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I1 L_.J • 2000 Annual Hydrologic Report Page 2 This Year's mean daily flow values for the Cottonwood and Rapid Creek flumes are included on data pages SG-29, SH-25, and SI-25. Flow at SWGS-001 is presented graphically on data page SG-30. As usual, the flow in these Creeks is largely controlled by the City of Palisade, depending upon their need for domestic water. Also, irrigation water is diverted from the creeks by private water right holders at various locations. Table S00-1 was prepared to show the average monthly flows during the primary irrigation season when low flow in the creeks is critical. Gaps in information are due to problems with the recorder or flows below the minimum recording level of the recorder. Minimum recording levels of the flumes are listed at the bottom of Table S00-1. Monitoring on Coal Creek and Jerry Creek was started in 1995. The crest stage gages installed in Coal Canyon drainage and Jerry Creek in 1996 were destroyed by a storm in the summer of 1998. Discussions with DMG have indicated there is no need to monitor the upstream locations SWGS 07 and 09. The creeks will only be monitored at the lower monitoring points. The ephemeral flow in Coal Creek is measured at culverts located between the two refuse disposal areas, SWGS 06. These culverts provide a stable cross section and are accessible throughout the year. The intermittent flow in Jerry Creek is measured at the culvert near the Highline Canal, SWGS 08. Beginning July 1999, instantaneous flows are to be monitored quarterly. Data taken during the Year are listed on data pages SR-1 for Coal Canyon and SS-1 for Jerry Creek. There were three seeps included in the hydrologic monitoring in 1995. The location of the seeps are shown on the Hydrologic Monitoring Map. They are located adjacent to Coal Canyon drainage and Jerry Creek. They are primarily evident by the white staining on the hillsides from evaporation of the seeps. None of them flow to the creek channel but generally evaporate within a couple of hundred feet of the source. On May 30, 2000 the springs were monitored. S-95-2 was damp. All other monitoring points were dry. The monitoring results to date are shown on data page ST-1. There was no discharge from CDPS discharge points 005 thru 014 during the Year. These outfalls cover sediment pond discharges. Discharge point 015 is permitted to allow pumping water from the south end of the Roadside South Portal out the 2 West portals. Piping to this point will not be installed. • Discharge point 001 was primarily used as an overtlow to a mine water system for the preparation plant during mine operations. During March and April 2000, a discharge pipe was installed from the No.2 South Mains sump to outfall 001. The routing of this 4-inch