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5.1.2 Stream Gauging Stations <br />NSI continues to contract with the USGS to monitor surface water for water quality and <br />quantity. Monitoring was performed upstream and downstream of the mining operation <br />on Yellow Creek and Piceance Creek at four existing stations with extensive historical <br />data. Data for the 2011 water year (October 2010- September 2011) was published by <br />the USGS in 2012. The USGS surface water data are available to the public from the <br />USGS web site at http: / /co.water.usgs.gov. Tables 5 and 6 summarize key 2012 data <br />for surface water on the NSI site. <br />A review of USGS stream water quality data indicated no significant change in stream <br />water quality through 2011. Drought conditions in Western Colorado did affect overall <br />stream levels in the area. No effect on stream water quality was noted from the NSI <br />operation. <br />Daub & Associates, Inc. 14 NSI Annual Report 2012 <br />