PERMFILE42981

• Permit No: M1993059
• IBM Index Class Name: Permit File
• Doc Date: 12/8/1993
• Doc Name: STORMWATER MANAGEMENT PLAN MID WESTERN FARMS RESOURCES
• Media Type: D
• Archive: No

• a
Mr. Hal Simpson
State Engineer's Office
October 19, 1993
Page 2
The Arkansas River is over-appropriated and, therefore, any water consumption
due to the operation will require augmentation of the stream system.
Augmentation of the stream system is required due to possible calls in
Colorado between Holly and the Colorado state line and calls by Kansas in
accordance with the Interstate Compact Agreement between Colorado and Kansas.
The landowner of the subject site, Mid-Western Farms, owns water rights which
have been used to irrigate the subject property along with other properties.
They intend to use them as the source of augmentation water to offset the
groundwater consumption due to the proposed operation.
B., EVAPORATIVE LOSSES
The NOAA Technical Report NWS 33, Evaporation Atlas for the Contiguous 48
United States, published by the U.S. Department of Commerce was used to
determine the amount of evaporation. The annual evaporation is 62 inches at
the subject location.
Precipitation at the site was found by using data from the publication,
~L~ma ograohv of the United States No. 81. The precipitation at the mine
site is estimated to be the same as that found at the nearest weather station
which is located in Holly. The annual mean precipitation is 14.44
inches/year.
Effective precipitation was determined in order to compute the net lake
evaporation. Effective precipitation was computed as 708 of the total
precipitation. Effective precipitation was then subtracted from the gross
evaporation to obtain the net evaporation. The net annual evaporation from
a lake surface at the subject site is 4.32 feet (51.9 inches).
During the first year it is anticipated that 20-25 acres will be mined.
Approximately 708 of the material excavated will be waste material. The
waste material will be immediately placed back into the pit and, therefore,
it is conservatively estimated that an eight acre lake will be created by the
mining during the first year.
Consequently, the average annual evaporation from the gravel pit lake at the
end of the first year will be approximately 34.6 acre-feet.
C. OPERATIONAL COMSUNPTIVS USES
Water is retained in the material which is exported off-site. It is
estimated that 48 of the gross weight of the products is water, as suggested
by the State Engineer's Office. The 98 estimate is very conservative based
on only 3/8 inch rock and greater will be mined from the pit. Approximately
800,000 tons of material will be mined from the pit each year. This equates
to 23.6 acre-feet of consumptive use.