2020-02-07_PERMIT FILE - M2020007 ‎(2)‎

• Permit No: M2020007
• IBM Index Class Name: PERMIT FILE
• Doc Date: 2/7/2020
• Doc Name: Application
• From: L.G. Everist, Inc.
• To: DRMS
• Email Name: ECS
• Email Name: MAC
• Media Type: D
• Archive: No

EXHIBIT G WATER INFORMATION (CONT)
Discharge Permits Surface Water Management
When necessary, ground water will be pumped and discharged from
the Ragsdale Reservoirs mine under a CDPS Permit which the operator
will obtain from the Colorado Department of Public Health and
Environment, Water Quality Control Division (COLORADO DEPARTMENT OF
HEALTH AND ENVIRONMENT-WQCD) . This permit will remain active during
the life of the mine . The discharge points may change as mining
progresses and all necessary changes will be submitted to the WQCD
for modifications to the discharge points .
Runoff from disturbed areas will be managed and controlled to
protect against pollution, of either surface or groundwater through
the implementation best management practices which include sloping
disturbed areas inward toward the site, vegetating berms and other
disturbed areas, and other site-specific controls as needed.
Estimated Consumptive Water Use
The annual consumptive uses of water for the Ragsdale Reservoirs
mine are estimated to be :
USES VOLUME
Acre-feet
4% Moisture Loss in Materials (1.7 50.05
Million tons)
Dust Control 3 .00
Water Surface Evaporation (10 ac) 1 23 .80
Total Consumption (Augmented) 76.85
Substitute Water Supply Plan
Ground water depletions associated with L.G. Everist ' s Ragsdale
Reservoirs operation will be covered under a substitute water supply
plan (SWSP) pursuant to C.R.S . 37-90-137, approved by the State
Engineer' s Office (SEO) for replacement of the ground water
depletions due to mining. This plan will be updated and renewed
every 2 years .
The Applicant will maintain a SWSP throughout the life of the
mine . After completion and reclamation of all lined reservoirs there
will be no long-term evaporative depletions . However, if any unlined
open surface water areas remain at the end of reclamation, then a
court approved augmentation plan will be applied for before
reclamation is complete.
100-Year Floodplain
Portions of the Ragsdale Reservoirs mine are located within the
100-year floodplain of the South Platte River. The applicant will
obtain a Flood Hazard development Permit from Weld County as needed.
The location of the 100 year flood line on the affected lands was
transferred from FIRM Panel 081123C1915E to all maps .
L.G. Everist, Inc. Ragsdale Reservoirs 30 February 6,2020