HomeMy WebLinkAboutB14-0418_103 Rockledge Drainage Study & TOV Approval_1415748240.pdf Luiza Petrovska
From: Chad Salli[CSalli@vailgov.com]
Sent: Tuesday, September 16, 2014 11:35 AM
To: Luiza Petrovska
Subject: RE: 103 Rockledge Road Drainage Study
That works for me.
Thanks
Chad
Chad Salli, P.E.
Project Engineer
Department of Public Works
TOWN OF VAiL
1,Y
VF111 BEAVER CREEK
970.479.2169
970.376.2389 cell
vailgov.corn
vailbeavercreek2015.com
twitter.com/vailoov
From: Luiza Petrovska [mailto:luiza@ Fkpeng.com]
Sent: Wednesday, September 10, 2014 1:43 PM
To: Chad Salli
Subject: 103 Rockledge Road Drainage Study
Hi Chad,
Here is the drainage study. Let me know if it will work.
Thank you,
Luiza Petrovska, PE
LKP Engineering, Inc.
Civil/Geotechnical
275 Main Street, C-104
P.O. Box 2837
Edwards,CO 81632
Tel: 970-926-9088
1
1
Engineering, Inc.
- CIVIUGEOTECHNICAL
DRAINAGE STUDY
ROSENBACH RESIDENCE
103 Rockledge Road
Lot 4, Block 7, Vail Village Ist Filing
Town of Vail
Eagle County, Colorado
September 10, 2014
Project No. 14-2965
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Prepared for
K.H. Webb Architects,
710 West Lionshead Circle, Suite A
Vail, CO 81657
P.O. Box 2837, Edwards, CO 81632 970-926-9088
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TABLE OF CONTENTS
SCOPE OF STUDY -2-
INTRODUCTION -2-
RECORDS RESEARCH. -3-
DRAINAGE BASIN. -3-
DRAINAGE CRITERIA. -4-
FINDINGS AND RECOMMENDATIONS. -6-
LIMITATION. -6-
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LKP Engineering, Inc.
Page 2
SCOPE OF STUDY
This report presents the results of a limited drainage study, reviews of existing
documents and records, and analysis of the available information. The purpose of the study was
to evaluate the proposed conditions of the site with respect to the runoff from a 100-year storm
event, and to evaluate its effect on the capacity of the existing 15-inch culvert at the northeast
corner of Lot 5E at 126 E Forest Road.
INTRODUCTION
The site is located at 103 Rockledge Road, Lot 4, Block 7, Vail Village 15`Filing, Town
of Vail, Eagle County, Colorado. It is on the downhill side of the road. The topography of the
site is moderate to steep. The site was vacant at the time of our site visit. The vegetation
consisted of tall grass, flowers, and aspen trees with thick underbrush. There are residences to
the north, east and west of the property. On the south side is Rockledge Road and to the south of
Rockledge road are the Vail Ski Slopes.
LKP Engineering, Inc.
Page 3
RECORDS RESEARCH
For the drainage study we used the following resources:
1. Site plan by K.H. Webb Architects, dated September 5, 2014.
2. Landscaping Plan Ll, by Ceres+, Landscape Architecture, dated, August 21, 2014.
3. Rainfall intensity-duration-frequency curves for the Town of Vail area.
4. Town of Vail, Main Vail 2004 Storm Drain Improvements Report with an overall
drainage map and supporting calculations, emailed by Chad Salli, PE, project engineer
for the Town of Vail Public Works Department.
5. Field site reconnaissance.
DRAINAGE BASIN
The point of discharge, which is the area of concern for this report, is the 15-inch culvert at the
northeast corner of Basin#11, and as described above it is the northeast corner of Lot 5E at 126E
Forest Road. The above named report, Main Vail 2004 Drain Improvements is a study of the
existing conditions of the residential properties and the watershed above Rockledge, Forest and
Beaver Dam Roads. Basin#11 is about 1.55 acres and encompasses most of Lots 5E and 5W, the
subject Lot 4, and most of Lot 7. In addition the watershed from basin 7, which is 18 acres
watershed, according to the watershed map and the TOV drainage study, contributes to the
runoff of Basin 11. The subject watershed is within the Gore Creek Drainage basin. There were
no live streams of record running through the watershed. It appears that all of the drainage from
the Basins 7 and 11 is no longer directed to the collection point at basin 11.
The elevation difference from the southwest corner of Lot 4 to its northeast corner is about 40
feet. Approximately the south half of the lot has a moderate slope while the north half has a steep
LKP Engineering, Inc.
