2008-10-15_HYDROLOGY - M1997054

• Permit No: M1997054
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/15/2008
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

DEPARTMENT OF NATURAL RESOURCES
DIVISION OF WATER RESOURCES
Bill Ritter, Jr.
Governor
October 14, 2008
Ms. KC Hallett
Applegate Group, Inc.
1499 West 120th Avenue, Suite 200
Denver, Colorado 80234-2759
Re: Parkdale Project Substitute Water Supply Plan
DRMS File No-97-054
Section 12, T18S, R72W, 6th P.M.
Water Division 2, Water District 12
Approval Period: October 1, 2008 - September 30, 2009
Dear Ms. Hallett:
Harris D. Sherman
Executive Director
Dick Wolfe, P.E.
Director

k-g& 2608
15 Divisions of Reclamatl@ti,
and We have received your April 28, 2008 letter requesting the renewal of a substitso"
ute water
supply plan (SWSP) for a quarry and sand and gravel mine, known as the Parkdale Project,
operated by Front Range Aggregates, LLC. Updated engineering has been provided in support
of this request. The mine is permitted with the Division of Reclamation, Mining, and Safety
under File No. M-97-054. The $257 renewal fee has been accepted with receipt no. 3628530.
PLAN OPERATION
Mining at the Parkdale Project is projected to continue for approximately 15 years. In a
letter dated September 12, 2008, Front Range Aggregates indicated that mining below the water
table will not occur during the timeframe of this renewal. Water is currently used at the site for
dust control and gravel washing. Evaporation will occur from exposure of 0.5 acres of water at
the settling ponds and 0.1 acres in the gravel washing pond. You have estimated that 750,000
tons of raw material out of the maximum annual production of 2,800,000 tons of raw material is
washed, while the remainder is dry screened. Your attached Table 1 shows the site net
evaporation calculations (5.0 acre-feet) and your Table 2 shows the calculations for water
consumed by site operations (38.7 acre-feet).
DEPLETIONS
You have provided a monthly breakdown of lagged depletions at this site in your attached
Table 3. The stream depletion model was developed based on the following assumptions: the
exposed surface area is 1,250 feet from an active stream, the transmissivity is 55,000 gal/day/ft,
the specific yield is 0.2, and the location of the impermeable boundary is 2,400 feet from the live
stream. Table 3 shows that during the period May 2008 - March 2009 the lagged stream
Office of the State Engineer
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www.water.state.co.us