation (NAP) zone district, generally located within the Katsos
Ranch Open Space area, as well as a request for a Floodplain Modification to
accommodate and otherwise facilitate re-alignment and construction of certain portions
of the Gore Valley Trail within the l0Gyear floodplain for Gore Creek.
Discussion by the PEC focused on the following issues:
. Members expressed concern regarding ongoing and occasional conflicts created
near the Vail Memorial Park (section 13) whereas visitors to the park block the trail
with carts/shuttles; members suggested widening and/or re-aligning portions of the
trail at this pull off area to avoid any vehicles parking on the trail.
. Members encouraged the Applicant to address ALL sections of the trial where
alignment and grade result in 'blind" curves; the Commission suggested that each
such area be re-aligned slightly to improve lines of site and, therefore, public safety
and welfare.
Upon making their motion to approve the file, the Commission attached the following
conditions of approval:
1. The applicant shall address concerns (widen and/or re-align trial sections)
regarding the path section nearest the Vail Memorial Park to better
accommodate carts parking and blocking the path;
$REC|CLED PAPEE
I
2.The applicant shall all areas where sharp and/or blind curves exist; re-
align all sections necessary to improve site lines.
In addition. lwould be if I did not pass along concems expressed by the Town of
VailFire Marshall mile markers along the trail; if possible, please ensure that
any existing mile markers preserved and/or replaced if necessary during
construction. As well, if exist to place new markers along the path (if
needed), such actions be encouraged to maintain and enhance public safety,
specifically to ensure proper
in the future.
timely emergency response if necessary along the trail
Thank you for your in these matters. Pease contact me at (970) 477-3551
regarding this file, the PEC's actions or the conditionsyou have any further
listed above.
Resards, sb_
Scot Hunn
Senior Planner
FileCc:
7
-
TO:
FROM:
DATE:
SUBJECT:
MEIUORANDUM
Planning and Environmental Commission
Community Development Department
August 13,2007
A request for a final review of a Conditional Use Permit pursuant to
Section 12-8C-3, Conditional Uses, to allow for the repair, replacement
and realignment of an existing recreational path, as well as final review of
a Floodplain Modification, pursuant to Chapter 14-6, Grading Standards,
Vail Town Code, to allow for grading within the Gore Creek 100-year
floodplain, to repair and realign certain sections of existing recreational
path, located on an unplatted parcel of land directly east of Sunburst
Drive (a more complete location description is available at the Town of
Vail Department of Community Development). (PEC07-0049)
Applicant: Town of VailPlanner: Scot Hunn
il.
SUMMARY
The Applicant, Town of Vail, is requesting approval of a Conditional Use Permit;
pursuant to Section 12-8C-3, Conditional Uses, to allow for the repair,
replacement and realignment of an existing recreational path within unplatted
open space, generally located within the Katsos Ranch open space parcel in
East Vail, as identified on the Town of Vail Comprehensive Open Lands Plan. As
well, the Applicant is requesting approval for a Floodplain Modification, pursuant
to Chapter 14-6, Grading Standards, Vail Town Code, to allow for grading,
raising and/or re-alignment of certain sections of the Gore Valley Trial within the
100-year floodplain.
Based upon Staffs review of the criteria in Section Vl of this memorandum and
the evidence and testimony presented, the Community Development Department
recommends that the Planning and Environmental Commission approves, with
conditions, the requested Conditional Use Permit and requested Floodplain
Modification, subject to the findings noted in Section Vl of this memorandum.
DESCRIPTION OF REQUEST
The Applicant, Town of Vail (TOV), is requesting approval of a Conditional Use
Permit as well as a request for approval for Floodplain Modification, to allow for
repair, replacement and minor re-alignment of those portions of the Gore Valley
Trail (a.k.a. "Katgos Ranch Trail") running through the Katsos Ranch open space
parcel. A vicinity map has been attached for reference (Attachment A).
The Town of Vail Floodplain Coordinator has reviewed the proposal and has
determined that it conforms to the technical requirements of the Vail Town Code
(Attachment H).
7
ilt.BACKGROUND
History and Status of Trail
Those portions of the Gore Valley Trail running through the Katsos Ranch open
space parcel in East Vail were originally constructed in their current alignment
during the mid-1980's. The majority of this 2.2 mile segment of trail, generally
running along the Gore Creek basin between Sunburst Lane and Bighorn Road,
is located within the Natural Area Preservation (NAP) district, as described below
(in part):
"12-BC-1: PURPOSE:
The natural area preservation district is desrgned to provide areas which,
because of their environmentally sensitive nature or natural beauty, shall
be protected from encroachment by any building or other improvement,
other than those lisfed in section 12-8C-2. of this afticle. The natural area
preseruation district is intended to ensure that designated lands remain in
their natural state, including reclaimed areas, by protecting such areas
from development and preseruing open space. The natural area
preseruation district includes lands having valuable wildlife habitat,
exceptional aesthetic or flood control value, wetlands, rtparian areas
and areas with significant environmental constraints. Protecting
sensifve natural areas is important for maintaining water quality
and aguatic habitat, preserving wildlife habitat, flood control,
protecting view corridors, minimizing the risk from hazard areas, and
protecting the natural character of Vail which is so vital to the Town's
tourist economy. The intent shall not preclude improvement of the natural
environment by the removal of noxious weeds, deadfall where necessary
to protect public safety or similar compatible improvements."
Permitted uses in the NAP zone district include "Nature Preserves'; trails/recreaf,onal
paths are listed as conditional uses within the NAP zone district.
It should also be noted that certain portions of existing trail are situated within
'Sensitive Natural Habitat" and/or 'Floodplain/Riparian' areas identified on the
Hazard and Sensitive Area Map, contained within the Town of Vail
Comprehensive Open Lands Plan.
Since initial construction, the path has accommodated ever increasing levels of
use by residents and visitors, yet has required ongoing maintenance (patching
and overlays). The path is currently in a state of disrepair, due to unstable sub-
grades, deteriorating pavement, and occasional flooding of cerlain sections of the
path during spring runoff. Further, sections of the trail are located within the 100-
year floodplain, and subsequently within areas identified as "Sensitive Natural
Habitat" and/or "Floodplain/Riparian". For these reasons, the Town of Vail Public
Works Department proposes to make certain improvements to the trail during the
Iall of 2OO7.
Note:
Overview of lmprovements
lmprovements shown on plans generated by Marcin Engineering, LLC., dated
7l19ll7 (Attachment C), include grading, drainage and minor re-alignment work,
as well as full asphalt paving overlay. Specifically, work will include repair and
resurfacing of certain sections of paved trail, re-alignment and raising of others to
be more sensitive to the environment (wetlands, existing trees and floodplain
areas) and to improve certain areas where steep grades and/or sharply curved
sections present practical difficulties and/or safety concerns relative to line of
site. As well, plans call for removal of subgrade materials and replacement with
new subgrades and geotextile fabric in certain areas prone to flooding and/or
poor soils in order to reduce the need for ongoing, cosily maintenance.
