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• RENE'.iAL OF COAL MINING FACILITIcS (SURFACE RUNOFF ONLY) GENERAL PERHIT IN COLORADO RATIONALE I. Update COLORADO DISCHARGE PERPSIT NUMBER COG-Sf0000 This is the first renewal of the general permit for coal mining facilities (surface runoff only). The original permit was issued March 3, 1983, and became effective on elpril 3, 1938. This general permit has been of value both co permittees and the Division. Permittees who qualify are able to secure a permit in a much snorter time than is required for issuance of an individual permit. The Division's permit drafting burden is lessened by the abiiir~ to issue certifications to the general permit for qualified facilities. II. Permit Changes Stormwater Management Plan - The federal effluent guidelines that govern • disc-harges from coal mining facilities (40 CFR 434) have not changed since the original general permit was issued. Part 434 controls most surface runoff from coal mining facilities through limitations chat aopiy to discharges from sedimentation ponds. This is consistent with regulations implemented by the federal Office of Surface Mining (OSM). In Colorado, the Colorado Mined Land Reclamation Di~~ision (C.~4..ZD) assures compliance with these federal requirements. The Division has determined that limitations beyond these are not necessary for such areas. However, these regulations do not address all sources of stormwacer from coal mining facilities. Areas such as roads and railroad lines, pond oucslopes, inactive loadouts, sites used for storage and aaincenance of material handling equipmer.c and areas for which small area eseaocions have been granted are not covered by these regulations. The federal stormwacer regulations, issued Voveaber Lti, 1?90, impact tae subject facilities in some substantial ways. As chew apoLy co coal mining facilities, the stormwater regulations primarily adds=_ss areas not covered by ?art 434. Compliance vita close regulations may oe acaieved chrouea measures of best management practices and ooi=scion prevention. 3esc management practices (BMP) means schedules of activities, prohibitions o[ practices, maintenance procedures, and ocaer management practices co prevent or reduce the pollution of tae avatars of tae Scace.