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~^. <br />~' :.. <br />• Creek Dit~_h water to the Dry Fork prolongs flow in this ephemeral <br />channel. flow in Deep Creek Ditch, like that of South Prong and Horse <br />• Creek, stuns from higher elevations outside the lease black. Of the <br />entire Minnesota Creek basin less than 18b is area under which mining <br />and possible subsidence may occur. Less than 9p of the basin lies <br />upstream of areas under which mining and possible subsidence may <br />occur. <br />The mean annual discharges for Horse Creek, South Prong, Lick Creek <br />and Dry Fork were estimated on the basis of the measured discharge of <br />each creek for water years (October - September) 1978, 1979 and 1980 <br />and long term records for Cow Creek near Paonia and Smith Fork near <br />Crawford. Each station had missing records. Estimates of the missing <br />records for stations other than Dry Fork were made on the basis of <br />records from nearby stations, weather records for Paonia and typical <br />recession curves. The records for Lower Dry Fork reflect the storage <br />in Minnesota Reservoir and diversion into Dry Fork from Deep Creek <br />Ditch. Because of the lack of records at the upstream station and <br />unknown inflows from Deep Creek Ditch, the Dry Fork record could not <br />• be estimated directly. Instead, the mean annual runoff was estimated <br />indirectly on the basis of runoff data from Lick Creek and Sylvester <br />Gulch. <br />The following are the estimated mean annual runoff: <br />Station Runoff (acre feet) <br />Horse Creek 740 <br />South Prong 1180 <br />Lick Creek 315 <br />Dry Fork 1100 <br />The figure for Dry Fork does not include diversion from Deep Creek <br />Ditch. • <br />Stream gaging stations were installed in June of 1977, so a complete <br />. record of 1977 water year •,vas not obtained. Because of low snowfall <br />(3) <br />