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12. Monthly measurement of precipitation at the Horse Creek storage gage. I 1.1 Surface Water Monitoring Data from the continuous recording stream gages located on Horse Creek, South Prong, Lick Creek, Upper Dry Fork, Lower Dry Fork, Sylvester Gulch, Minnesota Creek above Dry Fork, and Fast Fork outflow from Beaver Reservoir have been reduced and are provided in the Quarterly Reports. Quarterly Reports include daily flow estimates with maximum, minimum and mean floras reported for each month. Locations of these stations are shown on FSchibit I. 7 Gaging records during water year 1986 are generally good. Stilling wells began J freezing in mid to late December a~ thawed out in late February with one or tcv thawing out in early March. Debris buildup was minimal in 1986 and only the 1 U.S.F.S. Minnesota Creek flume was affected. Loss of data occurred at the U.S.F.5. flume from April until July due to debris buildup as well as high flows going through the overflow diversions. Loss of data at the Upper Dry Fork flume occurred from May 25 to June 8, August 1 to August 6, August 12 to September 9, l and fran September 13, to Sept~nber 30. R4~is data loss was due entirely to Beaver activity in the area, which caused a backup of water and submergence of the flume. All other stations had good data for the remainder of the year and only minor problems which did not significantly affect data. A Dopy of the U.S.F.S. gaging record average daily flow for Minnesota Creek is contained in Appendix B. ~ A cropy of the U.S.G.S. gaging record average daily flow for the North Fork of the Gunnison above Somerset, Ca (about 1/4 mile upstream of the mine site) is contained in Appendix A. Monthly measurement of field water quality was conducted at the gaging stations 1 located on Horse Creek, South Prong, Lick Creek, Upper Dry Fork, Lower Dry Fork, Sylvester Gulch and Minnesota Creek above Dry Fork. Quarterly water quality samples are obtained for laboratory analysis form three locations: the North Fork above Sylvester Gulch, the North Fork below the Mine and Sylvester Gulch. Sampling locations are shown on F~chibit I. Water quality data previously collected by the U.S.G.S. at their North Fork gaging station ^ near Somerset was discontinued in September, 1982. 1.2 Spring Water Monitorin ' Springs included in the hydrology rronitoring program for water year 1986 are shown in Table 1.2-1 along with monitoring and sailing frequency. Monitored springs locations aze shown on E~:hibit I. All known springs in the leases area I are shown on ~chibit 2.8.1.B. (1"'=2000') which is contained in Volume 3 of the M and R Plan. In accordance with U.S. Forest Service stipulations a map of U.S. Forest Service water resources has been included as F~chibit III. Score of the I U.S.F.S. water resources are springs. Spring monitoring data including flow, water quality analysis, and other I pertinent information is contained in the Quarterly Hydrology Monitoring Reports. (2)