My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP12360
CWCB
>
Water Supply Protection
>
Backfile
>
12000-12999
>
WSP12360
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/26/2010 4:14:45 PM
Creation date
10/12/2006 5:33:41 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8040.960
Description
Section D General Studies - Dams
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
4/11/2003
Author
Denver Water
Title
Williams Fork Hydroelectric Project - FERC Number 2204 - Scoping Document 1 - For the Relicensing of the Williams Fork Reservoir Hydroelectric Project
Water Supply Pro - Doc Type
Report/Study
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
23
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />0019u6 <br /> <br />Scoping Document I <br />Williams Fork Hydroelectric Project <br />FERC Project No. 2204 <br /> <br />4.1.1 Existing Project <br /> <br />The original 100-foot-high concrete gravity arch dam and the resulting water <br />supply reservoir were completed and put to use in 1941. In 1956, the newer <br />concrete thin arch dam was started and completed in 1959 to a height of 209 feet <br />with a crest length of 670 feet and a dam crest width of 10 feet at elevation 7,814 <br />feet. In addition to the concrete gravity arch dam, a 2,000-foot long earth dam <br />(known as the west dike) closes off a low saddle on the west side of the reservoir. <br /> <br />Williams Fork Reservoir stores 96.822 acre-feet of water at the top of the spillway <br />gate elevation of 7.811 feet with a maximum surface area of approximately 1.628 <br />acres. The reservoir has approximately 15 miles of shoreline at elevation 7,811 <br />feet. <br /> <br />Two separate intakes. one for the powerhouse penstock and one for the river <br />outlet works, are used at Williams Fork Dam. A reinforced concrete penstock <br />intake on the face of the dam is protected by steel, vertical-bar, multi-panel <br />trashracks. A 7 foot x 5 foot fixed wheel penstock gate releases water into a 66- <br />inch diameter steel penstock that extends from the intake down to the <br />powerhouse. A 66-inch butterfly valve is scheduled for installation in 2002 on the <br />penstock just upstream of the powerhouse. The fixed wheel gate is hydraulically <br />operated from the crest of the dam. The butterfly valve is electrically actuated <br />and locally operated. <br /> <br />The river outlet works intake. also on the face of the dam. is protected by a steel <br />vertical-bar trashrack and is provided with a vertically positioned slide gate. A <br />54-inch diameter steel embedded pipe conveys water to the outlet works valves. <br />Outlet releases are controlled at the downstream face by a 54-inch pivot valve; <br />24-inch and 36-inch cone guard valves on a wye branch; and two 30-inch hollow <br />jet regulating valves. <br /> <br />Power plant production capacity is 3.15 MW. The turbine/generator is a vertical <br />Francis turbine, operating off of a self-contained penstock that runs through the <br />dam. The unit is controlled with a Woodward gate shaft type governor operating <br />with a hydraulic oil pump system. <br /> <br />The energy produced by the Project is transmitted for 2 miles to the Bureau's line <br />between the Green Mountain Reservoir power plant and the Granby pump station. <br />Initially, the entire output of hydroelectric power generated at the Williams Fork <br />Dam was used to repay the Bureau for loss of power production at Green <br />Mountain Reservoir. caused by Denver Water's out of priority diversions on the <br />Blue River. Denver Water currently uses "banked" power generated by the <br />Project to compensate the Bureau for power interference. In 1990, Denver Water <br />began selling the excess power generated by the Project to Tri-State Generation <br />and Transmission Association, Inc. A portion of the power is used for on-site <br />station service requirements. <br /> <br />II <br />
The URL can be used to link to this page
Your browser does not support the video tag.