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Environmental Assessment Bowie Resources, L.LC. <br />August 2005 Spmce Stomp Fedeml Coal Exploration License (150- 200543) <br />located approximately one -mile downstream of the Terror Creek Reservoir, and 2) the Upper <br />Terror measurement point is one -mile upstream of the confluence with the West Fork of Terror <br />Creek. Discharge measurements recorded at Cottonwood Stomp in June and July 1998 were less <br />than one cubic foot per second (cfs), and there was no discharge for measurements taken in <br />September and November 1998. Upper Terror measurement records indicate discharge from 44 <br />cfs in April 1997 to no discharge in September 1996. The third discharge monitoring point is <br />located on the West Fork of Terror Creek one -mile upstream from the confluence with the East <br />Fork of Terror Creek. Discharge measurements ranged from 198 cfs in April 1997 to 0.8 cfs in <br />August 1997. The last discharge measurement point is on Terror Ditch below the Terror Creek <br />Reservoir headgate. Discharge measurements ranged from 0.1 cfs in April 1998 to 7.9 cfs in <br />June 1998 (BLM AND GMUG 2000). <br />Overland Ditch is located north of the SSCEL, at a distance of approximately five miles and <br />upstream of Terror Creek Reservoir. Overland Ditch partially discharges to Terror Creek <br />Reservoir. Terror Creek Reservoir is located approximately 1,500 feet east of the northeast <br />corner of the SSCEL. This reservoir has two dams: one that can release water that flows toward <br />the west and into Terror Creek Ditch and the East Fork of Terror Creek, and the a second one <br />that can release water that flows toward the east and into Hubbard Creek drainage. <br />The Hubbard Creek drainage basin has an area of 58.1 square miles (BLM AND GMUG 2000), <br />with none of this basin's drainage associated with the SSCEL (Figure 3 -5). Hubbard Creek, the <br />main named creek within the Hubbard Drainage, is a perennial stream with discharge ranges <br />from 3.5 cfs to over 90 cfs. Alder Creek, Iron Point Gulch, Dove Gulch, and Sheep Corral Gulch <br />are located within the Hubbard Creek drainage basin. Alder Creek flows intermittently, usually <br />from the spring through early summer. The gulches also generally flow during the spring and <br />early summer, but are dry in the fall and winter, with the exception of Lower Dove Gulch. <br />Lower Dove Gulch is perennial with flows less than one cfs (USDA -FS 2001). <br />There are no floodplains located in the SSCEL (USDA -FS 2001 and USDA -FS 2003). <br />Surface Water Quality <br />Surface water quality in Terror and Hubbard Creeks is classified as calcium bicarbonate type <br />water with a relatively low total dissolved solids (TDS) concentration of less than 402 miligrams <br />per liter (mg/1), and pH ranges from 7.0 to 9.3 (USDA -FS 2003). Based on general minerals <br />analytical results these surface waters are suitable for domestic use, although high concentrations <br />of iron in these waters are associated with fouling of pipes and taste concerns. Both creeks are <br />classified as Aquatic Life Class 1, Recreation Class 1, Agriculture, and Water Supply. Aquatic <br />Life Class 1 standards were not attained due to elevated levels of selenium and other metals, in <br />particular when the stream crosses or lies downstream of a Mancos Shale outcrop (USDA -FS <br />2003, BLM AND GMUG 2000). <br />Groundwater <br />Groundwater associated with Terror and Hubbard Creek drainage areas occurs in alluvium <br />(unconsolidated sedimentary deposits), colluvium (heterogeneous mass of soil materials), and <br />bedrock (the Mesaverde Formation and Wasatch Formation) (USDA -FS 2003, BLM and GMUG <br />3 -23 <br />