REV04849 - Laserfiche WebLink

Home Browse Search

Cotter Corporation - C-JD-9 Mine Stormwater Management Plan -Permit 1! COR-040028 Revision 1 -January 28, 1994 -Page 2 Waste Storage Areas -This is the 2.4 acre mine dump located just outside the JD-9 portal. Vent Holes - There are three vent holes #1 (.09 acres) #2 (0.09 acres) and ~3 (.34 acres). The vent holes were assessed and that assessment revealed that there is no potential for appreciable run off. Access Roads -The graveled access road to the mine office is approximately 700 feet long (.26 Acres). The access road to the mine water treatment ponds is 1650 feet long (.61 acres); this access road has a flat gradient, porous soils, and extensive vegetative coverage which allows precipitation to infiltrate into the soil instead of running off. Mine Water Treatment Ponds -Two water treatment ponds are used for settling solids pumped from the mine, along with abarium-radium sulfate co-precipitate which is formed as a result of the mixture of a barium chloride solution with the mine water. The initial pond is 50' x 50' x 10' deep (.06 Acres) with a holding capacity of approximately 74,600 gallons below the discharge pipe. The second pond is 122' x 130' x 6' deep (.36 Acres) with a holding capacity of approximately 472,300 gallons below the discharge pipe. 4. Stormwater Management Controls a. SWMP Administrator The SWMP Administrator for this site is Dave Diss, the Environmental Technician for Cotter Corporation's Western Slope Office. b. Risk Identification and Assessment Site risks include the following: Waste Stora a Area -The mine waste storage area has the potential to be impacted by the drainage which has been blocked off in one area with waste material. Although there is a 48" diameter culvert located in the waste dump to allow runoff to continue down the drainage, this outflow has a substantial impact on the downstream face of the waste dump and the drainage channel immediately downstream from the waste dump.