2008-10-15_HYDROLOGY - M1981022

• Permit No: M1981022
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/15/2008
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

DEPARTMENT OF NATURAL RESOURCES
DIVISION OF WATER RESOURCES
Mr. Richard Raines
Applegate Group, Inc.
1499 West 120th Avenue, Suite 200
Denver Co 80234-2728
October 7, 2008 A-le
RE: Substitute Water Supply Plan, .L. Pit, (DRMS# M-81-022)
NW1/4 Section 3, T7N, R69W, 6th P.M.
Water Division 1, Water District 3, Larimer County
Approval Period: November 1, 2008 through October 31, 2009
Contact Phone Number for Mr. Richard Raines: 303-452-6611
Dear Mr. Raines:
Bill Ritter, Jr.
Governor
Harris D. Sherman
Executive Director
Dick Wolfe, P.E.
Director
RECEIVED
OCT 15 Z008
Division of Reciamavori,
Mining and Safety
Your letter dated September 9, 2008, 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 March 26, 1993 and was most recently renewed on
January 14, 2008. As indicated in the previous approval letter, Connell Resources, Inc. has begun
the process of backfilling this site above the groundwater table to remove the long-term
augmentation requirement. In a letter dated April 23, 2003, the State Engineer's Office allowed the
site to be operated under a substitute water supply plan until such time that the pit has been
completely backfilled. Connell Resources, Inc. has amended their DMG permit to reflect that the
groundwater pond will be backfilled completely. According to the information provided, backfilling of
the site restarted again in August 2008. Note that all ground water at this site was exposed after
December 31, 1980.
Please note that the approval of this substitute water supply plan does not relieve the
Applicant and/or the landowner of the requirement to obtain a water court decree approving
a permanent plan for augmentation or mitigation to ensure the permanent replacement of all
depletions, including long-term evaporation losses and lagged depletions after gravel mining
has ceased. In the previous plan we indicated that renewal of this plan is contingent on the
Applicant demonstrating that the backfilling of the site has continued or contingent upon the
Applicant filing an application for a plan for augmentation with the Division 1 Water Court by
October 31, 2008 that includes, long-term evaporation losses at the G. L. Pit site. Based on
the information provided it was determined that the Applicant has satisfied the above
requirement.
The only consumptive use associated with the G.L. pit site will be from evaporation of
exposed groundwater. The current exposed surface area at the G.L. Pit remains at 6.4 acres. Total
estimated annual consumptive use for this plan is 9.8 acre-feet of evaporation from 6.4 acres of
exposed water surface area of which 5.5 acres have a phreatophyte credit. For the 5.5 acres an
evaporative value of 16.76 inches was used. The evaporative depletions from the 5.5 acres are 7.7
acre-feet. The remaining 0.9 acres of the total 6.4 acres exposed at the site create an evaporative
depletion without phreatophyte credit. The evaporative depletions from the 0.9 acres are based on
Office of the State Engineer
1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: [phone] • Fax: [phone]
www.water.state.co.us