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i <br /> i <br /> I <br /> ' GROUND WATER HYDROLOGY <br /> SUTEY PROPERTY DISPOSAL SITE <br /> COAL BASIN MINES, REDSTONE, COLORADO <br /> FOR MID-CONTINENT RESOURCES, INC. <br /> 1. 0 INTRODUCTION <br /> The Mined Land Reclamation Board (MLRD) asked Mid-Conti- <br /> nent Resources, Inc. (Mid-Continent) to provide some ad- <br /> ditional data on ground water hydrology of the area of the new <br /> refuse pile at the Sutey property. The information is speci- <br /> fied in a letter by MLRD to Mid-Continent dated March 5, 1984, <br /> Subject: Permit Revision, New Refuse Pile, File No. C-017-81. <br /> I I Mid-Continent instructed Geo-Hydro Consulting , Inc. <br /> (Geo-Hydro) to provide necessary data pertaining to ground <br /> j water hydrology as specified in the above referenced letter. <br /> IThe following items are addressed in this report: <br /> 1. The depth below the surface and horizontal extent of <br /> I the water table of the alluvial aquifer within the permit <br /> area ; <br /> 2. A description of the recharge, storage, and discharge <br /> characteristics of the alluvial aquifer; <br /> I� <br /> 3. Analysis of the surface and ground water information <br /> and an evaluation of the probable hydrologic consequences of <br /> refuse disposal in this area. <br /> The term "alluvial aquifer" is used by MLRD. As it will <br /> be shown later in this report, we feel that ground water <br /> bearing strata encountered during the investigation of the <br /> refuse pile cannot be properly called an alluvial aquifer. <br /> 2. 0 GEOLOGY <br /> The geology of the area is shown on the attached Plate <br /> 1, Geotechnical Conditions of Proposed Waste =Disposal. Site. On <br /> this plate , two figures show the geology of the area in dif- <br /> ferent scales. Figure B, General Geotechnical Map of Waste <br /> Disposal Area, shows the overall geologic setting. The area is <br /> underlain Mancos Shale. Mancos Shale forms several important <br /> ridges , trending in a north-south direction. Rocks of over- <br /> 14 <br /> i <br /> GEO-HYDRO CONSULTING,INC. , <br /> I <br />