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Last modified
1/26/2010 12:49:20 PM
Creation date
10/11/2006 11:37:22 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.300.02
Description
San Juan River Recovery Implementation Program - Recovery Plans & Information
Basin
San Juan/Dolores
Water Division
7
Date
10/29/1991
Title
San Juan River Recovery Implementation Program - Draft
Water Supply Pro - Doc Type
Report/Study
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<br />(~ <br />.~ <br />(., <br />~ <br />( ;) <br />00 <br /> <br />nonnative species must be closely examined to determine the impact from fish <br />passage development. <br /> <br />3.3.4 Selected course of action <br /> <br />Program activities will determine if and how development and maintenance of <br />habitat for the Colorado squawfish and razorback sucker (backwaters, fish <br />passages and spawning habitat) will contribute to the recovery of the species. <br />These efforts will include testing the management options described in this <br />section to determine their usefulness to recruitment and their contribution to <br />recovery. The following stipulations will be applied. <br /> <br />1. Testing and implementation of management techniques will not be <br />conducted in confirmed spawning and nursery areas or in river reaches <br />which, if modified, might adversely affect use of confirmed spawning or <br />nursery areas; and <br /> <br />2. The genetic integrity of wild populations must be protected when using <br />hatchery-reared experimental animals. <br /> <br />3.4 WATER QUALITY IMPROVEMENT <br /> <br />Increased loading of the San Juan River and its tributaries with soil salts, <br />elemental contaminants and pesticides from irrigation return flows. mine waste <br />runoff and brine salt discharges from oil and gas wells, and oil refinery <br />wastes degrade water quality and may be contributing to the decline of the <br />Colorado 5quawfish and the razorback sucker. Water quality studies in the San <br />Juan River basin have previously focused on trace-element residues and <br />organochlorine in both fish and wildlife. Comparison of data from 1980 and <br />1984 with 1973 data on elemental residues in the Farmington area indicates <br />residual levels of many elements not only are elevated but may be gradually <br />increasing. Data on the toxic effects of selected chemicals on rare fish are <br />being collected and evaluated. The study elements that are the basis for <br />evaluating water quality in the San Juan River and its tributaries are: <br /> <br />22 <br />
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