2007-05-14_HYDROLOGY - M1977184

• Permit No: M1977184
• IBM Index Class Name: Hydrology
• Doc Date: 5/14/2007
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: City of Fort Collins
• Media Type: D
• Archive: No

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OFFICE OF THE STATE ENGINEER
Division of Water Resources
Department of Natural Resources
1313 Sherman Slreet, Room 818
Denver, Colorado 80203
Phone [phone] ,
F:VC [phone]
htlp7!www watecstate.co.us
STATE OF COLORADO
May 14, 2007
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Bill Ritter. Jr.
Governor
Ms. Susan Smolnik, P.EJ Divisiono .._..,.~~ ilOn,
City of Fort Collins ~~// iviining and Ssfciy H.~rfIS ~. SherT3r1
Execwive Director
700 Wood Street Ha10. Simpson, P E.
P.O. Box 580 State Engineer
Fort Coll
ns, Co 80522-0580
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RE: /Substitute Water Supply Plan Renewal, Timberline Pit, DRMS Permit No. M77-184
Section 18, T7N, R68W, 6th P.M.
Water Division 1, Water District 3, Larimer County
Approval Period: May 1, 2007 through April 30, 2009
Contact Phone Number for Ms. Susan Smolnik: 970-221-6700
Dear Ms. Smolnik:
Your letter dated March 12, 2007, requesting renewal of the above referenced substitute
water supply plan to cover evaporation depletions for the Timberline Gravel Pit, 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 March 19, 1992 and it was most recently renewed on May 20,
2005.
The anticipated net depletions for this plan are 54.5 acre-feet per year for a total of 23.5
acres of lake surface exposed after December 31, 1980. According to the information submitted,
39.9 acres of water surface, out of a total of 63.4 acres exposed at the site, were exposed within the
reclamation permit boundary prior to January 1, 1981. A monthly breakdown of the annual
depletions totaling 54.5 acre-feet of evaporative loss was provided with this plan and is shown on
the attached Table I.
Mining at the Timberline Pit site has been completed and reclamation of the site will create
an unlined reservoirwith exposed ground water. On October 31, 2005, an application for a plan for
augmentation was filed with the Division 1 Water Court, in case no. 2005CW262, to include, but not
be limited to, long-term evaporation losses. Approval of this plan does not imply approval by this
office of any related litigation.
The proposed source of replacement water for this plan is 43.4 acre-feet of historical net
stream depletions from four shares of the Box Elder Ditch. The Box Elder Ditch shares from the dry-
up of approximately 222.7 acres of alfalfa, corn and pasture grass provide a dry year total of 223.7
acre-feet of historical net stream depletions during May through October. The acreage dried-up will
need to be documented to the satisfaction of the water commissioner and division engineer.
Replacement for depletions during November through April, plus shortages during months with
insufficient credits will be met either from released water from Joe Wright reservoir or the City's
reusable effluent. A total of 11.1 acre-feet are required in addition to the 43.4 acre-feet of