PERMFILE105229

• Permit No: M1989029
• IBM Index Class Name: Permit File
• Doc Name: APPLICATION FOR A MINING SPECIAL PERMIT
• Media Type: D
• Archive: No

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Groundwater
The proposed mining operation will intercept alluvial
groundwater. The groundwater table varies in depth from 0 feet
to 6 feet below the surface. The reclamation plan will leave an
open k~ody of water which will impact surrounding water right
owners.. Impacts due to mining will come from four sources (1)
moisture loss in material hauled from the site, (2) wash waters
used t.o process sand and gravel, (3) water used for dust control
of material, and (4) lake evaporation from removing material and
leaving a new body of water. The amount of water consumed from
each cf these operations is estimated to be as follows:
Hoisture Loss in Haterial
The proposed operation is expected to process approximately
200,000 tons of sand and gravel per year. The average moisture
content of this material at time of shipment is expected to be
4~. This number is based on field data collected by the City and
County of Denver on some of their stockpiles. This moisture
content would be equivalent to 5.9 acre-feet per year.
Wash Water
Hashing operations will require approximately 1500 gallons per
minute. The annual consumption of wash water also includes
losses associated with recycling through a three cell sediment
pond. Total consumption would be 0.7 acre-feet per year.
Dust Control
Dust control will require watering existing haul roads at
specified intervals. The amount will vary depending on time of
year and existing weather conditions. There is approximately
1,800 feet of unpaved haul road on the property. Haul roads will
be watered between Hay to September (five months). The average
application is expected to be 6,700 gallons with a minimum of
three applications being made for 80 days. This would amount to
1,608,000 gallons of water per year or 4.94 acre-feet per year.
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