HYDRO23433

• Permit No: M1981022
• IBM Index Class Name: Hydrology
• Doc Date: 10/23/2006
• 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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~~' ~ STATE OF COLORADO
OFFICE OF THE STgTE ENGINEER of c
Division of Wa[er Resources RO
Department of Natural Resources he i
1313 Sherman Street, Room 818 ~ ~ ~
Denver, Colorado 80203 !F'* ~°"' F°'> "'° 2 ~ A°'"' ~ x x t 9~e x ~
Phone [phone] October 20, 2006
FAX [phone]
CT ~ n Z~~o BiC l~Owens
www.waterstate.co.us ~ L
Division of R~c'amation, ~'~n ~01~
Ms. Michelle Austin y~ &ecuuve olrector
Applegate Group Inc. 'Iv lriininfl anu Safety Hal D. Sim
peon, P.E.
1499 West 120' Avenue, Suite 200 s~f eig1nef
Denver Co 80234-2728
f
RE: Substitute Water Supply Plan, G.L. Pit, (DRMS# M-81 22)
N 714 Section 3, T7N, R69W, 6th P.M.
Water Division 7, Water District 3, Larimer County
Approval Period: November 1, 2006 through OctrSber 37, 2007
Contact Phone Number for Ms. Michelle Austin: 303-452-6611
Dear Ms. Austin:
Your letter dated September 19, 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 March 26, 1993 and was most recently
renewed on October 25, 2005. 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 Engineers 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, no additional
backfilling of the site took place in 2006. Connell Resource, Inc. will continue backfilling the site
when material is available nearby and is cost effective to transport to the site.
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 9.7 acre-feet of evaporation from 6.4 acres of
exposed water surface area of which 5.5 acres have a phreatophyte credit.
The G. L. Pit is located approximately 1700 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 lagged depletions totaling 9.8
acre-feet of evaporative loss. The amount of lagged depletions is greater than the actual depletions
because it accounts for the post pumping depletion effects from previous years.
The proposed source of replacement water for this pit is a lease of 10.5 acre-feet of fully
consumable water from the Tri-Districts. The lease is for the period of November 2006 through
October 2007. A copy of the Tri-Districts lease was provided to this office on October 17, 2006 and
is attached to this letter. The replacement waterwill originate from Sand Creek Ditch, which can only
deliver transbasin water to Eaton Reservoir during the warm months of the year. The Tri-Districts
have water stored in low elevation reservoirs to make replacement during all month of the year in