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1999 Annual Hydrologic Report <br />Page 2 <br />water is diverted from the creeks by private water right holders at various locations. Table <br />S99-1 was prepared to show the average monthly flows during the primary irrigation <br />season when low flow in the creeks is critical. Gaps in information are due to problems <br />with the recorder or flows below the minimum recording level of the recorder. Minimum <br />recording levels of the flumes are listed at the bottom of Table S99-1. <br />Monitoring on Coal Creek and Jerry Creek was started in 1995. The crest stage gages <br />installed in Coal Canyon drainage and Jerry Creek in 1996 were destroyed by a storm in <br />the summer of 1998. Discussions with DMG have indicated that there is no need to <br />monitorthe upstream locations SWGS 07 and 09. They will only be monitored at the lower <br />monitoring points. The ephemeral flow in Coal Creek is measured at culverts located <br />between the two refuse disposal areas, SWGS 06. These culverts provide a stable cross <br />section and are accessible throughout the year. The intermittent flow in Jerry Creek is <br />measured at the culvert near the Highline Canal, SWGS 08. Beginning July 1999, <br />instantaneous flows are to be monitored quarterly. Data taken during the Year are listed <br />on data pages SR-1 for Coal Canyon and SS-1 for Jerry Creek. <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 />There was no discharge from CDPS discharge points 005 thru 014 during the Year. These <br />outfalls cover sediment pond discharges. Discharge point 015 is permitted to allow <br />pumping water from the south end of the Roadside South Portal out the 2 West portals. <br />Piping to this point has not been installed yet and as a result there was no discharge from <br />this point during the Year. <br />Discharge point 001 is used as an overflow to a mine water system for the preparation <br />plant. The source of the water is primarily location 3 (see the Mine Water section of this <br />report) in the Roadside South but can include flow from location 5. Flow from this site is <br />not directly related to inflows and is discussed in more detail in the Mine Water section of <br />this report. As with other winters, in order to avoid freezing problems only enough water <br />to supply the preparation plant was pumped from the mine. Data pages SD-13 presents <br />