2014-06-09_REVISION - M1979191 - Laserfiche WebLink

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The Three Bells Pit(facility)is located at 6428 E. Larimer County Rd 32,Fort Collins,and Colorado(see Appendix A,Figure 1). A facility map showing facility-specific characteristics and best management practices(BMP)implemented at the facility appears as Figure 2 in Appendix A. The facility consists of approximately 339 acres of land used for mining sand and gravel. Site operations include excavation of sand and gravel; material loading,unloading,and conveyance;aggregate crushing and screening;vehicle and equipment maintenance and fueling;pit dewatering; and material storage and stockpiling. During the preparation of aggregate the facility also generates wash water. Stormwater infiltrates the ground or flows to the settling basin where it either infiltrates or evaporates. Water from the Three Bells facility flows off the property into both the Cache La Poudre River and the Boulder Ditch, which both run adjacent and through portions of the facility boundaries(see Figure 2). The following permitted outfalls are present at the facility and are shown on Figure 2: • Outfall 001. The discharge from a settling area located in the southwest portion of the site,prior to entering the Cache La Poudre River.Flow rate Avg= 1.44 MGD • Outfall 002. The discharge from a settling area located in the southwest portion of the site,prior to entering the Cache La Poudre River.Flow rate Avg= 1.44 MGD • Outfall 003. The discharge from a settling area located in the southwest portion of the site),prior to entering the Cache La Poudre River.Flow rate Avg= 1.44 MGD • Outfall 004.The discharge from a settling area located in the southwest portion of the site,prior to entering the Cache La Poudre River.Flow rate Avg= 1.44 MGD *All discharges must comply with the lawful requirements of federal agencies,municipalities,counties, drainage districts,and other local agencies regarding any discharges to storm drains systems, conveyances,or other water courses under their jurisdiction. The facility map includes the following features(see Figure 2): • Mining site boundaries • Access and haul roads • Stormwater outfalls and an outline of the drainage area of each stormwater outfall • Estimated direction of flow • Each existing structural control measure to reduce pollutants in stormwater runoff • Non-structural BMPs,as applicable • Springs,streams,wetlands, and other surface waters • Mine drainage or any other process water • Dedicated areas used for asphalt or concrete batch plants • Dedicated areas used for recycling asphalt or concrete Three Bells Pit Stormwater Management Plan 2 12/2013