HomeMy WebLinkAboutDRB18-0345_approved documents_1533937876.pdfACTION FORM
Design Review Board (DRB)
Department of Community Development
75 South Frontage Road West
Vail, CO 81657
Tel: 970-479-2139
www.vailgov.com
Project Name: Vail Nature Center 2018 Application Number: DRB18-0345
Application Type: Exterior Alteration Date Applied: 07/24/2018
Project Description:
The town will be constructing an accessible fishing and education platform out of
siloam stone and performing riparian vegetation enhancement along Gore Creek.
This work is partially funded by a Colorado Parks and Wildlife "Fishing is Fun"
grant.
CONTACTS
Contact Type: Applicant
Full Name: Town of Vail (Peter Wadden)
Address: 75 South Frontage Rd. West Vail, CO 81645 Phone: 9704792144
Contact Type: Property Owner
Full Name: TOWN OF VAIL FINANCE DEPT
Address: Phone: None
Project Address: 841 VAIL VALLEY DR (210108100002) (210108100002)
Job Site Location:
Legal Description: Subdivision:UNPLATTED - FORD PARK
NATURE CENTER Lot: No Data Block:No
Data
Parcel Number: 210108100002
BOARDS/STAFF ACTION
Motion By: Action: Staff Approved
Second By:
Vote: Date: 08/10/2018
Conditions:
- Approval of this project shall lapse and become void one (1) year following the date of final approval, unless
a building permit is issued and construction is commenced and is diligently pursued toward completion.
- Design Review Board approval shall not become valid for 20 days following the date of approval, pursuant
to the Vail Town Code, Chapter 12-3-3 Appeals.
- No changes to these plans maybe made without the written consent of Town of Vail staff and/or the
appropriate review committee(s).
Planner: Chris Neubecker
PO Box 248 Carbondale, CO 81623 (970) 947-9568
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July 17, 2018
Thomas Kassmel, PE
Town of Vail
Department of Public Works
Town Engineer
1309 Elkhorn Drive
Vail, CO 81632
Phone 970-479-2235
RE: Vail Nature Center Fishing Access, Floodplain Compliance
Dear Tom,
RiverRestoration has been working with the Town of Vail on the proposed fishing access
located near the Vail Nature Center, on the south bank of Gore Creek and located
approximatively 260 feet upstream of the Gerald R Ford Amphitheatre pedestrian bridge.
The proposed fishing access encroachment has been designed to convey future flooding
events up to the 100 year flood event without increasing proposed effective modeled
Water Surface Elevation (WSE) above the modeled effective Base Flood Elevations
(BFE). This letter describes how the proposed project complies with the Town of Vail
and Federal Floodplain development guidelines.
TOV: 12-21-10: DEVELOPMENT RESTRICTED: (E) The Administrator may
require any applicant or person desiring 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 establish that the work will not adversely affect adjacent properties, or
increase the quantity or velocity of flood waters. (Ord. 16(1983) § 1: Ord.
12(1978) § 4)
Hydrology
No additional hydrologic investigation was performed as part of this analysis. Hydrologic
input to the hydraulic models was taken from the Eagle County Federal Insurance Study
(FIS). No significant hydrologic development has occurred in the Gore Creek watershed
upstream of the project since the most recent FIS was published. At this location a 100-
year discharge of 1,930 cubic feet per second (cfs) was used to calculate water surface
elevations through the Project reach for existing and proposed conditions.
PO Box 248 Carbondale, CO 81623 (970) 947-9568
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Existing Conditions
The Effective HEC-RAS model for Gore Creek was obtained from the Town of Vail.
This model contains the geometry from the most current FEMA flood model for Gore
Creek within the project reach.
Additional topographic survey information (bank only) provided by Peak Land
Consultants (March 28th, 2018) was compared to the Effective HEC-RAS model
topographic data. Most recent survey elevation values match the Effective model
topographic inputs at FEMA cross section 163. Therefore no additional cross sections
were added to the Effective model in the immediate vicinity of the proposed bank work.
As a result, no Corrected Effective model has been developed.
See Figure 1 for the existing 100-year limits of inundation and cross sections location.
Proposed Conditions
A Proposed Effective model was developed by modifying the Effective model to
represent the bank under proposed conditions.
To demonstrate compliance with Town of Vail and Federal floodplain development
guidelines, 100-year flood elevations calculated from the Proposed Effective model were
compared to the Effective BFEs published by FEMA. The calculated proposed 100-year
water surface elevations are equal to Effective values. See Table 1 and Figure 2 for a
tabular and graphical comparison of these water surface elevations.
Table 1 Base Flood Elevation Comparison- 100-year Flood Elevations (1.930 cfs)
FEMA
Cross
Section
Effective
Model BFE
(feet)
Proposed
Effective Model
BFE (feet)
Modeled Difference
Between Proposed
Effective Model and
Effective Model
(feet)
Finished Floor
Elevations or Lowest
Adjacent Ground
(feet)
166 8201.02 8201.02 0.00 8240.00
165 8197.15 8197.15 0.00 8244.00
164 8191.25 8191.25 0.00 8239.00
163 8189.08 8189.08 0.00 8198.60
162 8181.10 8181.10 0.00 8205.40
PO Box 248 Carbondale, CO 81623 (970) 947-9568
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Figure 1: Vail Nature Center Fishing Access –100-year Water Surface Inundation Limits and Cross Section Location
PO Box 248 Carbondale, CO 81623 (970) 947-9568
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Figure 2: Vail Nature Center Fishing Access – 100-year Water Surface Profile Comparison
Gerald R Ford
Pedestrian Bridge
FEMA CS - 162
FEMA CS - 166FEMA CS - 165
FEMA CS - 163
FEMA CS - 164