1985-04-22_PERMIT FILE - M1974052

• Permit No: M1974052
• IBM Index Class Name: Permit File
• Doc Date: 4/22/1985
• Doc Name: REGULAR 112 PERMIT APPLICATION FORM AMENDMENT
• Media Type: D
• Archive: No

r
WATEF2 I NP'OF?MAT I ON
' Each mining phase will be dewatered prior to excavation
commencement.
r 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
r Conservation Board as delineated by K.ucera and Associates. The
site will be adequately graded to insure proper drainage from the
site.
rThree culverts will be installed between the ponds to allow
proper drainage and ground water flow of the site. See
r Reclamation Flan Map for locations.
Water requirements for the proposed operation include 2, (')()0
gallons per day for haul roads dust suppression. Based on opera-
ting 200 days per year, the requirement will be approximately 1 . 2
acre-feet per year.
r 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, and V. For the
r entire operation, any water- requirements will be supplied from
the well on the adjacent pit.
r Permitted wells in the area are shown on Figure G-1 and
listed on the following Table G-1 . These wells are not expected
to be affected by operations.
r Discharge from dewatering the site will be monitored in
accordance with the discharge permit to be obtained by the oper-
ator. 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
r the remaining phases. Both of the existing drainages are capable
of handling the water to be discharged.
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r
1
G-1
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