Page 4
slope. We understand that the proposed path of the runoff from Lot 4 will be routed toward the
northeast corner of the lot , to a catch basin, from where it will be piped to the collection point at
the northeast corner of Lot 5E, where there is an existing inlet with a 15-inch discharge culvert.
DRAINAGE CRITERIA
Based on the Town of Vail Study, the historic runoff from the 100-year storm event for Basin 11
is 0.61 cfs and the collective runoff from Basins 7 and 11 contributing to the 15-inch culvert
were calculated with the TR-55 drainage analysis to be 6.22 cfs.
For the calculations this drainage study we will be using the Rational method, for small
watershed of up to 200 acres. The design storm event analyzed was the 100-year storms. The
following formula was used to determine the peak discharge:
Q = CiA
Where:
Q = Peak discharge (cfs)
C =Runoff coefficient, a ratio of runoff to rainfall
1
I Average rainfall intensity for a duration equal to the time of concentration, for a selected
return period (in/hr)
A = Watershed drainage area(ac)
The rainfall intensity curves for Town of Vail, Eagle County, were used in the calculations.
Runoff coefficient of 0.65 was used in the calculations for a residential development in urban
areas with about 50% impervious surface and moderately steep. Following are the summary
results for the 100-year storm events:
Basin 11:
LKP Engineering, Inc.
Page 5
Basin 11 consists, more or less, of Lots 4, 5, 7, and 8. All of the lots, except Lot 4, are improved
with structures, driveways,hardscape and landscaping.
Area= 1.55 acres, i=5.7, C=0.65
Area of Lot 7 = 0.67 acres
Area of Lot 4 = 0.449 acres
The area of the basin minus Lot 4 = 1.101 acres.
Present Conditions:
Q= CiA= (0.65 x 5.7 x 1.101) + (0.3 x 5.7 x .449) =4.079 +0.768 =4.847 cfs
Lot 7, which is a part of Basin 11 was improved after the 2004 drainage study for the Town of
Vail and the discharge flow was rerouted by means of lift stations to the south side of Rockledge
Road.
Area of Lot 7 = 0.67 acres
Qlot7= 0.65 x 5.7 x 0.67 =2.482 cfs
The proposed improvement of Lot 4 (the subject property) will consist of 0.229 acres impervious
surface and 0.220 pervious.
Q=CiA
Qlot4= (0.65 x 5.7 x .229) + (0.3 x 5.7 x 0.220) = 0.848 +0.3762 cfs = 1.224 cfs
Net flow to the collection discharge point at basin 11, the I5-inch culvert, is:
Qdeveloped= 4.847 cfs - 2.482 cfs + 1.224 cfs = 3.579 cfs
LKP Engineering, Inc.
Page 6
FINDINGS AND RECOMMENDATIONS
The calculated net flow of 3.579 cfs for the 100-year storm event is a reduction from the existing
drainage conditions. Based on the drainage study, the flow to the existing 15-inch culvert will
not be increased with the development of Lot 4.
LIMITATION
The above report has been prepared for the exclusive use of K.H. Webb Architects, for the
proposed residential development for Lot 4, 103 Rockledge Road, Town of Vail, Eagle County,
Colorado. The study is limited to the information provided and the data available at the time of
our study.
This report has been prepared according to locally accepted professional engineering standards
at this time. There is no other warranty either expressed or implied.
If you have any questions, please do not hesitate to call.
Sincerely,
LKP Engineering, Inc. „,,‘"c.)0
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Luiza Petrovska, P.E.
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LKP Engineering, Inc.
DRAINAGE EASEMENT AGREEMENT
This DRAINAGE EASEMENT AGREEMENT (the "Agreement") is entered into this
day of October, 2014 by and between MARY ANN READ, TRUSTEE OF THE MARY
ANN READ QUALIFIED PERSONAL RESIDENCE TRUST DATED JUNE 22, 2009-and
STEVEN M. READ, TRUSTEE OF THE STEVEN M. READ QUALIFIED PERSONAL
RESIDENCE TRUST DATED JUNE 22, 2009, having an address of 4100 Happy Valley
Road, Lafayette, CA 94549, ("Grantor"); and GARY ROSENBACH and SUSAN
ROSENBACH, having an address of c/o Sarah J. Baker PC, PO Box 425, Edwards, CO 81632
("Grantee").
RECITALS
A. WHEREAS, Grantor owns certain real property located in Eagle County,
Colorado legally described as:
Lot 5E, Vail Village, First Filing, Block 7, a resubdivision of Lot 5, Lot 5E,
according to the plat recorded January 30, 1997 in Book 717 at Page 312, County
of Eagle, State of Colorado
("Grantor Property").
