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STORMWATER MANAGEMENT PLAN MONARCH QUARRY CHAFFEECOUNTY,COLORADO COLORADO LIME COMPANY, INC. The Monarch Quarry lies in the SWl/4 of Sec.33, TSON, R6E, NMM. The quarry has been mined for limestone and dolomite since the early 1900's by Colorado Fuel and Iron Company, CALCO and now by Colorado Lime Company, Inc, d.b.a. CALCO, the latter under Colorado DMG Permit No. M-96-068. The potential pollutant is siltation of the South Arkansas River from mining operations on the premises. There are neither acid producing minerals (sulfides) nor toxic reduction chemicals on the premises. Equipment is fueled from a mobile fueling unit. Lubrication of equipment is performed off-site at a contained facility in Salida, Colorado. Mining activities are tamed out on the premises between late spring to early fall. There is no wintertime operation. The potential pollutant sources on the property are the access roads, the spoils pile which is being mined and the work pad where limestone material is placed to be run through a crushing and screening unit to a product pile which in rum is shipped from the site directly to customers or to the company's plant in Salida, Colorado for further processing. There is a weighing station (scales) and a cement pad, the latter being used for equipment storage. The equipment used in the operation is a dozer, front-end loader, crushing and screening unit and off highway and on highway trucks. A water truck is used on the roads for dust control. The quarry high wall on the eastern edge of the quarry has a mined out area at its base preventing storm water from entering the spoils pile on the western side of the quarry. The south boundary of the quarry and the adjoining property is not protected by this mined out "trench". To protect the South Arkansas River in this area, a berm of at least three foot in height has been placed between the working area and the river. The berm is continuous to the stabilized west wall of the spoils pile where the floor of the work area intersects contour line 10025. The spoils pile is being mined from south to north and from east to west leaving a berm on the west wall of at least three foot between the work area and the river. Gradient will be at 1% or as near to flat as possible to the south and the siltation decant pond. The siltation decant pond is cleaned regularly and at least after each storm or run-off event with afront-end loader. Depth and area of the pond are increased with need. The plant manager shall be the person responsible to develop and implement this plan. He shall use the Best Management Practices to reduce erosion and prevent sediment delivery to [he State waters. The unincorporated townsite of Garfield lies northeast and down gradient of the quarry and next to the South Arkansas River from whence it obtains its water supply. The plan administrator shall check, periodically, and at least after any major stormwater event, the intake of Garfield's water supply to insure the silt is not being transported and entering this area and beyond. In addition, the plan administrator shall check the riverbanks and eddies in the immediate area of the quarry for silt deposits. This SWMP is accompanied by a SWMP Map showing contour and all geological and man-made features, which is incorporated herein by reference.