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Last modified
1/26/2010 2:57:52 PM
Creation date
10/12/2006 4:13:39 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.300.03
Description
San Juan River - Recovery Implementation Program - General Info
Basin
San Juan/Dolores
Water Division
7
Date
6/22/2001
Title
Final Environmental Assessment on Proposed Short-Term Low FlowTest Releases from Navajo Reservoir into the San Juan River
Water Supply Pro - Doc Type
EIS
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<br />o <br />o <br />'.) <br />.:.;, <br /> <br />Response: <br /> <br />~ <br /> <br />12. Comment: <br /> <br />Response: <br /> <br />13. Comment: <br /> <br />Response: <br /> <br />14. Comment: <br /> <br />Response: <br /> <br />The resource specialists gathering the various test data will submit in <br />writing their findings, analysis, and conclusions for review by peers within <br />Reclamation, Documentation will occur in writtenfonnat and through <br />video footage and still pictures, The SJRBRIP is not a review entity, <br /> <br />The draft EA offers no detail on how Reclamation will monitor the river <br />during the test to ensure that significant impacts are detected in a timely <br />fashion - and the low flow test terminated should those impacts begin to <br />occur. <br />Please reference the Final EA, It provides a more detailed explanation of <br />how the river will be monitored to ensure that significant impacts are <br />detected in a timely fashion, Reclamation staff and New Mexico state <br />personnel will be on the river daily during the test to monitor effects, <br /> <br />Please provide an explanation justifying the proposed length of the low <br />flow test and why it is being conducted in July, <br />5 - 10 days was selected as the proposed length of the test in order to <br />allow as muchjZexibility in the monitoring process as possible, It also <br />provides a couple of days for the river to acquire equilibrium after the <br />releases are ramped down to 250 cfs, In addition, the resource specialists <br />monitoring the river need time to travel its length from the dam to Bluff, <br />UT, observing and documenting any impacts, July was chose in order to <br />allow time for the river to stabilize after the spring peak; because Animas <br />River jZows should still be high, thus maintaining needed flows <br />downstream from Fannington; and because July should also have high air <br />temperatures, so that impacts on water temperature can better be <br />detennined, <br /> <br />One of the factors to terminate the test is a flow less than 500 cfs, at the <br />Farmington, NM gauge, Historic flow data both at Farmington, NM and at <br />Bluff, UT should be provided to determine the difference in flows between <br />the two stations and within the Glen Canyon National Recreation Area. <br />Further, it would seem appropriate that flow measurements should be <br />made at Bluff, UT and compared to the flows at Farmington NM, A <br />threshold value should also be established at Bluff to accommodate <br />recreational use, <br />One of the categories of the flow recommendations is to meet a target base <br />jZow (mean weekly non-spring runoffjZow) of500 cfsfrom Fannington to <br />Lake Powell. This will be detennined by monitoring USGS real time <br />streamjZows at Shiprock, Four Comers and Bluff. The USGS maintains <br />rhese stations, so Reclamation will not need to take measurements of <br />streamjZows in this area, <br /> <br />13 <br />
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