Laserfiche WebLink
RULE 2 PERMITS <br /> available in the Annual Reclamation and Hydrology Reports submitted to the CDRMS for the <br /> period 1983 through the present. <br /> Permit Area <br /> Surface water in the mine area is limited to Streeter Gulch, Streeter Pond, East Taylor Gulch, East <br /> Taylor Pond, West Pit Pond, Warehouse Pond and sediment sump, Work Area Pond, three <br /> evaporative sewage ponds, Section 16 Pond, Prospect Pond, West Taylor Pond, and Section 28 <br /> Pond. Three additional detention ponds are located at the Loadout Area. All ponds, with the <br /> exception of the warehouse/sewage pond complex, are sedimentation ponds and respond only to <br /> runoff related events. The ponds are designed to contain or treat a 10-year, 24-hour precipitation <br /> event. Additionally, water flowing off of the reclaimed lands is retained by contour furrows, <br /> revegetated slopes and a number of small depressions/stock ponds. A number of permanent <br /> drainage channels and temporary drainage channels will also be incorporated into the final <br /> reclaimed landscape to route water efficiently to sediment ponds. Refer to Map 12 and Map 12A <br /> and Exhibit 7 for the location and information about these various pond, depressions and ditch <br /> structures. <br /> Surface Water Quality <br /> General Area <br /> Surface water quantity in the general area is variable and inconsistent from drainage to drainage. <br /> Drainages in the general area have not received the attention that the drainages adjacent to and <br /> within the permit area have received because there is no hydrologic connection between these <br /> areas. Flow estimates and water balance calculations for these areas have not been examined <br /> because they will not be disturbed by the Colowyo Mine. <br /> Permit Area <br /> The drainages that have been the most intensively studied in and adjacent to the mine area include <br /> Taylor Creek, Goodspring Creek and Wilson Creek. Continuous flow recorders have been <br /> maintained on Taylor Creek and Wilson Creek by the USGS since 1974. A continuous recorder <br /> was operated on Goodspring Creek from 1974 to 1978. The flow information resulting from these <br /> gages is presented in Table 2.04.7-8. <br /> These data reflect the highly variable nature of surface flows in the drainages. Taylor Creek, the <br /> intermittent stream, had mean monthly flows of 0.0 cubic feet per second (cfs) for much of the <br /> period of record. Mean flows greater than 0.0 cfs were extremely low and reached a peak of 2.80 <br /> cfs in May 1980 reflecting the high snowmelt generated runoff. The maximum and minimum <br /> monthly flows also included for Taylor Creek give a further insight into its dependence on <br /> snowmelt and rainstorm runoff. This information supports the contention of very limited <br /> groundwater seepage to sustain flows near the mining area. The maximum daily flow value of <br /> 18.00 cfs in February, 1980 was a result of high snowmelt runoff and rainfall on a melting <br /> snowpack. Minimum flows of 0.0 cfs again reflect the highly sporadic nature and intermittency of <br /> this stream. <br /> Rule 2 Permits 2.04-22 Revision Date: 12/20/19 <br /> Revision No.: TR-135 <br />