HYDRO20926

• Permit No: M1977081
• IBM Index Class Name: Hydrology
• Doc Date: 11/8/2006
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Correspondence
• Media Type: D
• Archive: No

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RE: Substitute Water Suppiy
Section 36, T6N, R66W, 6th P.M.
Water Division 1, Water District 3, Weld County
Approval Period: November 1, 2006 through October 31, 2007
Contact Phone Number Ior Mr. Richard Raines: 303.452-6611
Dear Mr. Raines:
Your letter dated September 15, 2006, requesting renewal of the above referenced
substitute water supply plan to cover depletions caused by an existing gravel mining operation has
been reviewed. The required fee of $257 for the renewal of this substitute water supply plan has
been submitted. The original plan was approved on January 14, 1992 and it was most recently
renewed on October 25, 2005.
The Greeley West Pit is still owned by flatiron Companies ("Flatiron") and is leased to
Lafarge for mining. In an agreement with Flatiron, the City of Greeley assumed the long-term
augmentation responsibility for the Greeley West Pit. The total exposed pond surface area at this
site is 75.2 acres. According to the Information from the previous plan, a total of 45.5 acres of pond
surface was exposed within the Greeley West reclamation permit boundary poor to January 1, 1981.
This results in 29.7 acres of exposed surface area requiring augmentation. Thus the anticipated net
depletion for this plan ~s 86.9 acre-feet per year. Evaporation is the only consumptive use of water at
this site. It is anUCipaled That mining will resume at this site once the operator, Lafarge West, Inc.,
completes mining activities at the nearby 35"'Avenue Pit site (M-77-036}. No dewatering is provided
or sought under this plan.
The Greeley West Pit is located approximately 350 feet from the Cache La Poudre River,
thus depletions were not assumed to be instantaneous and have been lagged back to the Cache La
Poudre River. You have provided a monthly breakdown of the annual depletions totaling 86.9 acre-
feet of evaporative loss. No phreatophyte credit has been applied to this plan.
The proposed sources of replacement water for this pit are 7 shares of the Greeley Canal
No 3 during the irrigation season and 41.8 acre-feet of fully consumable water provided by the City
of Greeley during the non-imgation season. The point of replacement for the water provided by the
City o(Greeley will be the Greeley Wastewater Treatment Plant. A copy of the lease agreement with
the City of Greeley for 41.3 acre-feet of consumable effluent from Greeley's wastewater plant was
provided to this office on October 26, 2006 and is attached to this letter.