2006-08-24_HYDROLOGY - M2002052

• Permit No: M2002052
• IBM Index Class Name: Hydrology
• Doc Date: 8/24/2006
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Western Equipment & Truck Inc.
• Permit Index Doc Type: Correspondence
• Media Type: D
• Archive: No

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STATE OF COLORADO
OFFICE OF THE STATE ENGINEER
Division of Water Resources
Department of Natural Resources
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1313 Sherman
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Colorado 80203
Denver
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August 22, 2006 ~ /1UU T 2006
FAX [phone]
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Division of Reclamati
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Mining and Safety
Mr. Bob Condon Q
Western Equipment & Truck, Inc.
2055 1st Avenue
Greeley, Co 80631
RE: Two Rivers Rock Pit Substitute Water Supplx Plan, M-2002-0 25
Section 2, T4N, R67W, 8th P.M.
Water Division 1, Water District 4, Weld County
Approval Period: June 1, 2006 through December 31, 2007 (or May 31, 2008)
Contact Phone Number for Mr. Bob Condon: 970-353-6682
Dear Mr. Condon:
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Bill Owens
Governor
Russell George
Executive pirector
Hal D. Simpson, P.E.
State Engineer
Your letter dated February 13, 2006, requesting renewal of the above referenced substitute
water supply plan to cover depletions caused by an existing gravel mining operation, has been
reviewed. Replacement water has been leased from the Town of Milliken and copies of leases for
2006 and 2007 were provided to this office on June 30, 2006. The required fee of $217 for the
renewal of this substitute water supply plan has been submitted. The applicant submitted $1343 for
the renewal of this plan therefore a Refund Request Form is included with this plan. The original
plan was approved on August 13, 2003.
According to the information provided, the mining operation has not commenced on this pit,
thus no groundwater was exposed at the site. This plan describes the proposed water uses for the
period of June 1, 2006 through May 31, 2008 for this new mining operation. The mined material from
the site will be used during the construction of a development on adjacent property owned by
Western Equipment & Truck, Inc. ("WETCO"). The proposed plan anticipates the net depletions
associated with the evaporation of the groundwater exposed for each month, as shown in the
attached Table 1. Because this is a new mining operation, no groundwater was exposed within the
permit boundary prior to January 1, 1981.
The anticipated net depletion during the term of this plan is 23.05 acre-feet cronsisting of
11.88 acre-feet of evaporative loss (based on a maximum surface area to be exposed at the site of
4 acres and a net evaporation rate of 2.6 acre-feet per acre), 1.92 acre-feet of water used and
consumed for dust control and 9.25 acre-feet of water lost with the mined product (based on an
estimated 150,000 tons peryearof mined product). No dewatering is provided or sought underthis
plan and no phreatophyte credit has been applied to this plan. If dewatering will occur, the Applicant
is required to provide the details of dewatering and amend this plan to accountfor lagged depletions
from dewatering.