Conditional Use Required
Due to the nature of certain improvements such as re-alignment of approximately
800 linear feet of the path (establishing new areas of paved, non-motorized
bicycle paths and pedestrian pathways within the Natural Area preservation
district), a Conditional Use Permit approval is required. There are generally two
primary sections of trail where re-alignments of trail will occur:
A. One area lies within section 4 of the attached plans (sheet 4) - re-alignment
of two steep switchbacks where existing average grade of the top switchback
exceeds 14%; the lower switchback exceeds 12%.
B. The other(s) areas are generally located within section 12 of the attached
plans (sheet 8) - re-alignment of approximately 420 linear feet of path along
an existing sewer line easement, to include approximately 230 feet proposed
to be removed in its entirety from the floodplain.*
Re-alignment and/or raising of the trail within section 12 (as shown on th€ attached plan
set) requires approval of Floodplain Modifications as this area is generally located within
lhe 1oo-year floodplain.
Floodplain Modification(s)
As well, due to limited grading, raising and/or re-alignment of certain portions of
path within the 100-year floodplain, approval for Floodplain Modiflcation is
required. These improvements generally occur within Section(s) 3, 7, and 12 as
depicted on the attached plan set. Of note is the fact that the Applicant proposes
to move approximately 230 linear feet of existing path entirely out of the
floodplain in section 12; this improvement coincides with a weilands mitigation
project being performed by the Eagle River Water and Sanitation District,
allowing for the restoration of over 5000 square feet of historical wefland in an
area that is prone to spring time runoff and flooding.
ROLES OF REVIEWING BODIES
Conditional Use Permit
Planninq and Environmental Commission:
The Planning and Environmental Commission is responsible for final approval,
approval with conditions, or denial of a Conditional Use Permit, pursuant to
Note:
tv.
V.
Title 12, Chapter 8, Article C - NaturalArea Preservation (NAP) District; Section
12-8C-3, Conditional Uses (in part):
12-8C-3: CONDITIONAL USES; The following uses sha// be permifted in the
NAP district, subject to the issuance of a conditional use permit in accordance
with the provisions of chapter 16 of this title:
Paved and unpaved, nonmotorized, bicycle paths and pedestrian walkways.
And; pursuant to Section 12-16-5, Conditional Use Permils - Planning and
Environmental Commission Action (in part):
A. POSS/BIE RANGE OF ACTIONS: Within thitty (30) days of the application for
a public hearing on a conditional use permit, ihe pitsnfiirn and elnvironmental
commission shall act on the application. The commission may approve the
application as submitted or may approve the application subject to such
modifications or conditions as rl deems necessaty to accomplish the purposes of
this title, or the commission may deny the application.
Floodplain Development Permit
Planninq and Environmental Commission:
The Planning and Environmental Commission is responsible for final approval,
approval with conditions, or denial of a Floodplain Modification, pursuant to
Chapter 14-6, Grading Standards - Floodplain Standards (in part):
14-6-6: FLOODPLAIN SIANDARDS: No grading is permitted in the 100-year
floodplain without planning and environmental commission approval.
APPLICABLE PLANNING DOCUMENTS
Town of Vail Zoninq Reoulaiions fiitle 12. Vail Town Code)
Chapter 8 - Open Space and Recreational Districts (in part):
12-8C-3: CONDITIONAL USES; The following uses sha// be permitted in the
NAP district, subject to the issuance of a conditional use permit in accordance
with the provisions of chapter 16 of this title:
Paved and unpaved, nonmotorized, bicycle paths and pedestrian walkways.
Chapter 16 - Conditional Use Permits (in part):
Secfion 12-1&1 : Purpose; Limitations
ln order to provide the flexibility necessary to achieve the objectives of this title,
specified uses are permitted in certain drsfncts subject to the granting of a
conditional use permit. Because of their unusual or special characteristics,
conditional uses require review so that they may be located properly with respect
to the purposes of this title and with respect to their effects on surrounding
properties. The review process prescribed in this chapter is intended fo assure
compatibility and harmonious development between conditional uses and
suffounding propefties in the Town at large. Uses fisted as conditional uses rn
the various districts may be permitted subject to such conditions and limitations
as fhe Town may prescribe to insure that the location and operation of the
conditional uses wil/ be in accordance with the development objectives of the
Town and will not be detrimental to other uses or properties. Where conditions
cannot be devised, to achieve these objectives, applications for conditional use
permits shall be denied.
Ghapter 21 -Hazard Regulations
SectiOn 12-21 -10E, HAZARD REGULATIONS, DEVELOPMENT RESTRICTED
(in part)
E. The Administrator may require any applicant or person desiing to modify the
flood plain by fill, construction, channelization, grading, or other similar changes,
to submit for review an environmental impact statement in accordance with
Chapter 12 of this Title, to esfab/rsh that the work wilt not adversely affect
adjacent propefties, or increase fhe quantity or velocity of flood waters.
Town of Vail Development Standards Handbook ffitle 14. Vail Town Code)
Chapter 14-6, GRADING STANDARDS (in part)
Floodplain Standards;
No grading is permitted in the 1l&year floodplain without Planning and
Environmental Commission approval. lf an applicanf wishes to grade into the
l0Gyear ftoodplain, an environmental impact report is required.' The
environmental impact repoft shall include impacts to vegetation, riparian areas,
appropriate hydraulic engineering calculations to show no increase in water
surface profile and velocity, as well as stating that there will be no adverse
impacts to adjacent properties. No permanent improvements shall be constructed
within 1' of the floodplain line.
The floodplain line shall be determined by a registered professional land surueyor
by plotting the appropriate elevation of the floodplain on a maximum 1"-20'
topographic 2' contour map using the adopted Town of Vail flood profiles (the
Federal Emergency Management Agency Flood lnsurance Study). The
topographic suNey shall reveal the method for determining the stafting point and
the stafting elevation for the floodplain delineation. A slfe specific study
pertormed by a Professional Engineer per FEMA guidelines and approved by the
Town of Vail and FEMA may be required.
The Applicant has provided written justification (Attachment H) prepared by the Town of
Vail Floodplain Coordinator stating reason why an Environmenlal lmpact Report will not
be required for purposes of review and approval of this Floodplain Modification
applicalion.
Nole:
Town of Vail Comprehensive Open Lands Plan
vt.CRITERIA AND FINDINGS
Gonditional Use Permit
Before acting on a conditional use permit application, the Planning and
Environmental Commission shall consider the following factors with respect to
the proposed use:
1. Relationship and impact of the use on the development
obiectives of the Town.
Staff believes the proposed conditional use permit is consistent with,
or has no impact upon, the development objectives of the Town.
2. The effect of the use on light and air, distribution of population,
transportation facilities, utilities, schools, parks and recreation
facilities, and other public facilities needs.
Staff believes that the proposed conditional use permit will have no
effect on the above criterion due to the lack of any negative
externalities. Rather, Staff suggests the proposed improvements will
have a positive effect by improving an important transportation and
recreational facility by improving safety, reducing ongoing
maintenance requirements and enhancing the natural environment
through reclamation and restoration of wetland habitat.
