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<br />001720 <br /> <br />Method <br /> <br />Visual observations were made by fishery biologists rafting <br />approximately 35 miles of the San Juan River from Navajo <br />Dam to Salmon Ruin downstream of Bloomfield. Measure- <br />ments were taken at 71 sample sites of changes in river <br />stage, wetted perimeter, and average depth for pools, riffles, <br />and runs. Measurements were also taken at 77 sites of water <br />quality parameters, including water temperature, dissolved <br />oxygen, conductivity, and salinity. Measurements of river <br />stage were taken by placing temporary rebar stakes at each <br />sample site and recording latitude and longitude coordinates. <br />Wetted perimeter was measured perpendicular to the <br />riverflow at each sample site. <br /> <br />Attachment C describes in greater detail the effects of the Test <br />on fish populations and the aquatic habitat of the San Juan <br />River below Navajo Dam. In addition, Attachment 0 provides <br />a graph summary of the water and air temperature data <br />collected during the Test. <br /> <br />Before the Test, fish shocking was conducted, and about <br />1,200 trout were captured below Citizens Ditch, moved <br />upstream, and maintained for replacement purposes in the <br />event the Test resulted in significant losses downstream. After J <br />the Test, NMDGF restocked the river below Citizens Ditch with <br />trout equaling the same weight and size. <br /> <br />- 14- <br /> <br />Summer Low Flow Report - November 2001 <br />