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<br />s.1.2 scope <br />WRN's hydrology monitoring program concentrates on ground water as there are no <br />perennial streams or springs located on the sodium leases. The USGS stream gauging <br />station monitoring program is conducted with WRN support to provide regional water data. <br />6.1.3 Stream Gauging Stations <br />As required by the ROD, (project Record of Decision from EIS), WRN contracted for <br />surface water monitoring of water quality and quantity, upstream and downstream of the <br />cone of depression on Yellow and Piceance Creeks. tVionitoring was done by the USGS on <br />four existing stations with extensive historical data. <br /> <br />Data for the 1997 water year (October, 1996 -September, 1997) was published in 1998 by <br />the USGS as Data Report CO-97-2. See USGS report, pages 431 - 446 for data pertaining <br />to the WRN project. The data for 1998 will be published in 1999. Table 6-1 is a summary <br />of key 1997 data for the WRN site. Historical data indicates all stations reported higher <br />flows in 1997 than 1996 which corresponds with increased precipitation in 1997. All <br />stations except station 6242 had higher flows than average for period of record. Industrial <br />activity at C-a and C-b Oil Shale Tracts may have influenced flows (higher) during period of <br />record, especially station 6242 near C-a tract. No significant effects on stream flow have <br />been noted or expected during WRN's operation (1990-1997). Spring runoff in 1998 was <br />high with the crossing at Horse Draw and other locations getting washed out. <br />n <br />35 <br />