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STORMWATER t•fANAGEMENT PLAN GOLDEN WONDER MINE CDPS PERMIT No. CO-0043877 INTRODUCTION MARCH, 1QQZ The document hereby tendered is a "Stormwater Management Plan" (SWMP) submitted as a part of the documentation required before receiving a Metal Mining General Permit. It is a plan to reduce or eliminate pollution and/or sedimentation which might occur during precipitation runoff brought about by rapidly melting snows or thunderstorm activity. There are some phenomena such as violent cloudbursts or combinations of events such as a devastating fire followed by significant runoff that could not be prevented by the efforts of man and which, though very infrequent, must be re- cognized for their potential and the inability to do anything about them. The Golden Wonder Mine is located about 2.0 miles southeast of Lake City, Hinsdale County, Colorado in the NE4NE4 Sec. 10 and NWgNWg Sec. 11, T. 43 N., R. 4 W., NMPM. The mine can be reached by traveling south from Lake City on Colo. Hwy 149 to the Vicker's Ranch where a person turns east on a private road through the ranch and up the hill past the bridge across the Lake Fork of the Gunnison River. Proceed straight ahead up the road between the houses, through an often locked gate, and up the canyon of a drainage just north of Park Creek. The road crosses into the Park Creek drainage and divides north of a large pond. Take the right fork across Ehe_: Park Creek valley and follow the switchback road through the timber on the north face of the mountain always staying to the right until reaching the saddle in the ridge where the road more or less levels off. The branch straight ahead leads to the lower or 6th level of the Golden Wonder Mine and the well traveled road to the left then right almost level across the slope of the mountain leads to the upper or 3rd level. The drive from Lake City to the mine covers 2.5 to 3 miles because of the winding road. DESCRIPTION OF MINE ACTIVITIES. The Golden Wonder Mine is an underground gold mine accessed through two portals called the 6 or sixth level and the 3 or third level. Both portals are marked by waste dumps, the upper or third level dump covering an acre and the lower or sixth level dump cover- ing 1.5 acres. The surface activities relative to this mine occur on these dumps except for haulage which is=over=the. roads previously described. None of dump areas or access roads are surfaced. At this time there are no buildings on these dumps except for one small shed and no buildings, except for temporary structures, are planned. The upper or 3 level portal is established in a scree or talus slope which is porous and so permeable that no surface runoff can occur. The lower or 6 level portal is established in colluvium, also extremely porous and permeable and, on the north side of Deadman Gulch, is on enough of a south and west facing slope that the wind and sun ordinarily keeps it clear of snow. Runoff from these slopes has never been observed. (1.)