3. Effect upon traffic with particular reference to congestion,
automotive and pedestrian safety and convenience, traffic flow
and control, access, maneuverability, and removal of snow from
the street and parking areas.
Staff believes that the proposed improvement will have no effect on
automotive traffic, however pedestrian and bicycle traffic facilities (and
therefore safety and convenience) are improved. As well, pedestrian,
bicycle and Nordic traffic flow and control, access, maneuverability,
and removal (or grooming) of snow will be improved.
4. Effect upon the character of the area in which the proposed use
is to be located, including the scale and bulk of the proposed use
in relation to surrounding uses.
Staff believes the proposed conditional use permit will have no
negative effect upon the above criterion as the proposed
improvements and repair work coincide with existing uses of the site
and otherwise further the stated purpose of the Natural Area
Preservation zone district. Specifically, and in certain instances, the
proposed improvements and repairs will enhance the area by allowing
for the reclamation of over 5,000 square feet of wetland areas,
creation of more environmentally sensitive trail alignments elsewhere,
and the creation of generally improved aesthetics (improved shoulder
and asphalt overlay).
Floodplain ModificationA. The Plannino and Environmental Commission shall consider the followinq
criteria when reviewinq an application for a modification to the floodplain:
1, The proposed floodplain modification will not increase the
quantity or velocity of flood waters.
The Applicant is proposing to restore any areas previously disturbed
by the existing path to their natural topography and native vegetative
cover. In addition, any areas of natural topography and native
vegetation* disturbed in order to realign the path or install new
drainage culverts will be restored, so there will be no permanent
modification to the Gore Creek 100-year floodplain. Additionally,
in a report generated by River Restoration.Org,'lnc., dated July 10,
2007, (Attachment G), a finding is made or recommended that there
will be no adverse impacts to adjacent properties or measurable
increase in the quantity or velocity of flood waters.
The proposed floodplain modification will not adversely affect
adjacent properties.
The Applicant is proposing to restore any areas previously disturbed
by the existing path to their natural topography and native vegetative
cover. In addition, any areas of natural topography and native
vegetation* disturbed in order to realign the path or install new
drainage cufverts will be restored, so fhere will be no petrnanent
modification to the Gore Creek 100-year floodplain Additionally,
in a report generated by River Restoration.Org, Inc., dated July 10,
2007, (Attachment G), the finding is made or recommended that
there will be no adverse impacts to adjacent properties or
measurable increase in the quantity or velocity of flood waters.
Such other factors and criteria as the commission deems
applicable to the proposed variance.
The Town of Vail Floodplain Coordinator has determined that this
project does not significanlly change the environment and does not
require the submittal of an environmental impact repoft pursuant
to Section 12-12-2, Applicability, VailTown Code.
Generally, most areas proposed to be disturbed to accommodale new
alignments and/or revised grades have been previously disturbed and
cannot be categorized as natural or native.
The Planninq and Environmental Commission shall make the followinq
findinqs before approvinq a floodolain modification:
1. The proposed floodplain modification will not increase the quantity or
velocity of flood waters.
3.
Note:
B.
o
vil.
2. The proposed floodplain modification will not adversely affect adjacent
. propefties.
STAFF RECOMMENDATION
Conditional Use
The Community Development Department recommends that the Planning and
Environmental Commission approves, with conditions, a Conditional Use
Permit, pursuant to Section 12-8C-3, Conditional Uses, to allow for the repair,
replacement and re-alignment of an existing recreational path for the Gore Valley
Trail, and certain improvements thereto as specified in construction plans
prepared by Marcin Engineering, LLC, and dated7l19l07.
Should the Planning and Environmental Commission choose to approve this
request; the Community Development Department recommends the Commission
pass the following motion:
"The Planning and Environmental Commission approves the Conditional
Use Permit, to allow repair, replacement and re-alignment of cedain
poftions of the Gore Creek Trail within Town of Vail open space, and
setting forth details in regard thereto, subject to the following conditions:
1. Prior to construction, the applicant shall comply with the
requirements of all applicable local, state, and federal permits and
approvals.
2. Prior to construction, the Applicant shall ensure that any and all
,neasures are taken through proper site management and staging
coordination (staging, site fencing and access control/signage) as
to effectively protect the public's interest and immediate health and
wellbeing.
Should the Planning and Environmental Commission choose to approve this
request, the Community Development Department recommends the Commission
makes the following findings:
"The Planning and Environmental Commission finds:
1. The proposed conditional use permit r.s convsfen{ or has no
impact, with the development objectives of the Town.
2. The proposed conditional use permit will have no effect on the
above criterion due to the lack of any negative extemalities.
3. The proposed conditional use will have no negative effect upon
traffic with pafticular reference to congestion, automotive and
pedestrian safety and convenience, traffic flow and control, access,
maneuverability, and removal of snow from the street and parking
areas.
4. The proposed conditional use will have no negative effect upon the
charaeter of the area in which the proposed use r.s fo be located,
including the scale and bulk of the proposed use in relation to
sunounding uses."
Floodplain Modification
The Community Development Department recommends that the Planning and
Environmental Commission approves, with conditions, a Floodplain
Modification request, pursuant to Chapter 14-6, Grading Standards, Vail Town
Code, to allow for the minor grading within the 1O0-year floodplain of Gore Creek.
This recommendation is based upon the review of the criteria outlined in Section
Vl of this memorandum and the evidence and testimony presented.
Should the Planning and Environmental Commission choose to approve this
request; the Community Development Department recommends the Commission
pass the following motion:
'The Planning and Environmental Commission approves the Applicants'
request for floodplain modifications, pursuant to Chapter 14-6, Grading
Standards, Vail Town Code, to allow for minor grading within the 1ll-year
floodplain of Gore Creek, and setting forth details in regard thereto,
subject to the following conditions:
1. Prior to construction, the Applicant shall comply with the
requirements of all applicable local, state, and federal permits and
approvals.
2. Prior to construction, the Applicant shall coordinate all grading
associafed with this proposal with the Sfafe of Colorado Division of
Wildlife to ensure the protection of fish and other aquatic species.
3. Within 30 days of completion of the improvements/modifications
within the 100-year floodplain, the Applicant shall obtain Town of
Vail approval of an a*built suruey demonstrating that the l0Lyear
floodplain was modified in accordance with this approval.
Should the Planning and Environmental Commission choose to approve this
request, the Community Development Department recommends the Commission
makes the following findings:
"The Planning and Environmental Commission finds:
2. The proposed floodplain modification will not increase the quantity
or velocity of flood waters, based upon the analysis by the Town of
V ail Floodpl ain Coord i n ator.
3. The proposed floodplain modification will not adversely affect
adjacent propefties, based upon the analysis by the Town of Vail
F I oo d p I a i n Coord i n ato r.
