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WSP08731
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Last modified
1/26/2010 2:49:25 PM
Creation date
10/12/2006 3:14:14 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.105
Description
Colorado River-Water Projects-Navajo
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
4/1/2000
Author
BOR
Title
Re-Operation of Navajo Dam-Recreation Rehabilitation Navajo Project Colorado New Mexico-Summary and Finding of No Significant Impact
Water Supply Pro - Doc Type
Report/Study
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<br />of the 13 acre feet would be new depletion. <br /> <br />Reservoir Ooerations <br />. The proposed action would not affect reservoir operations, but reservoir operations would <br />affect recreational use of the Park and reservoir. <br />Initial projections of end ofmonth(EOM) water levels with full development of the <br />Navajo Indian Irrigation Project, the San Juan Recovery Implementation Program, and <br />other uses, suggest that 95% of the time water levels would be between 0 and 73 feet <br />below the dam spillway elevation of6085, with the maximum drawdown occurring in <br />January and February. These projected EOM wateI levels are up to l5 feet below similar <br />historic EOM water levels. <br />The maximum expected drawdown would be 95 feet, and this is expected to occur only <br />occasionally. <br /> <br />. <br /> <br />Wetlands <br />. Project was designed to avoid wetlands to fullest extent possible; no impacts to wetlands <br />are expected. <br />. Road crossings of small well defined drainages is not expected to damage wetlands in <br />those drainages. <br /> <br />Rioarian Areas <br />. About], of 5 aCles of existing user-generated recreational areas in riparian areas in <br />management Areas F and H would be defined to limit additional encroachment and <br />retained for use under the proposed action. <br />. New facilities would be placed to avoid riparian aleas to the fullest extent possible. <br /> <br />Wildlife <br />. Wildlife at the park has habituated to park activities over the last 30-35 years. The <br />proposed rehabilitation efforts are generally located in areas having relatively high <br />historic recreational use. <br />. Temporary and localized displacement of animals is expected during construction <br />activities. <br />. Increased visitation would increase the potential for disturbance of wildlife, but <br />implementation and enforcement of management actions (e.g., seasonal or area closures, <br />etc.) to protect wildlife and special habitat would help reduce the potential disturbance. <br /> <br />Endangered Species <br />. No critical habitat for threatened or endangeled species was identified within the project <br />area. <br />. The proposed action may affect but is not likely to adversely affect the bald eagle, the <br />SW willow flycatcher, the Knowlton's cactus or cause modification of their critical <br />habitat. <br />. The Park's approximately 13 acre-feet of water depletion may affect the razorback sucker <br />and the Colorado pikeminnow in the San Juan River. However, depletions of lOO acre- <br /> <br />OllUU'J <br />
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