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GENERAL39727
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Last modified
8/24/2016 7:59:06 PM
Creation date
11/23/2007 10:19:53 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1999002
IBM Index Class Name
General Documents
Doc Date
7/22/1999
Doc Name
FINAL ENVIRONMENTAL IMPACT STATEMENT VOLUME 1 CHAPTER 3
Media Type
D
Archive
No
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CNAPTERTHREE <br />Enuironmen~it Consequences <br />Parachute Site <br />Federal Endangered or Threatened Species <br />Bald Eagle. With the netting of all active process ponds, potential effects to bald eagles from <br />eating waterfowl exposed to hypersaline waters would be eliminated under tb~e Agency Preferred <br />Alternative. <br />Peregrine Falcon. With the netting of all active process ponds, potential effects to peregrine <br />falcons from eating waterfowl exposed to hypersaline waters would be elimn~ated under the <br />Agency Preferred Alternative. <br />Colorado River Fish. Four species of endangered fish occur in the Colorado River downstream <br />from the Parachute Site: Colorado squawfish, razorback sucker, humpback chub, and bonytail <br />chub. The Colorado squawfish (as named in the Draft EIS) has been renamed the Colorado <br />pikeminnow. <br />Impacts to Colorado River fish would be primarily the same as those described for the Proposed <br />Action. However, the effects of impingement of fish and entrainment of larval fish at the <br />existing Colorado River water intake structure were not evaluated in the Drat EIS, and these <br />effects aze described below. This analysis applies to both the Proposed Action and the Agency <br />Preferred Alternative. <br />The primary source of water for American Soda's Pazachute Site would be l~nocal's existing <br />alluvial wells located neaz the confluence of the East Fork and West Fork Parachute Creek with <br />the Middle Fork Parachute Creek. However, American Soda also intends to re-activate Unocal's <br />existing water intake system, which pumps water directly from the middle o1'the Colorado River <br />about 1 mile northeast of the town of Parachute. Water is gravity fed from the mid-channel crib <br />to an onshore sump through a pair of 48-inch pipes and is then pumped to an adjacent 5.5-acre <br />settling basin located on a river terrace 20 feet above the river bank. Another set of pumps can <br />deliver water from the settling basin to the Parachute Site through an existinl; buried pipeline. <br />American Soda intends to replace the pumps and electrical hazdwaze at the pumping station and <br />to perform general maintenance activities. Maintenance would not involve heavy equipment <br />construction in the channel or on the banks. <br />Although the Rifle to Debeque section of the Colorado River is designated as critical habitat, it is <br />likely that there aze currently no populations of endangered fish species and no spawning activity <br />in that section. However, this reach of the Colorado River is scheduled for recovery activities <br />(stocking) of razorback sucker and Colorado pikeminnow this yeaz or next as part of a lazger <br />stocking effort. Two size classes aze to be released (4-6 inches and 10-12 inches), with an <br />objective of building an adult population as soon as possible. The effects of'the intake structure <br />on fish would depend on fish size, future spawning, where spawning occurs relative to the intake <br />structure, and when water is taken from the river. <br />As described in the BO (Appendix L), water velocities across the trash rack: would be low and <br />would have little potential for impinging fish on the trash racks. The 2- to 6-inch screen opening <br />of the trash racks may not prevent larval oryoung-of-the-yeaz razorback sucker and Colorado <br />pikeminnow from being diverted into the intake pipes in the Colorado River and survive passage <br />3-18 Threatened and Endangered Species <br />
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