B. WHEREAS Grantee owns certain real property adjacent to Grantor Property also
located in Eagle County, Colorado and legally described as:
Lot 4, Vail Village First Filing, a Resubdivision of Lots 4 and 7, Block 7,
according to the plat recorded April 13, 2007 as Reception No. 200709527,
County of Eagle, State of Colorado
("Grantee Property").
C. WHEREAS, Grantee desires to acquire an easement for the purpose of the
maintenance of a drainage pipe and appurtenant drainage facilities ("Drainage Improvements")
on and through the Easement Area(defined below).
D. WHEREAS, Grantor is willing to grant an easement to Grantee for the aforesaid
purposes on the terms and conditions set forth herein.
AGREEMENT
NOW, THEREFORE, in consideration of TEN AND NO/100 DOLLARS ($10.00) and
other good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, Grantor does hereby grant and convey to Grantee an easement across the
Grantor's Property on the terms and conditions set forth herein:
1. Grant of Drainage Easement. Grantor does hereby-b grant and conveyunto Grantee
I i
a perpetual, nonexclusive easement (the "Easement") under and through the easterly ten (10)
feet of Grantor's Property (the "Easement Area") as depicted on Exhibit A attached hereto and
incorporated herein, for the purpose of providing the operation and maintenance of the Drainage
Improvements. Grantee shall also have the specific rights of ingress and egress for the
construction, reconstruction, operation and maintenance of the Drainage Improvements,
consistent with the Easement provided herein.
2. Reservation by Grantor, Non-Exclusive Use. All right, title and interest in and to
the Easement Area under this Agreement which may be used and enjoyed without interfering
with the rights conveyed by this Agreement are reserved to Grantor; provided, however, that
Grantor shall not erect or maintain any structures which may cause damage to or interfere with
the Drainage Improvements to be placed by Grantee within the Easement Area or develop,
landscape, or beautify any portion of the Easement Area in any way which would unreasonably
or materially increase the costs to Grantee of installing or maintaining the Drainage
Improvements.
3. Term. The term of the Easement shall be perpetual.
4. Operation and Maintenance
a) Grantee's Responsibility. The cost, operation and maintenance of the
Drainage improvements located within the Easement Area shall be the responsibility of the
Grantee; provided, however, that Grantor shall have the right to maintain the Easement Area in
the event Grantor, in its reasonable discretion, determines to enter the Easement Area for the
operation and/or maintenance of the Easement Area as set forth in subsection 4.b below.
b) Grantor's Right to Maintain. If Grantee fails to adequately maintain the
Drainage Improvements located within the Easement Area, and within fourteen (14) days after
the date of written notice from Grantor, fails to correct the maintenance problem or fails to begin
to clean, cure or correct such problem within fourteen (14) days if such problem cannot be
reasonably cleaned, cured or corrected within fourteen (14) days, and fails to diligently prosecute
such cleaning, cure or correction to completion, then Grantor may do so as provided herein.
Notwithstanding the foregoing, Grantor may, in the event of an emergency, as determined by
Grantor in its reasonable discretion, clean, cure or correct any damage caused by Grantee's
failure to adequately maintain the Drainage Improvements located within the Easement Area.
The Grantee shall reimburse the Grantor for the actual, reasonable cost of such maintenance.
c) Restoration. In the event the surface of any portion of the Easement Area
is disturbed by Grantee's exercise of any of its rights under this Agreement, Grantee shall restore
such area to the condition in which it existed at the commencement of such activities.
5. Covenant Running With the Land. The burdens and benefits of this Agreement
shall be deemed covenants running with said easements and said land. The rights, benefits and
burdens arising hereunder shall be transferred, assigned or conveyed with the Grantor Property
and the Grantee Property, but in no event shall any interest in the Easement or any of the rights,
benefits or burdens arising hereunder be conveyed or assigned separate or apart from the Grantor
Property or the Grantee Property. Upon the transfer of the Grantor Property by the Grantor, or
upon the transfer of the Grantee Property by Grantee, or by any future owner of the Grantor
Property or the Grantee Property, the liability for performance under this Agreement shall be the
obligation of said transferee and any prior owners shall be relieved of any liability in conjunction
with the future undertakings described herein.
6. Covenants of Grantee, Grantee hereby represents, covenants and warrants in favor
of Grantor, and its successors and assigns, that Grantee shall protect the Easement Area, and the
adjacent lands of Grantor over which Grantee has rights of ingress and egress, from damage
caused, in whole or in part, by acts or omissions of Grantee, its employees, agents, contractors,
subcontractors, assigns, lessees, licensees and agents.
