1992-05-26_REVISION - M1974052 - Laserfiche WebLink

Home Browse Search

' EXHIBIT G - WATER INFORMATION Each mining phase will be dewatered prior to excavation commencement . The St . Vrain 100-year floodplain covers 90% of the permit area as shown on the Pre-Mining Map . The floodplain limits were obtained from Mr . William Stanton of the Colorado Water Conservation Board as delineated by Kucera and Associates . The site will be adequately graded to insure proper drainage from the site . Three culverts will be installed between the ponds to allow proper drainage and ground water flow of the site . See Reclamation Plan Map for locations . ' Water requirements for the proposed operation include 2 , 000 gallons per day for haul roads dust suppression. Based on operating 200 ' days per year , the requirement will be approximately 1 . 2 acre- feet per year . There will be no gravel processing on site during Phases I and II . ' Materials will be excavated and hauled to the adjacent plant site . A portable crusher may be set up at a later date , as shown on the Mining Plan Map for Phases III , IV, V, and VI . For the entire ' operation, any water requirements will be supplied from the well on the adjacent pit . ' Permitted wells in the area are shown on Figure G- 1 and listed on the following Table G- l . These wells are not expected to be affected by operations . ' Discharge from dewatering the site will be monitored in accordance with the discharge permit to be obtained by the operator . Discharge will flow into the existing drainages at the locations shown on the Mining Plan Map. Riprap spillways will be installed at the dewatering discharge locations . After Phases I and II are dewatered , the pump will be relocated for dewatering the remaining ' phases . Both of the existing drainages are capable of handling the water to be discharged . G- 1 1