2010-01-25_PERMIT FILE - C1981044A (4)

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observed in the permit area. However, the potential exists for the following rare and endangered species to be found within the permit area; golden and bald EC, greater sandhill crane, pergrine falcon, and black footed ferret. In addition, the potential exists for the Colorado squawfish to inhabit sections of the Yampa and Williams Fork rivers. However, no Colorado squawfish were observed during the quarterly fish and benthic organism survey that was conducted in selected sections of the Williams Fork River for a period of two and one-half years. EC has made a commitment to report all sightings of rare and endangered species to the CMLRD. The report will include species identification, date, and location. The following sightings of rare and endangered species have been noted by EC personnel: greater sandhill crane, golden eagle, and immature golden or bald eagles. All sightings have been reported to the CMLRD and OSM. To further protect raptors, EC employs araptor-proof design on all newly constructed power poles. Atypical raptor- proof design is presented in Figure 58, Typical Raptor-Proof Power Pole Diagram. EC conducted a fish and benthic organism survey in the Williams Fork River near the coal storage silo for 2.5 years. As a permit stipulation, the survey was to be conducted for five-(5) years. However, the stipulation was removed in August 1982, after EC provided a statistical demonstration that [he mining operation was not impacting the biota of the Williams Fork River. Protection of Hvdroloeic Balance Ponds, Ditches and Diversions. EC has a drainage and sediment control plan in place, which controls all water, which moves into, through, and out of the permit area. The drainage and sediment control plan is shown graphically on the Drainage and Sediment Control Map (Map 26). The drainage and sediment control system consists of sediment ponds, ditches, culverts, and a bridge over the Williams Fork River. In addition to these stmctures, the Drainage and Sediment Control Map (Map 26) shows the locations of the fresh water systems and the mine water handling system and associated ponds. The Drainage and Sediment Control Map (Map 26) also shows several small disturbed areas that are not included within the sediment control system. EC requests small area exemption (SAE) variance in accordance with Rule 4.05.2 (3) for these areas. Details regarding these SAE's are given in Exhibit 18. EC will maintain containment berms, vegetative cover, and grass filters, as required by the designs shown in Exhibit 18. Design methodologies and calculations for all drainage and sediment control structures have been included in Exhibit 18, Drainage and Sediment Control Plan. All engineering designs were performed by a qualified, registered professional engineer. Hvdroloeic Collection, Recording, and Reporting Plan The plan for collecting, recording, and reporting of hydrologic data is presented in Exhibit 29, Water Quality Monitoring Manual - EC. An annual hydrologic report will be submitted by March 30, for the previous calendar year. Data submitted will include piezometric maps, statement concerning observed inflows from the floor in the active sections during the preceding year, plots of water levels, and appropriate water quality trends. PROBABLE HYDROLOGIC CONSEQUENCES Mine Inflows Past and Present Inflows. A plot of the quarterly discharge for the No. 5 Mine discharge point in presented in Figure 21, in Section 2.04.7, Hydrology Information for [he period 1982 through 1992 along with the 7 North Angle discharge starting in 1989. These discharge points include inflows to both the No. 5 and No. 6 mines, which are Permit Revision 04-34 2.05-36 Revised 7/2/04