5. The proposed floodplain modification will not have an atuerse
affect on the environment, based upon the analysis by the Town of
V ail Floodplain Coordinator. "
VIII. ATTACHMENTS
A. Vicinity Map
B. Applicant's Reguest
C. Engineering Drawings
D. Site Photographs
E. Wetlands Study prepared by Montane Environmental Solutions, Ltd.
G. Opinion of Floodplain lmpacts prepared by River Restoration.Org
H. Town of Vail Floodplain Coordinator Approvall. Public Notice
l0
Attachment A
ll
Attachment B
Memorandum
To: Town of Vail
Department of Community Development
From: Gregg Barrie
Town of Vail
Department of Public Works
RE: Katsos Ranch Trail lmprovements
Date: July 16, 2007
lntroduction
The Gore Valley Trail through the Katsos Ranch Open Space was originally constructed by
Town crews in the mid 1980's. Since then, only minor repairs have been made to the two mile
long path, and many sections are in disrepair due to unstable subgrades, deteriorating
pavement, and areas that tend to flood during spring runoff.
As part of ongoing recreation path maintenance, the Department of Public Works will be making
improvements to the Katsos Ranch Trail during the fall of 2007. The improvements include
grading, drainage, and minor alignment work, as well as a full asphalt paving overlay.
The proposed work requires two approvals from the Planning and Environmental Commission:
1. Approval for Floodplain Modifications for minor grading and paving within the 100 year
floodplain
2. A Conditional Use Permit for two minor realignments of the path
l. Floodplain Modifications
There are three sections of path where it will be required to perform minor grading work
in the 1OO-year floodplain based on the best available floodplain mapping from FEMA.
A. Section 3 of the Proposed lmprovements (Attachment 1) was constructed through a
low lying area with poor subgrade soils. The proposed work includes excavating 18"
below the existing path, installing soil stabilization fabric, and placing 18" of stable
subgrade material. The asphalt path will be replaced in its existing location and to
existing grade. No impacts to the floodplain will be made.
B. Section 7 of the Proposed lmprovements (Attachment 2) was constructed through a
low lying area with poor subgrade soils. The proposed work includes excavating 18"
below the existing path, installing soil stabilization fabric, and placing 24" of stable
subgrade material. This will result in a net elevation increase of 6" above the existing
grade for a distance of 275 linear feet of path.
C. Section 12 of the Proposed lmprovements (Aftachment 3) was constructed through a
low lying area. Portions of this section of trail are covered with water at various times
throughout the year and lhere are multiple factors influencing the proposed work.
The work for this section will require approval for both Floodplain Modiflcation and a
Conditional use for realignment. lt is discussed in more detail in Part lll.
ll. RealignmentWork
There are two proposed realignments of the trail:
A. Section 4 of the Proposed lmprovemenb (Attachment 4) shows the realignment of
two steep "switchbacks" in the trail. The existing average grade of the top
switchback exceeds 14Vo tor over 125 feet, while the steepest section of the lower
switchback exceeds 12o/o. ln addition, the radius of the upper switchback is very
tight for such a steep hill.
This work will significantly improve this difficult and potentially dangerous section of
the trail by lessening the upper and lower switchback grades to 8o/o and 12o/o
respectively, widening the upper radius to improve sight distance for bikers and the
golf carts that cross at this location, and repairing drainage problems that tend to
deposii sand and gravel on the path. lmpacts include disturbance to existing native
vegetation, however, distr.rrbed areas will be reseeded with native seed mixes and
monitored for weed control.
B. As noted in Part ll C, the improvements to Section 12 require two approvals. This is
discussed in Part lll below.
lll. Section 12 lmprovements
Background
Section 12 of the Proposed lmprovements (Attachment 3) includes grading, realignment,
and drainage work along approximately 800 linear feet of the trail in a tow lying area
west of the Vail Memorial Park. This section of trail is impacted by a wetland mitigation
project constructed by the Eagle River Water and Sanitation District (ERWS).
Traditionally, portions of this low lying area were flooded during only the highest spring
flows. However, due to the installation of diversion culverts as part of the mitigation
project, parts of the path are under water more than once per summer.
In addition, ERWS is proposing to construct a boulder weir upstream of the mitigation
area in order to divert more water for a longer duration into the area. Additional water
will be beneficial to the riparian area, but will have greater impacts to the recreation path.
Proposed Work
The Department of Public Works proposes to raise the elevation of the path and install
drainage structures to allow free flowing drainage throughout the site. In addition,
realigning approximately 420 linear feet of path along the existing sewer easement will
remove the path entirely from an area that is very difficult to drain, allowing the existing
path alignment to be restored to its original riparian condition.
Flood p I ai n Mod ifi cation s
The work includes raising the elevation of the path approxim ately 2{ for a distance of 75
linear feet. This requires the installation of short retaining walls and railings along each
side of the path and a culvert beneath the path to allow free flow of the water inundating
the area. Performing this work will spare seven (7) 6-18" healthy lodgepole pine trees.
Additional Floodplain Modifications include removal of the existing asphalt and base
material (for the proposed realignment) and replacing with topsoil and wetland plant
material. Grading to allow free flow of water is also required. Floodplain impacts are
discussed in the attached letter.
Conditionat lJse - Realignment
The realignment of 420 linear feet of path will perform several functions:a. Eliminates the need to raise the elevation of the existing path out of the free flowing
water area and the need to install three new culverts.b. Eliminates the major maintenance problem of rebuilding eroded path shouldersc. Protects the path from possible future inundation due to beaver activity in the area.
Numerous dams have been constructed across Gore Creek and throughout the
wetland mitigation area over the past several years.
d. Allows for the restoration of over 5000 square feet of historical wetland. (This will
also satisfy a cunent mitigation deficit that requires the Town of Vail to mitigate 500
square feet of wetland that was disturbed near Red Sandstone School as part of the
Middle Creek to Red Sandstone Bike Path Construction.)e. Raising the grade of the existing path requires additional square footage, impacting
existing riparian vegetation. (i.e. 12" up equals 24 to 36" out on each side)f. Realignment uses existing, previously disturbed sanitary sewer alignmentg. Relocates approximately 230 feet of path out of the 100 year floodplain
lV. Project lmpactsr The proposed work does not impact development objectives of the Town of Vailr There is no impact to light, air, distribution of population, utilities, schools, parks or
other public facilities. The work does improve an important transportation facility
and recreational facility by improving safety, reducing maintenance requirements,
and improving the natural environment.o There is no effect upon automotive traffic however pedestrian traffic facilities are
improved, There is no impact to control, access, maneuverability, or snow
removal activitiesr The proposed work coincides with the existing uses of the site. The work
improves the existing recreational opportunities and restores historical natural
amenities.
o
Conditional Use Permit
Application for Review by the
Planning and Environmental Commission
Department of Community Development
75 South Frontage Road, Vail, Colorado 81557
teli 970.479,2L28 f axt 970.47 9.2452
web: www.vailgov,com
General Information:
All projects requirlng Planning and Environmental Commission revie must receive approval
building permit application. Please refer to the submittal requirements for the particular
An application for PlannirE and Environmental Commission review cannot be accepted until all
is received by the Community Development Department. The project may also need to be reviewed by the Town
Council and/or tf|e Design Review Board.
