2003-01-07_REVISION - M1974069 (2)

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STATE OF COLORADO OFFICE OF THE STATE ENGINEER Division of Water Resources Department of Natural Resources 1311 Sherman Street, Room 8I8 Denver, Colorado 80203 Phone: 1303) 866-3581 FA3: 6031866.3589 httpJhvatecstate.co. us/deiaulLhtm Ms. Jennifer S. Lindahl, P.E. Bishop-Brogden Associates, Inc. 333 West Hampden Ave., Ste. 1050 Englewood, CO 80110 RE: Lorimer Pit Substitute Water Supply Plan, DMG /174-069 Sections ? 5, 16 and 17, TSN; R69l~r, 6th P.rn. Water Division 1 , Water District 4, Lorimer County Dear Ms. Lindahl: Greg E. Walther Executive Director Hal D. Simpson, P.E. State Engineer We have received your letter of January 24, 2000, requesting renewal of the above referenced substitute water supply plan to cover depletions caused by an existing gravel mining operation. The anticipated net depletion for this plan is 46.68 acre-feet per year for a total of 46.38 acres of water surface to be exposed after December 31, 1980. Of these 46.38 acres, 22.89 acres are currently exposed, and it is anticipated that the net exposed surface area will remain at 22.89 acres through this extension. According to the information submitted, 82.47 acres of water surface, out of a total of 128.85 to be exposed at the site, was exposed within the reclamation permit boundary prior to January 1, 1951. You have provided a monthly breakdown of the depletions for this year of operations from Marr,h of 2000 through Febru~n; of 2001. The dep!e*.ions tcta! 23.88 acre-feet of net evaporative loss, 15.32 acre-feet of water used to batch concrete (which represents production of 166,41 5 cubic yards of concrete), 2.08 acre-feet of water lost with mined product (which represents 70,616 tons of mined productl, and 5.40 acre-feet cf water used for dust control. Phreatophyte credits of 5.29 acre-feet per year ha~.-e lase.^. applied to this plan. The ISroposed sources of replacement water for this pit are 29.3 Barnes Ditch inches diverted from the Big Thompson River and previously used for irrigation of the mined property and 60.7 units of Colorado-Big Thompson Project water owned by Loveland Ready Mix. The Barnes Ditch inches, from dry-up of approximately 44.8 acres of alfalfa and barley, provide a dry year total of 48.18 acre-feet of historic net stream depletions during May through October, and carry an historic return flow obligation of 1.55 acre-feet during November through April. Replacements during May through October will be made by diverting the Barnes Ditch water, measuring it, and then returning it to the Big Thompson River. Adequate flow measuring devices, satisfactor/ to the Water Commissioner, must be installed for the administration of this replacement water from the Barnes Ditch. Replacement for depleticns during P:cvember through April, plus shortages OF'~ `O q 4 ' ~~~1~~~7~in k'$ April 18, 2000 ri,irq ? 3 ?);r1,r. •`F/e76 ~• Bill Owens _ ~-_____- ... Governor