1980-07-11_REVISION - M1977493 (8)

Home Browse Search

tunnels, interceptor canals, control structures , decantation systems, and pumping facilities. The flood control facilities at Climax have been analyzed and recommendations have been developed to assure protection of the Climax facilities after operations have ceased. The purpose of the flood studies was to define the flood potential at Climax for the purpose of determining required facilities to safely route and pass floods at the end of production. At Climax, the major volume of surface runoff is from melting snow. However , there is a potential of intense thunderstorms occurring in the summer time, which can cause short duration, high peak flows, with small volumes. Low peak floods can be expected from snowmelt and can be bypassed with the water handling facilities required for rain floods. Snowfloods and rainfloods were calculated and are shown in Table 8. 6. The following is based upon the above hydrological conditions and calculations. a. Arkansas River Drainage. At the cessation of operations, the Glory Hole and Open Pit area will form a large catchment basin, with a bottom elevation of approximately 10, 268 feet ( 1200 Level) . It is believed that this basin will eventually trap and hold surface and groundwater and create a lake . Based on a knowledge of fracturing , faulting , and underground openings, it is believed that the lake will rise to about the 10 , 868-foot elevation ( 600 Level ) . The 300-foot difference in elevation between the 600 Level and the Storke Level will provide surge capacity, such that all floods will be contained in this lake. No further flood control should be necessary in this drainage basin. b. Tenmile Creek Drainage ( 1 ) Buffehr Reservoir . The existing spillway on Buffehr Reservoir will handle a "probable maximum flood . " ( 2 ) Robinson Tailing Pond. The Robinson Tailing Pond will receive drainage from the camp area, 8-10