2015-12-21_PERMIT FILE - C1981041

Home Browse Search

local landfill area according to the local rules and regulations governing such waste disposal. Pefroieum products such as grease, lubricants and machine oil are collected by an approved waste oil pickup service for refinery recycling. (g) Mine openings either have been or will be permanently sealed as part of the facilities removal phase of reclamation consistent with 30 CFR 75.1711. Mine portals and other mine openings are identified in Exhibits 6A through 11 A and 58, Tab Section 13. The openings are or will be sealed using an MSHA approved concrete-block bulkhead or by completely filling the entry for a minimum of 25 feet with incombustible material. The design for mine opening permanent seals is depicted in Figure 14-2. The shaft shown on Exhibit SL-16-009, Tab Section 13, was backfilled with dirt to within 5' of the surtace and a concrete plug poured in the top 5'. This plug was covered with a minimum of 4' of dirt. The Northwest Intake portal was sealed in May 1990, but was not reclaimed until the mine filled with water to the portal elevation. The water level reached the portal near the end of 1992 and long term drainage through a 6" siphon was established as CDPS outfall 002. The water discharged at outfall 002 originates in up-dip sections of the South Portal in the No. 2 and No. 4 South Mains. The siphon discharge has handled the water generated in the mine from December 1992 through March 2002. Some water from the South Portal was consumed in the wash plant and mine and discharged through Outfall 001. Figure 14-9, Roadside South Portal, Mine Inflow Rate Determination, shows a 300 gpm maximum mine inflow for the period 1993 through 2000, based on metered outfall discharge and consumptive use. The Northwest Intake Siphon with a maximum flow rate of about 220 gpm was not able to handle the maximum flow. 14-29 (Rev. 08/07)