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reported slightly Power flows in 2002.-than 2001 which may be due to lower than average <br />• precipitation in months May through October. All stations except for Piceance Creek below <br />Ryan Gulch had lower than average flows for the period of record. Flow for Piceance Creek <br />~J <br />I~ <br />below Ryan Gulch was 11.6 cfs for years 2.001 and 2002, which is significantly below average. <br />Industrial activity at C-a and C-b Oil Shale Tracts may have influenced flows (higher) during <br />period of record, especially station 62A2 (Corral Gulch) near C-a tract: No significant effects on <br />stream flow have been noted or expected during NSI operation (1990-2002). <br />Review of USGS stream water quality data indicates no significant change in stream water <br />quality through 2002. Therefore, no effect on stream water quality was noted from the NSI <br />operation. <br />6.1.5 Monitoring Wells <br />Dedicated monitoring wells have been constructed to monitor four water-bearing zones, the <br />Dissolution Surtace, B-Groove, A-Groove and Perched aquifers, see Figure 5-1 for location of <br />monitoring wells. The aquifers are monitored at five sites; immediately down-gradient of mining <br />operation, up-gradient at two locations, remote down-gradient and east in panel. 2. Eighteen <br />monitoring wells were completed with water samplers to obtain water quality samples from <br />discrete zones. A total of seventeen wells are equipped with continuous water level <br />measurement transducers and data acquisition and storage systems. <br />34 <br />