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Ms. Jennifer Lindahl Page 2 <br />Larimer Pit, M-74-069 and Mariana Butte Pit M-88-033 <br />March 14, 2008 <br />TABLE B -DEPLETIONS <br /> Evaporation Lost in Batch Dust New <br />Site Name Losses Product Concrete Control Total Permit <br /> (ac-ft) (ac-ft) (ac-ft) (ac-ft) (ac-ft) Required? <br /> 11.23 <br /> 0.49 (based (based on <br />Larimer Pit 35.69 on 16,488 122,000 3.83 51 <br />24 No <br /> tons) cubic . <br /> yards of <br /> concrete <br />Mariana Butte <br />Pit 7.11 0 0 0 7.11 Yes <br />Total 42.80 0.49 ~ 11.23 3.83 58.35 <br />An augmentation plan for the Larimer Pit and Mariana Butte Pit was filed with the Division 1 Water <br />Court in Case No. 2000CW142. Loveland Ready-Mix Concrete, Inc. ("LRM") has also obtained <br />storage water rights in Case No. 98CW431 for storage in two of the pits within the Larimer Pit site <br />identified as pits 16 and 17. There are a total of 19 separate pits in the Larimer Pit permit boundary. <br />Twelve of the pits (nos. 1-12) were exposed within the reclamation permit boundary prior to January <br />1, 1981. According to the information submitted, 82.47 acres of water surface, out of a total of 100.77 <br />acres exposed at the site, was exposed within the reclamation permit boundary prior to January 1, <br />1981. Four of the pits (nos. 4, 8, 10 and 19) have been mined and completely backfilled. Mining of <br />pits 16 and 17 has been completed and these pits have been lined and do not expose any ground <br />water. Loveland Ready-Mix Concrete, Inc. is currently mining pit 18 which will also be dewatered <br />during the mining process. All of the exposed ground water at the Larimer Pit site which requires <br />replacement for evaporation will occur at pit nos. 13, 14 and 18 (18.30 acres). Phreatophyte credits of <br />4.23 acre-feet per year have been applied to the calculated depletions from the Larimer Pit. <br />The Mariana Butte Pit is an inactive sand and gravel mining pit that was mined in the 1980's and <br />is located adjacent to the Larimer Pit. The surface area of the Mariana Butte Pit is approximately 5.91 <br />acres, of which 2.70 acres were exposed within the reclamation permit boundary prior to January 1, <br />1981. Therefore, all of the exposed ground water at the Mariana Butte Pit site which requires <br />replacement for evaporation will be 3.21 acres. <br />The source of replacement water for this combined plan will be from 120 Barnes Ditch inches <br />diverted from the Big Thompson River and previously used for irrigation of the mined property, 9.00 <br />acre-feet of Colorado-Big Thompson ("C-BT") Project water leased from the City of Loveland <br />("Loveland") and 20.53 acre-feet of fully consumable effluent leased from the City of Loveland. LRM <br />has 200 acre-feet of fully consumable effluent available from the City of Loveland pursuant to a lease <br />agreement dated January 13, 1998. The lease is valid until December 31, 2022. A copy of the lease <br />was provided to this office on July 19, 2007 and is attached to this letter. <br />The Barnes Ditch inches were changed for multiple uses in case no. 2000CW143 including <br />augmentation. The 120 Barnes Ditch inches were historically used to irrigate approximately 214.6 <br />acres which will need to be dried up this season. The historical consumptive use credit for the 120 <br />Barnes Ditch inches used in this plan is consistent with the decree in case no. 2000CW143. Based on <br />the average year diversion and return flow requirements, the irrigation season credits determined for <br />the entire 120 Barnes Ditch inches are 243.48 acre-feet with a winter return flow requirements of 6.70 <br />