GENERAL50293

• Permit No: M1987049
• IBM Index Class Name: General Documents
• Doc Date: 10/14/2004
• Doc Name: Substitute Water Supply Plan
• From: SEO
• To: DMG
• Media Type: D
• Archive: No

STATE OF COLORADO
OFFICE OF TFiE STATE ENGINEER
Division of Water Resources
Department of Natural Resources
1313 Sherman Street, Room 81 B
Denver, Colorado 80203
Phone [phone]
FAX [phone]
www.watecsta[e.co.us
Tom Hatton
JR Engineering
6020 Greenwood Plaza Boulevard
Greenwood Village, CO 80111
October 12, 2004
RECEIVED
OCT 1 4 2004
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Bill Owens
Governor
Division ~f Minerals and Geology Russell George
Executive DireQOr
Hal D. Simpson, P.E.
State Engineer
Re: Substitute Water Supply Plan, Bromley Lakes Pit (M-87-049)
Sections 12, Township 1 South, Range 67 West, 6th P.M.
Water Division 1, Water District 2, Adams County
Dear Mr. Hatton:
We have received your letter of October 4, 2004, requesting an amendment to our August 26,
2004 approval of the above referenced substitute water supply plan.
The proposed supply plan is to replace depletions caused by evaporation from up to 48 acres
of water surface exposed after December 31, 1980 and the removal of water in product. According to
the information submitted no water surface was exposed prior to January 1, 1981. The City of
Brighton will line the pit with a slurry wall by the end of 2004. Once the pit is lined, the area of
evaporation is predicted to decrease. The plan estimates that the area of evaporation will be 48 acres
for August through December and will then decrease to 10 acres for the remainder of the plan period.
Consumptive use of water at the property consists of 69.4 acre-feet of evaporation from the
maximum 48 acres of exposed pond area and 23.6 acre-feet lost in product (4% moisture of 800,000
tons of raw material). No phreatophyte credit has been applied to this plan. The monthly lagged
depletion and replacement requirements are found on the attached table. Since the depletions have
not yet reached steady state conditions the lagged depletions total 91.8 acre-feet.
This amendment seeks to change the replacement sources from those specified in the plan
approved on August 26, 2004. The source of replacement water for this plan will be 17.2 acre-feet of
leased fully consumable replacement water from Consolidated Mutual Water Company
("Consolidated"), 37.6 acre-feet of leased fully consumable Thornton effluent leased from Nursery
Acres Limited Partnership and 39 shares of Fulton Ditch. The 17.2 acre-feet of effluent leased from
Consolidated will replace depletions for October 2004 and April 2005 and the 37.6 acre-feet of leased
Thornton effluent will replace depletions for November 2004 through March 2005. All leased effluent
will be released from the Metro Wastewater plant. Of the 54.8 acre-feet of lease water approximately
3.3 acre-feet will cover transit losses (0.5% per mile for the 13 miles from Metro Wastewater plant
outfall to the Bromley Lakes Pit). The 39 shares of the Fulton Ditch were historically used to irrigate 77
acres of alfalfa and grass. Assuming a 20% ditch loss and a 65% irrigation efficiency, the dry-year
consumptive use of the 39 shares was determined to be 68 acre-feet. A portion of the Fulton water
will be recharged back to the stream through the pit and a portion will be delivered directly back to the
river.