2011-06-08_HYDROLOGY - M1997054

• Permit No: M1997054
• IBM Index Class Name: HYDROLOGY
• Doc Date: 6/8/2011
• Doc Name: SWSP
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Email Name: BMK
• Media Type: D
• Archive: No

DEPARTMENT OF NATURAL RESOURCES
6
DIVISION OF WATER RESOURCES
June 8, 2011
Mr. Stephen Buechner
4 ,/? Applegate Group, Inc.
? 1499 West 120th Avenue, Suite 200
Denver, Colorado 80234-2759
John W. Hickenlooper
Governor,
Mike King
Executive Director
Dick Wolfe, P.E.
Director/State Engineer
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, 2009 - September 30, 2011
Dear Mr. Buechner:
We have received your January 7, 2011 letter (a revised letter from that dated
September 29, 2010) requesting the renewal of a substitute water supply plan (SWSP) for a
quarry and sand and gravel mine, known as the Parkdale Project, operated by Front Range
Aggregates, LLC. The most recent SWSP approval letter was dated October 14, 2008.
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. 3642195 for the 2009-2010 approval period, with an
additional $257 renewal fee accepted with receipt no. 3647542 for the 2010-2011 approval
period.
PLAN OPERATION
According to a letter dated October 1, 2009, mining at the Parkdale Project is projected
to continue for approximately 8-12 years in the alluvium, and approximately 30 - 40 years in the
granite quarry. In that letter, Front Range Aggregates indicated that mining below the water
table will not occur on a consistent basis during the first year of this renewal (October 1, 2009 to
September 30, 2010). It is assumed that mining below the water table will not occur on a
consistent basis during the second year of the renewal (October 1, 2010 to September 30,
2011). 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, 0.1 acres in the gravel washing
pond, and 1.0 acre in the dewatering trenches on site. You estimated that 258,405 tons of raw
material was mined during the 2009-2010 approval period, and projected that 283,936 tons of
raw material will be mined during the 2010-2011 approval period. Your attached Table 1 shows
the evaporative consumptive use calculations (4.23 acre-feet per year), and your Table 2 shows
the calculations for water consumed by site operations (13.73 acre-feet for 2009-2010, 14.48
acre-feet for 2010-2011). The attached Table 3 shows the SWSP operational summary from
October 2009 - December 2010. Since depletion calculations from January 2011 - September
2011 were not included in the above referenced tables, it was assumed that the proposed
evaporative and operational losses over this period will be the same as those months of the
previous year, January 2010 - September 2010.
V REc Q
Office of the State Engineer UN 0 8 2011
1313 Sherman Street, Suite 818 a Denver, CO 80203 o Phone: [phone] • Fax: [phone]JOW of keckImaUOtc,
www.water.state.co.us Mining and Sa ty