HYDRO20924

• Permit No: M1996052
• IBM Index Class Name: Hydrology
• Doc Date: 10/2/2003
• Doc Name: Substsitute Water Supply Plan
• From: State Engineer
• To: DMG
• 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
1313 Sherman Street, Room 818
Denver, Colorado 80203
Phone [phone]
FAX [phone]
www.watecstate.m.us
Mr. Andrew R. Rodriguez
Civil Resources, LLC
451 Oak Street
P.O. Box 680
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October 2, 2003 ~ Bill Owens
Governor
/ / qp/ Creg E. Walther
v M - l l L ~ - ~ ~ ~ Ezec°tlve Direct°r
Hal D. Simpson, P.E.
State Engineer
Fredenck, ~O 80530 . /
Re: ~~Substitute Water Supply PIan~Owen Bros. Del Camino Pit (DMG #M-96-02)
Section 32, T3N, R67W, 6th P.M. C2dopt /-~~~~ "V
Water Division 1, Water District 5, Weld County
Dear Mr. Rodriguez:
This letter is in response to your application for a substitute water supply plan for the Del
Camino Pit in accordance with Section §37-90-137(11), C.R.S. The required fee of $1,343 for
the substitute water supply plan has been submitted.
The anticipated net depletion for this plan is 35.70 acre-feet per year for up to 6.45 acres
of water surface exposed after December 31, 1980. According to the information submitted, no
water surface was exposed within the reclamation permit boundary prior to January 1, 1981.
You have provided a monthly breakdown of the annual depletions made up of 16.03
acre-feet of evaporative loss, 2.00 acre-feet of water used and consumed for dust control, and
17.67 acre-feet of water lost with the mined product. No phreatophyte credit has been applied to
this plan, however, due to partial subirrigation of the historically irrigated acreage, a credit of 1.31
acre-feet of consumptive use of groundwater has been applied. The subirrigation was
determined to be approximately 9% over the entire mining area.
The sources of replacement water are 0.1 shares of the Last Chance Ditch and fully
consumable water from the City of Longmont. Replacements during the historical irrigation
season will be provided by the 0.1 shares of the Last Chance Ditch, which yields 9.17 acre-feet
of consumptive use credits. The consumptive use credit was adjusted to account for the
historical subirrigation of the irrigated lands. The lease with the City of Longmont will provide a
total of 29.79 acre-feet of water from August through May. Of the 29.79 acre-feet of lease water
from the City of Longmont, approximately 1.64 acre-feet will cover transit losses (5.5% total
based on 0.5% per mile for the 11 miles from the City of Longmont wastewater treatment plant to
the Del Camino Pit). The amount of City of Longmont replacement water that reaches the Del
Camino Pit is 28.15 acre-feet.