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2015 AHR Page 3 <br />TDS load equates to approximately 1949 tons of Total Dissolved Solids, TDS, being carried by <br />the river past the mine that day. The mine discharge on January 6, 2015 (the closest monthly <br />analysis), was 275.4 gpm @ 1270 mg/I TDS; resulting in approximately 2.1 tons of TDS being <br />discharged. Comparing the calculated TDS load in the River at low flow and the mine discharge <br />near the same date, the maximum increase in the River's TDS as a result of mine discharge <br />would have been 0.11 %. <br />This Year's mean daily flow values for the Cottonwood and Rapid Creek flumes are included on <br />data pages SG -59, SH -28, and SI -28. Flow at SWGS 01 is presented graphically on data page <br />SG -60. As usual, the flow in these Creeks is largely controlled by the City of Palisade, <br />depending upon their need for domestic water. Also, irrigation water is diverted from the creeks <br />by private water right holders at various locations. Table S15-1 was prepared to show the <br />average monthly flows during the primary irrigation season when low flow in the creeks is <br />critical. Minimum recording levels of the flumes are listed at the bottom of Table S15-1. <br />Monitoring on Coal Creek and Jerry Creek started in 1995. The crest stage gages installed in <br />Coal Canyon drainage and Jerry Creek in 1996 were destroyed by a storm in the summer of <br />1998. Discussions with DRMS indicated there was no need to monitor the upstream locations <br />SWGS 07 and 09. The creeks will only be monitored at the lower monitoring points. The <br />ephemeral flow in Coal Creek is measured at culverts located between the two refuse disposal <br />areas, SWGS 06. These culverts provide a stable cross section and are accessible throughout <br />the year. The intermittent flow in Jerry Creek was measured at the culvert near the Highline <br />Canal, SWGS 08. Beginning July 1999, instantaneous flows were monitored monthly. Data <br />taken during the Year is listed on data page SR -4 for Coal Canyon. Monitoring was suspended <br />for Jerry Creek (SWGS 08) with the approval of TR62 on 11/8/11, therefore, no monitoring was <br />performed for SWGS 08 during the Year. <br />There were four seeps included in the hydrologic monitoring in 1995. The locations of the <br />seeps are shown on the Hydrologic Monitoring Map. They are located adjacent to Coal Canyon <br />drainage and Jerry Creek. They are primarily evident by the white staining on the hillsides from <br />evaporation of the seeps. None of them flow to the creek channel but generally evaporate <br />within a couple of hundred feet of the source. On April 19, 2006, Snowcap Coal Company <br />submitted a technical revision, TR50, requesting to discontinue seep monitoring. The request <br />was approved by the Division on July 25, 2006. Therefore, no monitoring was performed during <br />the Year. <br />There was no discharge from CDPS discharge points 005 thru 015 during the Year. These <br />outfalls cover sediment pond discharges. Discharge point 015, now inactive, was permitted to <br />allow pumping water from the south end of the Roadside South Portal out the 2 West portals. <br />Discharge point 016 is permitted for gravity discharge from the northwest intake pool. It <br />replaced outfalls 001 and 002 on March 31, 2002. <br />Discharge point 001 was primarily used as an overflow to a mine water system for the <br />preparation plant during mine operations. During March and April 2000, a discharge pipe was <br />installed from the No. 2 South Mains sump to outfall 001. The routing of this 4 -inch diameter <br />