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WSPC12661
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Last modified
1/26/2010 4:17:21 PM
Creation date
8/7/2007 10:14:33 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.300
Description
Colorado River Operations and Accounting - Lower Basin Administrative Procedures
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
5/16/1997
Author
DOI-BOR
Title
FWS Final Biological and Conference Opinion on Lower Colorado River Operations and Maintenance - Lake Mead to Southerly International Border - Draft for Review - 05-16-97
Water Supply Pro - Doc Type
Report/Study
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<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 />002956 <br /> <br />BIOLOGICAL OPINION <br /> <br />Table of Contents <br /> <br />Population Dynamics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 <br />Rangewide Present Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 <br />Critical Habitat - Bony tail Chub and Razorback Sucker .................. 43 <br />Species I General Response to Proposed Action - Bony tail Chub <br />and Razorback Sucker .................. . . . . . . . . . . . . . . . . . 45 <br />Southwestern Willow Flycatcher ................................. 47 <br />Listing History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 <br />Species Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 <br /> <br />Life History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 <br /> <br />Habitat Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 <br /> <br />Nest Placement and Nesting Substrate . . . . . . . . . . . . . . . . . . . . . . . . . 52 <br />Territory Size ........................................ 55 <br />Distribution and Abundance ............................... 58 <br /> <br />California ...................................... 59 <br /> <br />Arizona . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 <br /> <br />New Mexico .................................... 62 <br /> <br />Texas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 <br /> <br />Colorado . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 <br /> <br />Utah . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 <br /> <br />Nevada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 <br /> <br />Rangewide Present Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 <br />Effects to Species I Status from Past Consultations ................. 64 <br />Yuma Clapper Rail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 <br />Listing History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 <br />Species Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 <br />Distribution and Abundance ............................... 67 <br /> <br />Habitat Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 <br /> <br />Life History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 <br /> <br />Population Estimates ................................... 70 <br />Rangewide Present Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 <br />Flat-tailed Horned Lizard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 <br />Listing History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 <br />Species Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 <br /> <br />Life History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72 <br /> <br />ENVIRONMENTAL BASELINE .................................... 73 <br />Bony tail Chub and Razorback Sucker .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 <br />Historic Habitat Conditions on the Colorado River. . . . . . . . . . . . . . . . . 74 <br />Upper portion of the project area ....................... 74 <br />Lower portion of the project area ....................... 78 <br />Native aquatic species .............................. 81 <br />Human Uses of the Colorado River . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 <br />Early uses: pre-1823 ............................... 83 <br />
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