2005-05-20_HYDROLOGY - M1977184

• Permit No: M1977184
• IBM Index Class Name: Hydrology
• Doc Date: 5/20/2005
• Doc Name: Substitute Water Supply Plan Renewal
• From: OSE
• To: City of Fort Collins
• Media Type: D
• Archive: No

STATE OF COLORADO
OFFICE OF THE STATE ENGINEER / of cote
Division of Water Resources v ~ rF'
Department of Natural Resources May 20, 2005 ~
1313 Sherman Street, Room 818 ~ s
Denver, Colorado 80203 ` re~e `
Phone [phone]
fAx [phone] Bill Owens
www.watecstate.[o.us Governor
Ms. Susan Smolnik, P.E. Russell eeorge
City of Fort Collins Exewtlve Director
Hal D. Simpson, P.E.
700 Wood Street State Engineer
P.O. Box 580
Fort Collins, co 80522-0580 / /
RE: Substitute Water Supply Plan Renewal, Timberline Pit, DMG #77-184
Section 18, T7N, R68W, 6th P.M. ~/ ~. ~~~ /
Water Division 1, Water District 3, Larimer County y
Expiration date: October 31, 2005 or April 30, 2007 (subject to condition 1)
Dear Ms. Smolnik:
Your letter dated April 22, 2005, 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 $217 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 April 25, 2003.
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. The applicant was required to file for a
permanent plan for augmentation with the Water Court by the expiration date (April 30, 2005)
of the previous substitute water supply plan to include to the long-term evaporation losses.
You have stated that the City of Fort Collins is intending to file for a plan for augmentation
within the next few months. To allow additional time for filing, the deadline for submitting an
application for a plan for augmentation is hereby extended to October 31, 2005 by way of this
letter. 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