Type ofApplicaUon and Fee:
d, Conaiuonat Use Permit
Ef Floodolain Modificationi Ptinoi Exlerior Alteratontr Major Eftenor Alteration! Development Plantr Amendrnent to a DeveloDment Plantr Zoning Code AmendmentE Variancetr Sign variance
tr Rezoning $1300tr Major Subdivision $f500tr Minor Subdivision $550! Exemption Plat $650tr Minor Amendrnent to an SDD $1000tr New Special Development District 96000tr Major Amendment to an SDD $6000tr Major Amendment to an SDD $f250
(no erterior modifications)
$6s0
$400
$6s0
$800
$1s00
$2s0
$1300
$s00
$200
a
tfov
oo
'(.4
location of the Proposal: Lot:_Block:_ Subdivision:
Physical Addrcss:
Zoningl
ilame(s) of Owner(s):
t'I o;.t^s c* Vr4r t-
Mailing Address:15 +. pc.,wan-aL Zo V)+.-C"I it*9'-l
Phone:
Owner(s) Signaturc(s):
Name of Applicant:-Tu.-t.t o+ {+tc- a) a-e'i- .;p }., <- tt- L+-),, o--l.( ->
feArPnR/7fEnlc, \\, l-. ll \Y/ l-. i-\- lili
JUL 1 6 2007 il llt't
;ubmlttino a u
thatT@ttfFtOF VAIL
Description of the Requesttll a-+ ^t-r,-,-t r*eex, 4oo' ai Twe extgtr,t,,. c,o az-
6 6ot l(contact Eagle co, Assessor at 970-328-8640 tur parcel no.)
Mailing Address:7.,
.1 ?a q)ct L33)
F :\cdelAFORMS\Permits\Planning\PEC\conditiona|-use'l 0-1 8-2006.doc Page I of 5
From:
To:
Date:
Subject:
Hl Scott,
I understand you will be the planner for the PEC application on the Katsos Blke path,
Attached is the draft version of the WeUand letter. I'll get you the signed version when I get back from
vacation on August 2,
Essentially' this project does not require notlfication ior the corp of engineers and we will simply need to fiollow
the regulations of Nationwide Permit 14, which is not a problem.
I'll give you a call when I get back so we c:tn discuss further.
Thanks,
GregS
Gregg Banie, ASLA
Landscape Architect
Town of Vail
ph:970-479-2337
faxl 970-479-2L66
email: gbanle@vailgov.om
Gregg Banie
Scot Hunn
0il23120071:00 PM
Katsos Bike Path
O ,o*n of Vail July 17,2007
Mr. Crregg Banie
Town of Vail, Public Works
1309 Elkhorn Drive
Vail, Colorado 81657
July 17,2007
SUBJECT:2007 VAIL BIKE PATFI IMPROVENIENTS- BIC HORN ROAD TO VAIL
MUNICIPAL COLF COURSE
Dear Gregg;
Montane Environmental Solutions, Ltd. has completed locating and evaluating potential wetland
concems associated with the proposed improvements to the East Vail bike path from Big Hom
Road to the Vail Municipal Golf Course. As you know, you identified areas where you believed
there might be wetland areas or waterways near specific work areas. On July 13 and 15,2007,
Montane investigated the areas and sequentially flagged the wetland boundaries with "Wetland
Delineation" pink flagging.
Most of the wetland areas parallel the bike path and are associated with the alluvial aquifer of
Gore Creek and augmented by groundwater from the surrounding steep slopes of East Vail. The
wetlands are dominated by willow shrubs (Sallr species) with a common understory of cow
parsnip (Heracleum lanatum), twinberry (Distigea involucrata) and Canada reedgrass
(C al amagr o s t is c anadensis).
Two wetland areas where culverts will be replaced are associated with tributaries to Gore Creek.
They are also dominated by willow shrubs with a slightly wetter understory of chiming bells
(Mertensia ciliata) and beaked sedge (Carex utriculata).
REGULATORY REQURIEMENTS
As you and I discussed, there will be no permanent filling of wetlands associated with the
improvements to the bike path. In addition, adequate silt fence and construction fence will be
installed and maintained during construction so that no temporary impacts or sediment runoff
affects wetland areas. We discussed having a representative of the Town or Montane present
when construction occurs near wetlands to ensure the above,
The U.S. Army Corps of Engineers would not be involved in the activities described above
because wetlands will not be affected. However, the two culverts within tributaries to Gore
Creek that will be replaced or extended will involve temporary impacts and will fall under Corps
jurisdiction and the 404 program.
As we discussed and consulted with Mark Gilfilan from the Corps, the work to the culverts
would fall under the Nationwide Permit program, either Nationwide Permit 3 - Maintenance or
Number 14 - Linear Transportation Projects. Regardless of which permit, the repairs and
replacement of the culverts and the associated temporary structures or fills required for the
repairs are authorized by these permits. In addition, with my understanding of the culvert work,
a pre-construction notification will not be required. To reiterate my understanding: riprap will
O ,o*n of Vail July 17, 2oo7
not be placed in the waterways; there will not be more than l/10 acre lost; and no flanges will be
placed in the waterway, potentially affecting adjacent wetland vegetation. These conditions
otherwise trigger the pre-construction notification requirement.
I have included copies of the permit summaries and their conditions. It is imperative that the
Town ensure its contractors are familiar with the conditions. In addition, I strongly recommend
a Town representative monitor the work daily, to affirm compliance with the permit conditions,
I will follow this letter with a letter to the Corps describing the work and its compliance with the
Nationwide permits. If you have any questions, please contact me at 970468-0450.
Sincerely,
Anna Higgins
MONTANE ENVIRONMENTAL SOLUTIONS. Ltd.
Aftachment D
Section 3: Floodplain Modification. Proposed work will result in no grade change to the
existing surface of the path. Work includes repairing sub-grade and replacing asphalt.
Section 7: Floodplain Modiflcation. Proposed work includes repairing sub-grade, raising
the path 6", and replacing asphalt. No floodplain impacts.
Section 4: Conditional Use Permit for realignment (above and below): Proposed work
will decrease steep grades, widen tight curves and sight distances, and improve drainage.
Section 12: Gonditional Use for realignment and Floodplain Modification. Proposed
alignment follows existing sanitary sewer alignment through previously disturbed vegetation.
Existing path alignment restored to native riparian and wetland conditions.
Section 12 continued: Realignmentwill remove path from 100 yearfloodplain, and allow
for natural drainage patterns for the Eagle River Water and Sanitation District wetland
mitiqation site.
Section 12 continued: Existing alignment shall be restored to match surrounding grades
and vegetation types including wetland, riparian, and upland species. The realignment will
eliminate flooding problems which reduces maintenance of pavement and shouldering due
to erosion.
Attachment E
ffi,flu N4IOINTAI.{E
ffit ENVIROI\TN4ItrNTAL soLu'lrtroNs, trrd.
