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• 1997 Annual Hydrologic Report <br />Page 2 <br />discharged. Comparing the calculated TDS load in the River at low flow and the mine <br />discharge near the same date, the maximum increase in the River's TDS as a result of <br />mine discharge would have been 0.10%. <br />This Year's mean daily flow values for the Cottonwood and Rapid Creek flumes are <br />included on data pages SG-23, SH-23, SI-23 and SK-9 and are presented graphically on <br />data pages SG-24, SH-24, SI-24 and SK-10. As usual, the flow in these Creeks is largely <br />controlled by the City of Palisade, depending upon their need for domestic water. Also, <br />irrigation water is diverted from the creeks by private water right holders at various <br />locations. Table S97-1 was prepared to show the average monthly flows during the <br />primary irrigation season when low flow in the creeks is critical. Gaps in information are <br />due to problems with the recorder or flows below the minimum recording level of the <br />recorder. Minimum recording levels of the flumes are listed at the bottom of Table S97-1. <br />New in 1996 were crest stage gages on Coal Canyon drainage and Jerry Creek. The <br />sites were located in late 1995 but the actual gages were not installed until August and <br />• September 1996 due to access problems with BLM. SWGS-06 is located downstream on <br />Coal Canyon near the proposed CRDA-3 refuse pile. SWGS-07 is upstream on Coal <br />Canyon near the south boundary line of the permit area. SWGS-08 is located downstream <br />on Jeny Creek near our Unit Train Loadout. SWGS-09 is located upstream on Jerry Creek <br />below it's confluence with Spring Creek. These monitoring locations have been added to <br />the Hydrologic Monitoring Location Map. The sites are monitored approximately once a <br />month and checked for instantaneous flow at the time of monitoring and peak flow since <br />the last time monitored. Access is sometimes restricted by weather, BLM restricts access <br />when the roads are muddy. Data taken during the Year are listed on data pages SR-1 for <br />Coal Canyon and SS-1 for Jerry Creek. Early recordings were derived from temporary <br />stakes installed in the drainage channels. <br />There were three seeps included in the hydrologic monitoring in 1995. The location of <br />these seeps are shown on the Hydrologic Monitoring Map. They are located adjacent to <br />Coal Canyon drainage and Jerry Creek. They are primarily evident by the white staining <br />on the hillsides from evaporation of the seeps. None of them flow to the creek channel but <br />generally evaporate within a couple of hundred feet of the source. No flow or field <br />measurements were taken during the Year. The monitoring results to date are shown on <br />• data page ST-1 <br />