HYDRO20205

• Permit No: M2004013
• IBM Index Class Name: Hydrology
• Doc Date: 2/21/2007
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Martin and Wood Water Consultants, Inc.
• Media Type: D
• Archive: No

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STATE OF COLORADO
OFFICE OF THE STATE ENGINEER /
Division of Water Resources /,~ i,
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Department of Natural Resources IFe
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1313 Sherman SUeet, Room 818 fi
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Denver, Colorado 80203 ~ ~6,~
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FAX (303) 86&3589

waterslate.co.us
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"' ~-'_ ~^' -- r^' '1 B11! Ritter, Jr.
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Governor
February 16, 2007 ,/Fry 9 ~ ~, ~ Harris D. Sherman
Exeafive Director
~~ ~ '~' Hal D. Simpson. P E.
Ms. Michelle Cunico Johnson '~ ~~' ~ °~~ State Engineer
Martin and Wood Water Consultants, Inc.
602 Park Point Drive, Suite 275
Golden, Colorado 80401
Re: St. Barbara Sand and Gravel Pit, 2007 Substitute Water Supply Plan
DMG File No. M-04-013 /
Section 1, T21S, R63W and Section 6, T21S, R62W, of the 6`h P.M.
Water Division 2, Water District 14
Dear Ms. Johnson:
This letter is in response to your letter of October 16, 2006 requesting renewal of a
substitute water supply plan (SWSP) for a sand and gravel pit to be operated by the applicant,
Trans-Colorado Concrete (a division of Pete Lien & Sons, Inc.). The Applicant shall be
responsible for compliance with this plan, but the State Engineer's Office may also pursue the
landowner for eventual compliance. The required fee of $257 for the substitute water supply plan
has been paid.
This plan describes the proposed water uses from January 1, 2007 through December
2008 for this new mining operation. The total annual stream depletions for the St. Barbara
Sand and Gravel Mine, which include actual, lagged evaporative and operational loses for the
period is 34.28 acre-feet for 2007 and 35.48 acre-feet for 2008. The estimated total annual
operational losses, including water retained in product and dust suppression, are 12.61 acre-
feet for both 2007 and 2008. The total estimated losses from evaporation are 25.37 for
calendar year 2007 and 24.66 acre-feet for calendar year 2008. There will be four settling and
wash ponds with an exposed water surface area totaling 6.1 acres. The size of the settling and
wash ponds is anticipated to remain constant during the 2007 and 2008 period. There will be
two, 4.1 acre cells mined during the 2007 and 2008 period. The cells will be dewatered via the
dewatering trench when the cells are being actively mined but the cells will be allowed to fill with
water during periods when the cells are not being mined. Evaporative losses in the cells will be
incurred during these periods. The dewatering trench will be 4,500 feet in length, with an
average width of 5 feet for a total exposed water surface area of 0.52 acres. No phreatophyte
credit has been applied to this plan.
Total estimated annual aggregate production is 352,000 tons per year, resulting in an
annual consumptive use of 10.4 acre-feet of water retained in the mined product. The total
annual water consumption for dust control is estimated at 2.21 acre-feet for both 2007 and 2008.