Mr. Gregg Bartie
Town of Vail, Public \Vorla
1309 Elkhorn Drive
Vail' colorado 81657
Jury r7,2oo7
SUBJECT:2007 KATSOS RANCH TRATL TMpROVEMENTS
Dear Cregg;
l
Montane Environmental Solutions, Ltd. has completed locating and evaluating potential wetland
concerns associated with the proposed improvements to the East Vail b&e path from Big Horn
Road to the Vail Municipal Golf Course. As you know, you identified areas where you believed
there might be wetlano areas or waterways near specific work areas. On July 13 and 15,2007,
Montane investigated the areas and sequentially flagged the wetland boundaries with "\/etland
Delineation" pink flagging.
Most of the wetland areas parallel the bike path and are associaced with, the alluvial aquifer of
Gore Creek and augmented by groundwater from the surrounding steep slopes of East Vail. The
wetlands are dominated by willow shrubs (Salix species) with a common understory of cow parsnip
(Heracleum lanatum), t'winberry (Distigea involucrata) and Canada reedgrass (Calamagrostis canadznsis) ,
Two wetland areas where culverts will be replaced are associated with nibutaries to Gore Creek.
They are also dominated by willow shrubs with a slightly wefter understory of chiming bells
(Mertetxia ciliara) and beaked sedge (Carex utriculata).
REGUIATORY REQURIEMENTS
As you and I discussed, there will be no perrnanent filling of wetlands associated with the
improvements to the bike path. ln addition, adequate silt fence and consrruction fence will be
installed and maintained during construction so that no temporary impacts or sediment runoff
affects wetland areas. 'We discussed having a representative of the Town or Montane present when
construction occurs near wetlands to ensure the above.
The U.S. Army Corps of Engineers would not be involved in the activities described above because
wetlands will not be affected. However, the two culverts within tributaries to Gore Creek that will
be replaced or extended will involve temporary impacts and will fall und.er Corps jurisdiction and
the 404 program.
P.o. Bc-'x 281 'SLvenrrloRNL, CTTLCTRADo 80498 . Pr ronr (970) 468 0450. F,qx (970)262-2162
.4
As we discussed and'
fall under the Nationwide
14 - Linear TransPortation
'1i' , the culverts and the
. by-these Permits' ln adi
notification will not be tel
waterways; there will not
.' waterwaY' PotentiallY affec' precoirstnrctionnotificati
Town ensure its
Town representative mo
' I will fotlow this tetter
' Nationwidb permitsr If
t:
rSincerelY,
I
ii j
|'-
l
. li
!
I
Aftachment F
Julv 10.2007
Mr. TomKassmel
Town of Vail
75 S. Frontage Road,
Vail. CO 81657
(970) 479-223s
RE: East Vail 2007 Bike Path Enhancements, Opinion of Floodplain Irnpacts
Dear Tom.
Proposed Bike Path enhancements in East Vail include grading in the floodplain area.
This letter is an opinion of how the proposed modifications may affect the floodplain and
compliance with Town of Vail and Federal floodplain development guidelines.
TOY: 12-21-10: DEVELOPMENT RESTRICTED: (E) The Administrator may
require any applicant or person desiring to modify theflood plain byfill,
construction, channelization, Crad@, or other sirnilar changes, to submit for
review an environrnental impact statement in accordance with Chapter 12 of this
Title, to establish that the work will not adversely ffict adjacent properties, or
increase the quantity or velocity offlood waters. (Ord. I6(1953) S I: Ord.
12Qe78) S 4)
Effective Conditions
The feasibility of modifying the Bike Path grade wittrout increasing the Base Flood
Elevations (BFEs) has been waluated through l-dimensional step backwater modeling.
This analysis is based on a HEC-RAS floodplain model supplied by the Town of Vail.
The established floodplain geometry is "Lnported Geom 0lmbjrevised" and the
associated "100 Year Discharge" is the steady flow data.
An electronic contour map titled 'NewWorkmap.dwg", created Wednesday, March I l,
1998 4:19:42 PM and modified Thursday, June 05, 2003 l:35 12 PM was also provided
by the Torvn of Vail. This map represents the locations of River Stations used in the
hydraulic model. The map also represents tJre location of the bike path and has contours
supported with some spot elevation marks.. The map is reported to be on the 1988 NAVD
(TOV personal communications) and on the same elevation datum as the floodplain
model. Bridge low chords listed in the map correlated within 0.06 feet of the low chords
in the floodplain model, indicating no significant difference between elevation data.
A point survey " East Vail Path Survey Base Rev 06-07.dwg" modified *Friday, July 13,
2007 2:54.,33 PM'was also obtained from TOV staff. This survey is the anticipated
I of5
o
SprinSs. Coiondo 81602. (970) 94?-9568
basemap for the proposed project. The datum correlation ofthis survey with the
floodplain model is not exactly known; however data appear to be very close. Data from
the "survey'' are included herein for reference only. The project datum and floodplain
datum should be rectified prior to finalization of any floodplaia asd6ling.
Proposed Conditions
Three locatipns have been reviewed for potential floodplain impacts; Section 3, Section 7
and Section 12, as identified by TOV staff.
Section 3
Section 3 is between River Station 180 and 181.3, with no net grade change from River
Station 180 to approximately 50 feet upstream ofRiver Station 180.5. The bike path is
neaf,theleft(south)toeof slo'peatthislocation. A 1.5 inchoverlayisproposedfrom50
feet upstream of River Station I 80.5 to approximately I 85 feet downstrearn of River
Station 181.3. The Vail Golf Course Bridge is located adjacent to the middle of the'
proposed improvements, represented by River Station 180.8.
Overall the proposed modifications at Section 3 (based on the grading assumptions in
Table 1) are above the Base Flood Elevations and therefore, would not significantly
influence flooding or the floodplain. However, fuver Stations 180.5 and l8l show that
the Proposed bike path may be below the Energy Grade (E.G.) Elevation. During a 100-
year event, debris on the Bridge or a hydraulic jump downstream of the bridge may result
in conditions where the bike path could be submerged.
A sensitivity analyses was performed to evaluate a 12 feet wide by 1.5 inch increase in
grade throughout Section 3 left floodplain below the elevation ofthe Base Flood
Elevation. This analysis resulted in drops of0.03 feet ofbase flood elevation, indicating
that some influence on the floodplain may be incited if bike path grades are modified
below the elevatioD of the BFE in Table l. The impacts may be minor; however,
Conditions at Bike
River
Sta
o
Total BFE Survev
Model
Grade
Prpsd
Grade
E.G.
Elev
Delta
BFE NOTE:
181.3 1840 8268.03 8271.47 8271.50 8271.50 8269.76 0.00 Above the floodolain
181 1840 8265.34 8266.12 8265.50 8265.62 8266.21 0.00
Slightly above BFE, potential
submergence, no significant
influence
180.9 1840 82&f .80 8265.80 8266.49 8266.62 8265.87 0.00 Above the floodplain
180.8 Bridse Low Chord 8266.66 feet
180.7 1840 8263.60 8265.71 8266.49 8266.62 8265.57 0.00 Above the floodplain
180.5 1840 8263.17 Sgfi4iw 8264.00 8264.00 826i+.06 0.00
Slightly above BFE, potential
submergence, no signifi cant
influence
180 1840 8260.67 8263.00 8262.00 8262.00 8261.31 0.00 Above the floodplain
2of5
l23.Glenwood Slrihgn, C'obrado 11602. (970) rr4'l-956ii
additional analyses would be recommended if the bike path is modified at an elevation
below the Base Flood Elevations in Section 3.
