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42.04 APPLICATION FOR PERI4IT FOR SURFACE OR UNDERGROUND MINING ACTIVITIES -- <br />_ MINIMUM REQUIREMENTS FOR INFORMATION ON ENVIRONMENTAL RESOURCES. <br />!• <br />2.04.7 Hydrology Description. <br />have. been extensively developed for domestic and agri- <br />cultural water sources. The State Engineer's records <br />depict 43 registered wells completed within the a11wi- <br />um located in Sections 14, 15, Z1, 23, 28, 29, 31, and <br />32., T.13 S., R. 92 W.; Sections 1, 2, 10, 11, 12, T.14 <br />S., R.92 W.; and Section 6, T. 14 S., R. 91 W., 6th P.M. <br />These wells range from 77 feet to 14 feet deep and typ- <br />ically produce water from 12 feet. The well yield ran- <br />ges from 5 gpm to 120 gpm with average yields of ap- <br />proximately 17 gpm. Slater quality is highly variable <br />within the alluvial fill. Most wells completed near <br />the river sustain quality adeeuate for human consump- <br />tion; however, the higher sulfate and total dissolved <br />solids values are probably a function of return irriga- <br />tion flows and well completion depths near the alluvi- <br />um-t4ancos shale contact. For additional information, <br />refer to the Alluvial Valley Floor- Study presented in <br />Volume 4, and the Groundwater Appendix, Volume 4. <br />i Localized Alluvium-Colluvium <br />Localized deposits of colluvial material reworked by <br />fluvial processes are present within the area of <br />grou:ldwater investigation, primarily within the Ste- <br />ven's Gulch, West Fork Terror Creek, and Roatcap Creek <br />drainages. These deposits are generally 20 to 30 acres <br />in size and provide industrial (Steven's Gulch), domes- <br />tic (Long Draw), and agricultural (Morrell cow camp) <br />water: sources. Extrapolation of hydrologic testing <br />performed during development of the Steven's Gulch well <br />field (refer to Groundwater Hydrology Appendix, Volume <br />4) will be substantiated by additional monitoring well <br />construction during 1984 in the East Roatcap and Ste- <br />ven';s Gulch drainages. Typically, yields from these <br />so urc:es are moderate (27 gpm at the Steven's Gulch well <br />field), with transmissivity values ranging from 187 to <br />230 :.q. ft. per day, and storage coefficient of 0.0002 <br />(Wri€~ht Water Engineering - Ground Water Hydrology Ap- <br />pend::x). Water from wells penetrating this lithotype <br />are classified as sodium bicarbonate (Brooks, 1983). <br />Rechtirge is accomplished from precipitation and run- <br />off, and water is discharged from springs or wells. <br />Revised 10/01/87 <br />31 <br />