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n <br />u <br />8. Semiannual water quality measurement at nine wells. <br />In addition, monitoring data on stream flow and water quality are <br />obtained from the USGS Gaging Station on the North Fork near <br />Somerset. Additional spot monitoring was conducted to facilitate <br />assessment of hydrologic impacts. <br />I.1 Surface Water Monitoring <br />Several separate drainage systems have their headwaters on <br />or flow through the Mt. Gunnison No. 1 Mine coal lease <br />area. All of the streams draining the area are tributaries <br />• to the North Fork. Sylvester Gulch, Gribble Gulch, and Lone <br />Pine Gulch are ephemeral streams draining the northern <br />portion of the coal lease area including the permit area as <br />shown on Exhibit I. Minnesota Creek and its tributaries <br />drain the southern portion of the coal lease area. The <br />overall drainage exhibits a dendritic drainage pattern with <br />the streams originating in the highlands and dropping <br />steeply to the river. <br />Minnesota and Beaver Reservoirs are located on or near the <br />coal lease. Minnesota Reservoir on the Dry Fork of <br />Minnesota Creek (Dry Fork) is located centrally on the coal <br />lease area. Beaver Reservoir on the East Fork of Minnesota <br />• Creek (East Fork) is located on the southwestern boundary of <br />-g- <br />