7. Effective Date. This Agreement shall be effective upon the date it is executed by
an authorized representative of each signing party.
8. Enforcement: Attorneys' Fees. In the event that any party benefitted by this
Agreement is required to commence any action or proceeding against the other in order to
enforce the provisions hereof, or defend any such action, the prevailing party in any such action
shall be entitled to recover, in addition to any monetary damages or injunctive or other equitable
relief otherwise awarded, all reasonable costs incurred in connection therewith, including
attorneys' fees and court costs.
9. Modification; Termination. This Agreement may not be modified, terminated or
otherwise amended without the written consent of Grantor and Grantee (or their respective
successors or assigns).
10. Colorado Law. This Agreement shall be governed by and construed in
accordance with Colorado law. The parties hereto (on behalf of themselves and their respective
successors and assigns) hereby consent to the jurisdiction and venue of all state courts located in
Eagle County, Colorado with respect to all disputes and other matters arising under or in
conjunction with this Agreement and waive any objection they might otherwise have to such
jurisdiction and venue.
11. As-Built Drawings. Upon Grantor request, Grantee shall provide Grantor with
any as-built drawings that may exist showing the location and depth of the Drainage
Improvements installed in the Easement Area.
12. Headings. The headings in this Agreement are for convenience only, shall in no
way define or limit the scope or content of this Agreement, and shall not be considered in any
construction or interpretation of this Agreement or any part hereof.
13. No Partnership. Nothing in this Agreement shall be construed to make the parties
partners or joint venturers or render any of the parties liable for the debts or obligations of any
other parties.
14. Non-Terminable Agreement. No breach of the provisions of this Agreement shall
3
6
entitled any party to cancel, rescind or otherwise terminate this Agreement, but such limitation
shall not affect, in any manner, any other rights or remedies which any party may have hereunder
by reason of any breach of the provisions of this Agreement.
15. Further Cooperation. Each of the signatures to this Agreement agree to execute
such other documents and to perforin such other acts as may be reasonably necessary or
desirable to further the expressed and intent purpose of this agreement.
16. Counterparts. This Agreement may be executed in counterparts which when
taken together shall constitute the entire agreement of the parties.
17. Recording. This Agreement shall be recorded with the Eagle County Clerk and
Recorder by Grantee, at Grantee's sole cost and expense.
[Signatures follow]
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GRANTOR:
MARY ANN READ QUALIFIED STEVEN M. READ QUALIFIED
PERSONAL RESIDENCE TRUST DATED PERSONAL RESIDENCE TRUST D.TED
JUNE 22, 2009 009
*AA
By: "Oilc\A/11(..Re5Y32-- Of.aidif
Mary Ann Read, Trustee Steven'. she~s NOV
ANNE REGIN
��1 comm. #1944556
STATE OFL i, ) tArift,Te %tory Pubiic-California el
} SS. '� Alameda County
County of 4 - - --- COMM. �'ras Jul 17,2015
The foregoing instrument was acknowledged before me on this 23 day of October,
2014 by MARY ANN READ, TRUSTEE OF THE MARY ANN READ QUALIFIED
PERSONAL RESIDENCE TRUST DATED JUNE 22, 2009.
My commission expires: / 1-S
Notary Public
STATE 01(�.�,- �a c ) ANNE REM
o COMM. #1944556
) SS. xy Notary Public•California
County o z Alameda County °
M Comm.Ex.fires Jul 17,X15
The foregoing instrument was acknowledged before me on this 7 day of October,
2014 by STEVEN M. READ, TRUS 1'EE OF THE STEVEN M. READ QUALIFIED
PERSONAL RESIDENCE TRUST DATED JUNE 22, 2009.
My commission expires: 7
Notary Pub1iq!/
5
GRANTEE:
GARY ROSENBACH SUSAN ROSENBACH
STATE OF COLORADO )
) SS.
County of Eagle )
The foregoing instrument was acknowledged before me on this day of October,
2014 by GARY ROSENBACH.
My commission expires:
Notary Public
STATE OF COLORADO )
) SS.
County of Eagle )
The foregoing instrument was acknowledged before me on this day of October,
2014 by SUSAN ROSENBACH.
My commission expires:
Notary Public
6
EXHIBIT A
'EASEMENT DESCRIPTION
That part of Lot 5E, Vail Vi1(age, r'irst Filing, Block 7, A Resubdivision of Lot 5, Lot 5E,
according to the mop thereof recorded in the office of the Eagle County, Colorado, Clerk
and Recorder, described as follows:
The easterly 10 feet of said Lot 5E.
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