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WSP04991
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Last modified
1/26/2010 2:16:28 PM
Creation date
10/12/2006 12:47:06 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.111.K
Description
Central Utah Participating Project
State
UT
Basin
Colorado Mainstem
Date
7/29/1988
Title
Final Biological Opinion: Duchesne River Basin Utah
Water Supply Pro - Doc Type
Biological Opinion
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<br />N <br />(.. <br />c-; <br />N <br /> <br />18 <br /> <br />1"-' <br /> <br />Ie <br /> <br />Utah. Uintah Carbon Grand. Emerv Wavne and San Juan Counties: and <br />Colorado. Moffat Countv. The Green River and its 100-year floodplain from <br />the confluence with the Yampa River in T. 7 N.. R. 103 W.. section 28 (6th <br />Principal Meridian) to the confluence with the Colorado River in T. 30 S. . <br />R. 19 E.. section 7 (Salt Lake Meridian). <br /> <br />Colorado. Rio Blanco Countv' and Utah. Uintah Countv. The White River and <br />its 100-year floodplain from Rio Blanco Lake Dam in T. 1 N.. R. 96 W. . <br />section 6 (6th Principal Meridian) to the confluence with the Green River <br />in T. 9 S.. R. 20 E.. section 4 (Salt Lake Meridian). <br /> <br />Colorado Delta and Mesa Counties. The Gunnison River and its 100-year <br />floodplain from the confluence with the Uncompahgre River in T. 15 S.. <br />R. 96 W.. section 11 (6th Principal Meridian) to the confluence with the <br />Colorado River in T. 1 S.. R. 1 W.. section 22 (Ute Meridian). <br /> <br />Colorado Mesa and Garfield Counties' and Utah Grand San Juan Wavne. <br />and Garfield Counties. The Colorado River and its 100-year floodplain <br />from the Colorado River Bridge at exit 90 north off Interstate 70 in <br />T. 6 S.. R. 93 W.. section 16 (6th Principal Meridian) to North Wash. <br />including the Dirty Devil arm of Lake Powell up to the full pool <br />elevation. in T. 33 S.. R. 14 E.. section 29 (Salt Lake Meridian). <br /> <br />New Mexico San Juan Countv' and Utah. San Juan Countv. The San Juan <br />River and its 100-year floodplain from the State Route 371 Bridge in <br />T. 29 N.. R. 13 W.. section 17 (New Mexico Meridian) to Neskahai Canyon in <br />the San Juan arm of Lake Powell in T. 41 S.. R. 11 E.. section 26 <br />(Salt Lake Meridian) up to the full pool elevation. <br /> <br />Life Historv <br /> <br />The life history phases apparently most criticaly associated with the <br />endangered status of the Colorado squawfish include spawning. egg . <br />fertilization. and development of larvae through the first year of life. <br />These phases of Colorado squawfish development are tied closely to specific <br />habitat requirements. Natural spawning of Colorado squawfish is initiated on <br />the descending limb of the annual hydrograph as water temperatures approach <br />20'C. Spawning. both in the hatchery and in the wild. generally occurs in an <br />approximate 2-month time frame between July 1 and September 1. although high <br />flow water years may suppress river temperatures and extend spawning in the <br />natural system into September. Conversely. during low flow years when the <br />water warms earlier. spawning may occur as early as June. <br />
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