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37 <br />Table 4. Streamflow and water temperature requirements to maintain present production levels for Colorado <br />squawfishe and humpback chub in the Upper Colorado River, data to 1981 (From Miller et al. 1982c). <br />Fish species and Time Flowb Temp." <br />Critical areas life stage period (cfs) (C) <br />Colorado River <br />Loma - Utah Line <br />(river mile 132-154) <br />Black Rocks <br />(river mile 135-137) <br />Westwater Canyon <br />(river mile 116-124) <br />Potash - Cataract <br />Canyon (river mile 3-47) <br />Green River <br />Split Mountain <br />(river mile 199-207) <br />Jensen - Sand Wash <br />(river mile 212-290) <br />Colorado squawfish <br />spawning and larval <br />stage <br />Humpback chub <br />spawning <br />Humpback chub <br />spawning <br />Colorado squawfish <br />Young of year rearing <br />Colorado squawfish <br />spawning <br />Colorada squawfish <br />Young of year rearing <br />June 15-July 31 5,000-10,000 20-22 <br />Aug. 1-Aug. 31 3,000- 5,000 20-28 <br />May 1-June 30 10,000-13,000 16-18 <br />May 1-June 30 10,000-13,000 16-18 <br />July 15-Oct. 15 4,000- 9,000 <br />June 15-July 31 <br />Aug. 1-Aug. 31 <br />July 15-Oct. 15 <br />3,000- 4,000 <br />2,000- 2,500 <br />2,000- 4,000 <br />20-28 <br />20-22 <br />20-22 <br />20-28