PERMFILE56960

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 4/20/2007
• Section_Exhibit Name: Exhibit 43 U.S. Fish and Wildlife Service Windy Gap Process
• Media Type: D
• Archive: No

Greyslune Develupmenl Cunsultanls, Inc. •
June 10, 1986
Page 2.
The following paragraphs summarize specific activities and their
consumptive water uses to be implemented at the Foidel Creek
Mine. Each of these activities is defined in the memorandum for
underground mining operations and is based on a 3.5 million tons
per year production rate.
Mining Consumption
This use includes water consumption by mining equipment and
machinery, primarily for general mine usage and dust control.
Based on actual operating conditions at the mine and projections
for maximum production, an estimate of 2 gpm and 11 gpm will he
utilized for surface dust suppression and general underground
uses, respectively. All of this water will be lost to evapora-
tion. Four gpm will be utilized in the bathhouse and operation
buildings, the majority of which will be returned to the shallow
ground water system via the septic tank and leach field. This 17 •
gpm (27 acre-feet per year) will be supplied from the deep well
and is not considered a surface depletion in this analysis.
Ventilation Consumption
This use includes evaporation from the coal seam induced by
incoming low humidity air which becomes nearly saturated before
it exits the mine. Using the ten square mile area to be mined and
a rate of evaporation of 86 acre-feet per year per square mile
(as determined for the Belina Mine in Utah), total evaporation
would equal 66 feet-acre per year. However, the source of this
water will be from the coal seam and overburden aquifer and is
not considered a surface depletion in this analysis.
Coal Processing Consumption
This use includes coal preparation plant use for coal
washing, processing and other treatment processes. As currently
proposed in the mine plan application, no coal processing will be
conducted at the mine.

Revised 10/24/86