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WSP10311
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Last modified
1/26/2010 2:58:15 PM
Creation date
10/12/2006 4:15:54 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8200.765
Description
White River General
State
CO
Basin
Yampa/White
Water Division
6
Date
11/1/1980
Author
Utah Div of Water Re
Title
White River Dam Project - Proposed Action Plan
Water Supply Pro - Doc Type
Report/Study
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<br />nn'?171 <br />",J..,.._ <br /> <br />X. ENVIRONMENTAL IMPACT MITIGATION <br /> <br />A. Revegetation <br /> <br />It is anticipated that most of the borrow materials except riprap will <br /> <br /> <br />be removed from below the reservoir high water line. In the event some material <br /> <br /> <br />is removed from above the high water line or areas outside the reservoir, the <br /> <br /> <br />borrow areas will be shaped to drain and blend in with the surrounding topography. <br /> <br /> <br />They will also be seeded with natural cover to prevent erosion. The auxiliary <br /> <br /> <br />spillway will also be shaped and blended into the surrounding topography and <br /> <br /> <br />planted for erosion control except in bedrock areas. <br /> <br />B. Reservoir Fish Habitat <br /> <br />It is not anticipated that fish screens will be installed on the diverting <br /> <br /> <br />and pumping facilities in the reservoir area. Intake velocities into the trashracks <br /> <br /> <br />for the outlet works and for the pumping facilities will normally be maintained at <br /> <br /> <br />less than 2 feet per second. Velocities will be negligible only a few feet away <br /> <br /> <br />from the intake areas and fish should easily be able to escape from them. <br /> <br />The discharge from the reservoir outlet works into the river below the <br /> <br /> <br />dam will be through a cone dispersing type valve. These valves create a conical <br /> <br /> <br />spray of water which discharges into the atmosphere creating a high degree of <br /> <br />aeration as well as energy dissipation. This method of discharge control should <br /> <br /> <br />help to increase dissolved oxygen to optimum levels for fish survival. <br /> <br />No provisions have been made for fish passage around the dam during <br /> <br /> <br />construction or after completion of the dam. The endangered Colorado Squawfish <br /> <br /> <br />has been found in White River near the mouth and a few above the reservoir site <br /> <br /> <br />in Colorado. It is not known at this time whether these fish migrate up the <br /> <br /> <br />river to spawn. So far none have been captured or observed in the potential <br /> <br /> <br />reservoir basin reach of the stream. Additional surveys are in progress with <br /> <br /> <br />sampling conducted in April, May and June 1979. <br /> <br />C. Fugitive Dust Control <br /> <br />Dust is not expected to be a problem during construction of the project. <br /> <br /> <br />The borrow areas and embankment will be maintained at high moisture content to <br /> <br /> <br />achieve desired compaction. The moist soil is not subject to formation of dust. <br /> <br /> <br />All haul roads will be sprinkled at regular intervals to keep dust to an <br /> <br /> <br />acceptable level. <br /> <br />- 43 - <br /> <br />
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