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The carehales may intercept the "?" and Twentymile Sandstones. In addition, the corehales will most likely <br />r intercept the Lennox, Wadge and possibly Sage Creek coal units. Yt is not anticipated that the carehales will <br />intercept the underlying Tract Creep Sandstone. Figure I , Cer?e?a? '?ra?igrap?ric "o?ur?r? - ?au?t uur?ty area, <br />shows the general stratigraphy far the Sage Creek area. <br />Surface Topagraph?: The general topography afthe area is characterized by relatively gentle north-northeast <br />facing, moderately sloping, side slope benches and ridges, with steep south-south rest facing escarpments an the <br />east and south end ofthe project area. Topographic reliefin the proposed exploration area is appraxirraately ?,SaO <br />feet to 7,2a0 feet. <br />Geola icg Setting: foal bearing strata of the pra?ect area are part of the Yles and llllan?s Fork Fannatians of the <br />Mesaverde Group. The coals ofprirnaxy economic intezest are designated as the Middle Caal Group, and include <br />the Lennox, V?adge, Sage Creek and Wolf Creek coal seams. These units and their stratigraphic sequences are <br />illustrated in Figure I. <br />The prapased exploration area is located in the southern extension of the WaskakilSand'V?ash Structural Basin. <br />The basin is bordered an the east the Park Range Anticline and an the southwest by the Axial Basin Anticline. <br />Stratigraphically, the Middle Coal Group eras deposited het?reer? two regressive sandstone deposits. Surface <br />expressions afthese two sandstone units, the Twentymile Sandstone Member ofthe Williams Fork Formation, <br />and the Trout Creek Sandstone Member afthe Iles Formation appear s prominent cliff forming units throughout <br />the Williams Fork Mountains. <br />The coal seams in the project area occur within a localized structural basin, with the axis both trending and <br />plunging to the north. It is defined by the Tav? Creek Anticline an the east, the Sage Creek Anticline an the west. <br />The Fish Creek Anticline and ashakie Syncline trend northwest through the project area. Dips range from <br />approximately 9° along the east flank of the Sage Creek Anticline, to 15 - 20° to the north. Faulting associated <br />`? with the Taw Creek Anticline has been identified within the area by U.S. Geological Survey geologists. ether <br />faulting in the area is likely, but not v?rell understood, and better definition of the occurrence and extent of faulting <br />is one ofthe primary objectives afthe prapased exploration program. <br />Surface Water Resources: The project area is bounded an the north and northwest by Sage Creek, and to the east <br />and southeast by Grassy Creek, perennial tributaries to the ?'ampa River. The drainage areas that i'law northwest <br />toward Sage Creek are characterized by ephemeral flows, typically flowing only in response to spring snQwmelt <br />and summer precipitation. Subwatersheds that drain eastward to Grassy Creek include Scatchman's Gulch and <br />Annand's Draw and are characterized by ephemeral ar intermittent streamflows. The proposed exploration <br />drilling will be conducted sa as not to adversely impact any of the potentially affected drainages. <br />SCC, as part of its Seneca II Kline and Yaast Mine aperationss evaluated Grassy Creek, Scatchman's Gulch, <br />Annand's Draw and Sage Creek far Alluvial galley Flaars ?A?Fs}. The A?F evaluations were conducted in <br />accordance with Colorado program A'F guidelines; the CDRM determined there were na A?Fs along brassy <br />Creek, Scatchman's Gulch and Annand's Draw within the exploration area. There are several small fields slang <br />Sage Creek that meet the A?F criteria, but they are all upstream of the project area. BLM, as part of the Coal <br />Suitability Review far the Little Snake Resource Management Plan, evaluated lands with federal coal to <br />determine ifmining would interrupt, discontinue or preclude fanning operations. The BLM did not identify any <br />A?'Fs in the project area. <br />,Groundwater Resources: Groundwater occurrence within the project area is generally limited to the Trout Creek <br />and Twentymile sandstone units and the shallow alluviallcalluvial aquifers associated with <br />?5'age ('reek !'rnje?r • 2f10? N(}! <br />Q?lOt4i09