RS 180.5 suwey data indicated that the improvements may be below the elevation of the
BFE. The Cross section was reviewed more indepth and it was found that the bike path
alignment is likely Ieft (south) of station 1036 in the cross section. Station I 036 has an
effective elevation greater than 8263.5. Therefore, proposed modifications below the
BFE at RS 180.5 will be absorbed by the conservative grade assumptions in the effecfive
floodplain model.
Section 7
Section 7 is between River Station 185 and 187, with a proposed 6 inch increase in grade
from approximately 20 feet upstream of RS I 85 to approximately 340 feet downstream of
RS 187. The bike path is located on a floodplain bench between the river and the left
(south) toe ofslope at this Section 7. A Vail GolfCourse Bridge is located adjacent to
the middle of the proposed improvements, represented by River Station 185.8. There is
no anticipated grading ofthe bike path bridge approaches.
Overall the proposed modifications at Section 7 (based on the grading assumptious in
Table 2) are below the Base Flood Elevations; however, River Stations 185.5, 185.7,
185.8 and 186.0 are modeled with ineffective flow areas covering the overbanks. The
area defined as ineffective will contain water but have no conveyance (the velocity is
assumed to be zero). Therefore, grading modifications in areas submerged by ineffective
flow will not have a modeled hydraulic influence on velocity or BFE. However, these
ineffective flow areas are not considered permanent and therefore grading that extends
above the ineffective flow elevation may have influence on the flood modeling. It should
be verified that grading does not extend above the ineffective flow elevations listed in
Table 2.
River Station 186.5 experiences significant backwater influence from the downsheam
golf course bridge constriction. The overbanks at 186.5 are not modeled with ineffective
flow; however the modeled cross section effective grade at 186.5 appears conservatively
high with an approximate elevation greater than 8287.7 feet for the left overbank. The
effective grade at River Station 186.0 is 8286.0 feet, which is 20 feet downstream ofRS
186.5. Assumingthebikepathwillhaveamaximumgrade of5percentatthislocation,
the effective grade at RS 186.5 is estimated to be 8287.0 feet and therefore the maximum
proposed grade elevation is assumed to be 8287.5 feet. Grade increases to elevations less
that 8287.7 feet will not be resolved in the floodway model and therefore will not have an
affect on BFE. If the bike path grades extend above 8287.7 feet near RS 186.5 further
floodplain modeling should be perfonned.
3 of5
IVE
Olenwolld Spings. C'olorado tl60?. (970) t"17-9J6il
Conditions at Bike Path Section 7
A sensitivity anal),ises was performed to evaluate a 12 feet wide by 6 inch increase in
grade throughout $ection 7 left floodplain below the elevation ofthe Base Flood
Elevation. This analysis resulted in no change to the base flood elevation, indicating that
the modeled ineff(ctive flow on the floodplain will submerge any bike path grades that
are modified belorlv the elevation of the BFE in Table 1. Additional analyses would be
recommended if the bike path is modified at an elevation above the BasdFlood
Elevations in Section 7.
Section 12
The bike path is lqcated on a floodplain bench between the river and the left (south) toe
of slope at this Se{tion 12. Circle K Park Bridge is located adjacent to Section 12
modification. Section 12 is between River Station 192 arrd 195, with a proposed 24 inch
increase in grade, 14 feet wide, from approximately 40 feet downsteam of RS 193 to
approximately l0 feet upstream of RS 193. A realignment of the Bike Path from
approximately 50 fleet downstream of RS 192 to approximately 180 feet upsfeam of RS
192. Also propos0d from 50 feet downstream ofRS 194 to the soutl abutrnent ofthe
Bridge is removing and replacing asphalt, but the final grades will match existing grades.
Overall the propo$ed modifications at Section 12 (based on the grading assumptions in
Table 3) are belo* the Ineffective Flow Elevations. River Stations 192 through 195 are
all modeled with ineffective flow areas covering the left (south) overbank. The area
def,rned as ineffecfive will contain water but have no conveyance (the velocity is assumed
to be zero). Therbfore, grading modifications in areas submerged by ineffective flow
will not have a modeled hydraulic influence on velocity or BFE. However, these
ineffective flow areas are not considered permanent and therefore grading that extends
above the ineffect[ve flow elevation may have influence on the flood modeling. It should
be verified that grbding does not extend above the ineffective flow elevations listed in
Table 3.
Elevated toe of slope
above BFE
Elevated toe of slope
above BFE
4 of5
l23.Gleni!o!rd Sprirls. Lolo'ado :it6l]2. (970) t4?-9J6.3
Summary
The floodplail model appears to have built in assumptions that are conservative for
predicting flooding. These assumptions include the use of ineffective flow and effective
model grades that are apparently higher than actual existing grades. It is my opinion that
the proposed grades, if constructed as disclosed herein, would not be resolved by the
effective floodplain model and therefore not change the Base Flood Elevations on Gore
Creek. We me available to develop a proposed conditions IIEC-RAS model for your
records.
It should be noted that the floodplain model (although conservative for flooding) does not
appear to be precise and may not represent actual flooding conditions. This cursory
analysis shows that the floodplain model may likely be adjusted with the proposed
conditions to show no increase in BFE and no need for the CLOMR/LOMR process.
However, under the condition that NFIP insured structures exist in the floodplain
adjacent to the proposed modifications, detailed analysis is recommended including
development of an existing conditions model to base the affects of the proposed
conditions upon.
Please contact me with any questions or comrnents.
Respectfully,
RT\iERRESTORATION.ORG. LLC.
'A,41
Jason Carey, P.E.
Principal
able 3.Conditions at Bike Path Section 12
River
Sta
o
Total BFE Survey
Model
Grade
Prpsd
Grade E.G. Elev
Delta
BFE NOTE:
195 1670 8337.65 N/A N/A N/A 8338.55 0.00
lneffective flow to
8340.25 ft
194.9 1670 8337.33 8337.85 8338.00 8338.00 8337.99 0.00 lneffective flow to 8340ft
194.8 Bridge
8342.10 (center of Br.
Low Chord)
194.7 1670 8337.16 8337.79 8336.00 8336.00 8337.88 0.00 lneffective flow to 8340ft
194.5 1670 8336.73 8336.28 8336.00 8336.00 8337.41 0.00 Ineffective flow to 8338ft
194 1670 8335.73 8335.58 8335.10 8335.10 8336.60 0.00 Ineffective flow to 8340ft
193 1670 8328.83 8327.76 8328.00 8330.00 8329.47 0.00 Inefiective flow to 8332ft
192 1670 8322.28 8322.30 8322.00 8322.OO 8323.12 0.00 Ineffec{ive flow to 8325ft
5 of 5
Attachment G
To: Scot Hunn, Planner
Department of Community Development
From: Tom Kassmel, P.E,
Town of Vall Engineer / Floodplaln Coordinator
RE: Katsos Ranch Trail lmprovemonts proJect
Date: July 16, 2007
Pursuant to section 12-12€ (A) and (c) of the Town of vail code, the Katsos Ranch rrail
lmprcvements Projeot will not require an Envirohmental lmpact Report (ElR) for the following
reasons:
r2'1L3: An etrvtronmental imtrtact report shall rct be rcryircdfor thefollowingprojects:
A. Alteration, repair and matntenance of uisting struchrres @td lite imprwements.
The lGtsos Ranch portlon of the Gore Valley Trall was origlnally constructed In the mid
1980's. The proposed urork would be considered alteralion, repair and maintenance
work to the existing recrea0on palh.
