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-13- holes to Leases D-047201, C-0126699 and C-8425, the Division concurs that the lab analyses submitted provide adequate representative data for areas to be mined during the present permit term. However, during the next permit term when underground mining progresses into Leases C-8424 and C-8425, representative samples of roof and floor rock from each of the two lease areas will be submitted to the Division. Sample analyses will be submitted prior to the development of workings within either of the two new lease areas. The operation is in compliance with the requirements of this section. V. Hydro~orq~ic Balance; Surface Water - Rules 2.04.5, 2.04.7, 2.05.3(4 ~~ . _ The Deserado Mine baseline hydrologic conditions were established by the results of a detailed hydrologic inventory conducted by Vaughn Hansen Associates of Salt Lake City, Utah on behalf of Western Fuels Association, Inc. The hydrologic data and analyses are contained in Section II.C of the Deserado Mine mining permit application. A summary of the Deserado Mine baseline hydrologic conditions, is presented in the fo]lowing paragraphs. The Deserado Mine area is drained by portions of two watersheds which are tributary to the White River. Scullion Gulch and tributaries are an ephemeral watershed consisting of about 7560 acres which drains the southern and western portions of the Deserado Mine area. Red Wash and its tributaries are much larger consisting of 78,400 acres and draining the eastern and northern portions of the Deserado Mine area. The upper reaches of Red Wash are intermittent. Water flow in either of the streams within the Deserado Mine area is in response to thunderstorms or rapid snow melt runoff. Surface flows ranged from 45 cubic feet per second (CFS) to 185 CFS in Scullion Gulch for thundershower and snowmelt events respectively. Flows in Red Wash ranged from 8 CFS to 240 CFS for thunderstorm and snowmelt events, respectively. The mean annual flow of the White River was estimated as 672 cubic feet per second or about 486,000 acre-feet per year. Monthly flow distribution from 1972 to 1978, as estimated from the U. S.G.S. gaging station above Rangely, indicates that about 43 percent of the annual flow of the White River occurs (in the Deserado Mine Vicinity) during the months of May and June, the result of snowmelt runoff from higher elevations in the drainage basin. Surface Water Quality The results of water quality analyses run on collected water samples indicate that surface water in the Deserado Mine area is predominantly of the calcium-sulfate type. Ionic concentrations of sodium and magnesium approach and occasionally exceed those of calcium. The normally high calcium and magnesium concentrations in the area relative to sodium result in low sodium adsorption ratios. Total dissolved solids concentrations in the area are quite variable, both spatially and temporally. No significant difference exists between dissolved solids contents of the White River above and below the Deserado Mine area tributaries. As expected, dissolved solids concentrations of the White River vary inversely with flow, with the lowest concentrations coming during periods of high flow, primarily in the months of May and June when most of the flow is derived from snowmelt. Data collected during the snowmelt period in April