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<br />0008~7 <br /> <br />Cimarron Dredging Environmental Assessment <br /> <br />needed. It is hoped that there will be adequate water in the system for a high spring flow in 2002. <br />Flash floods in August 2001 have put significant amounts of sediments in the system and a high <br />tlow in 2002 would be very beneficial. <br /> <br />Comment 14: Page 13: The water quality monitoring design on Crystal Reservoir before and <br />during the dredging is not specific to any depth. At what depth is the sampling taking place? <br />Surface sampling will almost always yield adequate dissolved oxygen values. Water quality <br />profiles within the reservoir may show different values. <br /> <br />Response: Water quality measurements are being taken at a depth of 3 feet with exception to the <br />. Cimarron River, which varies between 1-2 feet depth depending on tlow. Water quality data has <br />been added to the Appendices. <br /> <br />Comment 15: Page 14. Paragraph 2: What is considered to be "signiticant" turbidity' This needs <br />to be quantified and based on turbidity levels where impacts to aquatic life occur. <br /> <br />Response: In discussion with CDOW, Reclamation was unable to identify at what level turbidity <br />impacts aquatic life. For rhe purposes of this document. significant turbidity is defined as the <br />level where sediments begin to be deposited in the Gunnison River below Crystal Reservoir and <br />where significant effects may occur. Reclamation will work closely with CDOW on this <br />determination. <br /> <br />Comment 16: Page 15. Paragraph 2: The proposed project is not within the Curecanti <br />Archeological District. The primary focus of the Archeological District is in the vicinity of Blue <br />Mesa Reservoir. <br /> <br />Response: "within" was changed to "near". <br /> <br />Comment 17: Page 16, Paragraph I: Affect should read affected. <br /> <br />.. <br /> <br />Response: Changed. <br /> <br />Comment 18: Page 18. Paragraph 3: Isn't the primary effect of the proposed action more <br />accurately to restore the channel of the Gunnison River to its 1965 elevation? <br /> <br />Response: "the channel of' was added to clarify the sentence. <br /> <br />Comment 19: Page 19. Paragraph I: To reiterate an earlier point, the level of unacceptable <br />turbidity needs to be quantified. <br /> <br />Response: This comment was addressed in response to Comment IS. <br /> <br />27 <br />