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Last modified
7/14/2009 5:02:35 PM
Creation date
5/22/2009 5:30:16 PM
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UCREFRP
UCREFRP Catalog Number
9433
Author
Anderson, R.
Title
Riverine Fish Flow Investigations.
USFW Year
2002.
USFW - Doc Type
Federal Aid Project F-288-R5,
Copyright Material
NO
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<br />0.1 <br /> <br />0.2 <br /> <br />0.3 <br /> <br />0.4 <br /> <br />0.5 <br /> <br />0.6 <br /> <br />0.7 <br /> <br />0.8 <br /> <br />0.9 <br /> <br />1 <br /> <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 />Colorado River - 15-Mile Reaeh <br /> <br />The IS-Mile Reach of the Colorado River is from Palisade, Colorado (RM 185) <br />downstream to the confluence of the Gunnison River at about RM 170 (Figure 4). The Colorado <br />River Recovery Program (Osmundson et al. 1995) considers the IS-Mile Reach important for <br />endangered fish management. Flows are an issue because of two major upstream diversions that <br />dewater the river during the irrigation season (April 1 to November 1). The Government <br />Highline diversion is located in lower Debeque Canyon (RM 193.7) and the Highline canal has a <br />capacity of 1,620 cfs. The Grand Valley diversion dam is at RM 185.4 and the Grand Valley <br />canal has a capacity of 640 cfs. <br /> <br />A USGS gage is located about 0.4 kmdownstream from the intake for the Grand Valley <br />canal (Figure 4) and began operation in 1990. Flows at the Palisade gage are typically 1200 to <br />1600 cfs less than above the diversion structures in spring and summer. Winter (November to <br />March) flows in the IS-Mile Reach do not appear to create fishery concerns. Flows recorded at <br />the Cameo gage (RM 199.9) appear to be at least native or higher due to senior water right calls <br />at the Shoshone power plant in Glenwood Canyon. Also there can be additional releases for <br />power generation from Green Mountain Reservoir (per comm. Karen Flogequest (USBR). <br />Flows recorded at the Palisade gage are usually higher than at Cameo between November and <br />April due to Plateau Creek, which joins the river at RM 193.3. <br /> <br /> 400 <br /> 360 <br /> 320 <br />~ 280 <br />u <br />- 240 <br />~ <br />0 <br />Ii: 200 <br />E <br />~ <br />.5 160 <br />c <br />:!: 120 <br /> 80 <br /> 40 <br /> 0 <br /> 0 <br /> <br /> <br />1998 - <br />116 cfs <br /> <br />Median - <br />126 cfs <br /> <br /> <br />2001- <br />50 cfs <br /> <br />Excedence Frequency <br /> <br />Figure 3. Minimum flows during the study period recorded at the Maybell gage with exceedence <br />frequency for the period of record. <br /> <br />6 <br />
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