HYDRO23274

• Permit No: M1979097
• IBM Index Class Name: Hydrology
• Doc Date: 9/30/2005
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: DMG
• Media Type: D
• Archive: No

OFFICE OF THE STATE ENGINEER
Division of Water Resources
Department of Natural Resources
1313 Sherman Street, Room 818
Denver, Colorado 80203
Phone [phone]
FAX [phone]
www.watecstate.co.us
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September 30, 2005
Mr. Richard T. Raines ,!1
Applegate Group, Inc. "lam
1499 West 1201h Ave., Suite 200
Denver, Colorado 80234-2728 ~~
RE: East Rigden Pit Substitute ater Supply Plan, M-79-1)97
Section 28, T7N, R68W, 6th P.M.
Water Division 1, Water District 3, Larimer County
Approval Period: November 1, 2005 through October 31, 2008
Dear Mr. Raines:
Bill Owens
Governor
Russell George
Ezetutlve DlreCtor
Hal D. Simpson, P.E.
State Engineer
Your letter dated August 29, 2005, 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 $217 for the renewal of this substitute water supply plan has been submitted. The original
plan was approved on January 9, 1992, and was most recently renewed on September 22, 2004.
It should be noted that mining has been completed at the East Rigden site and construction of a
clay reservoir liner is in process on the property. Currently, the site is being dewatered at a rate of
approximately 500 gallons per minute. In addition, mined material is no longer conveyed from the adjacent
Resource Recovery Farm site to be processed at the East Rigden facility. A storage water right for the
East Rigden Pit was filed in the Division 1, Water Court in case no. 2001 CW202.
Lafarge leases the property from Flatiron Companies ("Flatiron"). Flatiron provides the water rights
for the augmentation at this site. In a letter dated December 30, 2005, Flatiron has notified this office that
Lafarge has completed the mining at the East Rigden Pit and any additional mining will likely be done by
Flatiron. The total exposed surface area at this site is 23.2 acres. According to the information submitted,
25 acres of water surface was exposed within the reclamation permit boundary prior to January 1, 1981.
Since the current exposed area is less than the area exposed prior to January 1, 1981, there is no
evaporation augmentation requirement at this site, for this approval period. The anticipated consumptive
use at this site consists of 1 acre-foot for dust suppression and 0.08 acre-feet for the office/asphalt
production plant septic system. The replacement requirement for this approval period is 2.2 acre-feet,
which accounts for the lagged depletions from consumptive use during this plan period and lagged
depletions accruing to the river from previous operations.
The proposed source of replacement water for this pit is one Box Elder Ditch share, which will be
recharged into a 7.9-acre pond located on the property. The 7.9-acre pond is included as part of the total
23.2 acres of pond surface area at this site and was created as a result of the mining operation. The Box
Elder Ditch share consumptive use was diverted into the pond during the 2005 irrigation season and is
part of the 8 shares that were historically used to irrigate 222.7 acres of corn, alfalfa and pasture grass at
the East Rigden site. The 222.7 acres historically irrigated by the referenced 8 shares of the Box Elder
Ditch have been taken out of the production. The historical use of the 8 Box Elder Ditch shares is