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The Fish Creel Borehole Area consists of two adjacent dewatering systems. Each of the 12 '/. inch O.D. boreholes houses a 6 inch discharge pipe, electrical cable, and a 3D0-600 gpm capacity pump. Electrical power is supplied by the powerline system depicted on Map 39, Foid~el Creek Mine Powerline Location. The substation location for the dewatering boreholes is shown on Maps 26 and 39. At the substation location, after topsoil removal, a fence was constructed around the perimeter of [he of the site, the enclosed area is approximately 48' X 24'. Within the fenced area, a 12' X 12' X l.:i` concrete pad was poured, and afour- pole structure was constructed. The general layout of [his site is shown on Figure 18. A gravel blanket, approximately 6 inches deep, has been placed around the concrete p:td and extends to the fence. During [he life of the facilit}• weeds will be controlled within the fence by way of herbicide. Mine water is pumped up the 6 inch discharge line and into the delivery line where flow is metered. As the mine ++•ater is discharged from the delivery line it is injected with reagents, subsequently mixed and is then circuited through the retention pond system while the prescribed reationsreactions take place. Immediately prior to final discharge from [he facility, a pH reducing reagent m:iy be injected into the treated water, if required. After treatment, water flows from the impoundment through a discharge ditch to Fish Creek, A portable structure, approximately 20' X 8' X 8', placed on the north light duty road for the easternmost cell of the treatment facility houses storage containers ofNaOH and equipment for metering and injecting the reagent. An additional structure, approximately 32' X 8' X 8', v+ill be placed adjacent to this existing structure to house a larger storage container for NaOH. A smaller p~~rtable structure, approximately 8' X 8' X 6', placed on the west light duty road for the westernmost pond Houses storage containers of HzSO, and equipment for metering and injecting that reagent. Overhead power is provided to all of these structures, via pole mounted lines from the substation. Three to five additional poles will be set to provide power to the remote monitoring equipment. • In order to minimize the potential for damaging the Fish Creek Borehole dewatering pumps, a recirculation line has been installed in the system. The recirculation line is a 4 inch HDPE pipe buried underneath the road on the east side of the east cell that terminates at the Fish Creek Ventilation Borehole, where mine water can be discharged back into the mine. The recirculation line ties into the mine water discharge line in a manhole placed in the north berm of the eastern cell. Also within the manhole are valves to direct flow into [he recirculation line and flow meters for monitoring the mine water ~fischarge line and [he recirculation line. When the line and manhole are no longer needed, they will be removed from the site as part of the final reclamation process. The ability to divert flow from the mine water discharge line to the recirculation line allows TCC to run the borehole pump at its rated capacity, while regulating dischauge from [he treatment ponds at a lower rate. For example, the pump can pump at a rate of 330 gpm, while TCC discharges from the treatment pond at only 200 gpm (recirculating 130 gpm). The amount of water that i~ processed through the treatment system is dictated by [he water quality in Fish Creek. installation of remote monitoring equipment at sites upstream and downstream of the Borehole discharge point, and at the effluent of the treatment pond, as shown on Map 13t~, will provide a more efficient means for monitoring the water quality in Fish Creek. Automated sample results, along with system operating parameters will be relayed to TCC's administration building where tF~e}• can be reviewed. Current information will be available for regulating the treatment process at the borehole facility. TCC may install additional monitoring equipment in the ponds to further enhance the treatment process. APPR®!/E~ APR 1 4 2000 TR 00-35 2.05-50.1 03/28/00