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Last modified
1/25/2010 7:14:53 PM
Creation date
10/5/2006 3:43:32 AM
Metadata
Fields
Template:
Floodplain Documents
County
Ouray
Community
Ouray
Stream Name
Uncompahgre River
Basin
Gunnison
Title
Draft Environmental Assessment Ridgway Dam and Reservoir Water Control Manual
Date
4/1/1996
Prepared For
State of Colorado
Prepared By
US Army Corps of Engineers
Floodplain - Doc Type
Project
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<br /> <br />. <br /> <br />. <br /> <br />Table 1. <br /> <br />Monthly Comparison of StreamOows Below Ridgway Dam <br />With and Without Flood Control Operations <br /> <br />. <br /> <br /> AVERAGE DAILY STREAMFLOWS <br /> (cfs) <br />Month With Project" Without Projectb <br />January 61 61 <br />February 60 60 <br />March 101 101 <br />April 238 238 <br />May 309 259 <br />June 418 368 <br />July 447 497 <br />August 355 405 <br />September 177 177 <br />October 89 89 <br />November 82 82 <br /> .- <br />December 80 80 <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />" Data collected by U.S. Geological Survey <br />b Estimated <br /> <br />. <br /> <br />. <br /> <br />project conditions are about the same. The quantity and quality of vegetation . <br />. determines the variety of fish and wildlife that can be found inhabiting a specific area. <br />Average daily flows during the critical growing months for vegetation are compared to <br />assess how flood control might affect the environment. The USBR's flow averages are <br />based on the assumption that the USBR is not operating according to the water control <br />diagram. Under the adopt-the-water control-manual alternative, the daily flow <br />averages for each month have been estimated. As mentioned in the water control <br />diagram, flood control releases are done primarily during the snowmelt season, which <br />is the growing season for plants. The other assumption is that outflows are basically <br />the same under both scenarios throughout most of the year. since there is little runoff <br />during the non-snowmelt periods. <br /> <br />. <br /> <br />7 <br /> <br />. <br />
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