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Protection of Hvdrologic Balance <br />• Ponds. Ditches and Diversions. RAG Empire has a drainage and sediment control plan in place. which controls all <br />water, which moves into. through, and out of the permit area. The drainage and sediment control plan is showt <br />graphically on the Drainage and Sediment Control Map (Map 26). The drainage and sediment control system consists <br />of sediment ponds, ditches, culverts, and a bridge over the Williams Fork River. In addition to these structures, the <br />Drainage and Sediment Control Map (Map 26) shows the locations of the fresh water systems and the mine water <br />handling system and associated ponds. <br />The Drainage and Sediment Control Map (Map 26) also shows several small disturbed areas that are not included <br />within the sediment control system. RAG Empire requests small area exemption (SAE) variance in accordance with <br />Rule 4.05.2 (3) for these areas. Details regarding these SAE's are given in Exhibit 18. RAG Empire will maintain <br />containment berms, vegetative cover, and grass filters, as required by the designs shown in Exhibit 18. <br />Design methodologies and calculations for al] drainage and sediment control structures have been included in Exhibit <br />18, Drainage and Sediment Control Plan. All engineering designs were performed by a qualified, registered <br />professional engineer. <br />Hydrologic Collection, Recording, and Reporting Plan <br />The plan for collecting, recording, and reporting of hydrologic data is presented in Exhibit 29, Water Quality <br />Monitoring Manual -RAG Empire. An annual hydrologic report will be submitted by March 30, for the previous <br />calendar year. Data submitted will include piezometric maps, statement concerning observed inflows from the floor <br />in the active sections during the preceding year, plots of water levels,and appropriate water quality trends. <br />PROBABLE HYDROLOGIC CONSEQUENCES <br />• Mine Inflows <br />Past and Present Inflows. A plot of the quarterly discharge for the No. 5 Mine discharge point in presented in Figure <br />21, in Section 2.04.7, Hydrology Information for the period 1982 through 1992 along with the 7 North Angle <br />discharge starting in 1989. These discharge points include inflows to both [he No. 5 and No. 6 mines, which are <br /> <br />6~ 33 <br />Midterm Response 2.05-36 ~~.d~~u i~ `~ ~ r %~"7 7/30/01 <br />