C. A project which, on the basis of a preliminary erwironrtennl assessmmt coveing
each ofthefacnrs prescribed in Section 12-12-2 ofthis ChapUr isfound to have ai
insig4ficant impact on the enironment. The preliminary erwironmentctl assessment and
thefi.nding on envirotmtental impact shall be nwde by the Adninistator, :
Through a preliminary environmental assessment of the items in secilon 12-12-2,lhe
Administrator has found that thls project will have insignificanl lmpact on ltems A, B, D, E,
M, N, and O. The remalnlng items, excepling lbm C; are not applicable to this project.
llem C, wirlch relates to altering or remoVing native grasses, lrees, shrubs, or other
vegetatlve cover, is addressed as follows: The realignment of Sectlon 4 impacts native
vegetation, hor'vever only lo a minimal extent, In addiUon, existlng pavement will be
removed and the area reseoded using a native seed mix. The amount of paved surface
increases insignificantly, The realignment of Sectlon 12 impacb a previously disturbed
sanitary.sewer easement, but replaces exisiing asphall wilh a weiland restoration,
In addition, after reviewlng the hydraulic report for the alterallons, lt is my opinion that th€
conslruction of this project will not adversely affect adlacent properties or increase the quantity or
veloclty of fl oodwaters,
Sincerely,*Ir, (r*-Sl=
Tom Kassmel
Town of Vail Engineer / Floodplain Coordinator
IV. ENVIRONMENTALIMPACTANALYSIS
f n accordance with Chapter 12-21-10, Town of Vail Code, staff and the project consultant have
completed an environmental impact analysis. The following criteria have been evaluated for
impacts from this proposal:
1. Hydrologic conditions, guch as surface drainage and watershed characteristics,
ground water and soil permeability characteristics, natural water features and
characteristics, and any potential changes or impac{s.
A floodplain impact analysis has been prepared by Hydrosphere for any regrading work in
the floodplain. The floodplain study (attached) concludes floodplain elevations along Gore
Creek will not be adversely impacted by the proposal.
2. Atmospheric conditions, such as airshed characteristics, potential emissions, and
any potential changes or impacts.
This proposal will not impact any atmospheric conditions in the area of Vail Mllage.
3. Geologic conditions, such as land forms, slope, soil characteristics, potential
hazards, and any potential changes or impacts.
This proposal is not located in any of the Town's identified geologically hazardous areas.
Only minor grading will occur with several sections of short boulder walls. No signiflcant
changes to existing landforms are proposed.
4. Biotic conditions, such as vegetative characteristics, wildlife habitats, and any
potential changes or impacts.
The vegetation along the path is a mixture of native riparian habitat, native facultative
upland, and previously disturbed utility easements. The minor path realignments will impact
some native vegetation, but mostly previously disturbed areas. However, any impacts will
also resull in the removal of asphalt from similar sized areas. These areas will be reseeded
with native seed mixes and monitored for weed control. Therefore, the result of the
realignments will be no net increase in paved area. ln addition, a 420 linear foot section of
path will be replanted as native riparian area.
Because the use of the area does not change, there will be no impacts to wildlife habitats.
5. Other environmental conditions, such as noise levets and odor characteristics, and
any potential changes or impacts.
With the exception of construction activities, the proposed improvements to the recreation
path system will have no impact on existing noise levels or odor characteristics.
6. Visual conditions, such as views and scenic values, and any potential changes,
impacts, or marked contrasts.
The Katsos Ranch Open Space is Vail's largest open space parcel. The recreation path
that runs through the property has little impact on the visual conditions. ln contrast, the
path creates opportunities for users to enjoy the surrounding mountain views and scenery.
The proposed improvements to the path will only enhance those opportunities.
7. Land use conditions, such as characteristics uses, compatibili$with officially
approved land use and open space policies and objectives, and potential changes or
impacts.
The Katsos Ranch Open Space has long been established as an area for recreational uses.
lmprovements to the path system will not alter the existing land use and are fully compatible
with the Natural Area Preservation District zoning.
8. Circulation and transportation conditions, such as volumes and traffic flow pafterns,
transit service needs, alternative transit systems, and potential changes or impacts.
lmprovements to the path will improve existing pedestrian, bicycle, and other non motorized
transportation routes.
9. Population characteristics, such as residential densities, neighborhood patterns,
potential displacement of residents or businesses, and potential changes or impacts.
This proposal will not impact or displace any of the existing densities, residents or
businesses within Vail.
Attachment C
f-CONSTRUCTION PLANSEAST VAIL BIKE PATH RECONSTRUCTIONEAGLE COUNTY, STATE OF COLORADOJULY, 2OO7
GENETAL NOTES
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s|lE PL N STA.45+50 TO 64+50
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PL N Ar'rD PRoF .! ST . 7+50 tO 13+25
PL N AND PRoFtt.E STA. 13+OO rO tE+75
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OETAT.S STIEEI
UTILITY CONTACTS'
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H,H,ti[gi'E* SECTION
l V lL-tgn6rv d,lT-64t4.0
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taotEst. foG @ sl^rnfiG Fm |s?l|ll? mva Afa nFuaaF{r B at'lma rE|gru& IOCAIX S n't E |lEtrrFE fl ll€ fE 0 A! TW RaPiESOltAIl\E
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r€crr (TrPl
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ff IHE G€orEOi||c[ aFfa ('?)
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L Il€ co|lRlgln 9|ar rl(E a! |PtneftArE tEt u|roE 10 90fEt fly iErc€ lttY PolEf|l LFcllr crrrstt ty ]t6 Aglt'tl:3 rc ocflt c|m c{al HAIE EarnEo FiocElfEs Fm t||f['.lGpolEan[ PouJrrtt{Ts lfo F^rE rE{tnEo sPir PnElgar(tr ^|-
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SECTION 13
EGn mrE lm iFLraE NPHAllst^ rr+s - sarcul llo ftrrcoglL AStt fr AT ,0fI-
PFIELIMINARYFOR CONSTRUCTION
SCILE
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(ftrri)lbt- ro t!
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H,H,ti[gi'E* SECTION
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SECTION 9
G$E ltu( ri.Ft
AT Ztrv (nP)tx rrrfs rounur t
r€crr (TrPl
60 FATotE Af5 f,CruCE A!|fiALT
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SECTION 11
ff IHE G€orEOi||c[ aFfa ('?)
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