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^r <br />Mr. Richard Raines March 17, 2009 <br />Middle Poudre Combined Plan - Lafarge West, Inc. Page 3 of 9 <br />accounting to include the transit losses of the dewatering water from the Shields Mine and <br />provide additional replacement water to replace those transit losses. <br />Note, that due to a change in administration of evaporation from ground water exposed to the <br />atmosphere prior to 1981, pre-1981 credits will no longer be allowed for gravel pits which exposed ground <br />water to the atmosphere prior to 1981 and were actively mined on or after January 1, 1981. Accordingly, <br />evaporative depletions for such gravel pits will need to be replaced from the entire surface area of the <br />ground water exposed in the pits. In order to allow owners and operators of the affected pits time to <br />comply with this change in the administration requirements, the owners and operators will have until <br />January 1, 2010 to comply with the replacement requirements. If the area included in the DRMS mining <br />permit site contains individual gravel pit ponds that were not altered or mined after December 31, 1980, you <br />may still be able to maintain the "pre-81" credit provided you can document when mining in the individual <br />ponds ceased. The Applicant is hereby notified that in accordance with the above described change <br />in administration, the evaporation from ground water exposed prior to 1981 must be replaced after <br />January 1, 2010 in any subsequent SWSP renewal for the gravel pits listed in Table A that have <br />ground water exposed prior to 1981. <br />Depletions <br />The depletions resulting from evaporation, water lost in product, dust control and concrete batching <br />are shown in Table B below: <br />TABLE B - DEPLETIONS <br /> Evaporation Product Dust Concrete Total Current New <br />Site Name Loss Moisture Control Batching Lagged Well Permit <br /> (ac-ft) Loss (ac-ft) (ac-ft) (ac-ft) Permit Required? <br /> ac-ft <br />Greeley 14.7 No <br />35th Avenue 59.3 (500,000 2.00 8.8* 85.41 61516-F <br />Pit tons) <br /> <br />st <br />0 <br />00** <br />0 <br />00 *** <br />1'08 <br />0.00 <br />1.12 <br />53509-F <br />No <br />Rigd <br />Pit . . <br />Three Bells 79.1 14.7 <br />(500,000 <br />2.00 <br />0.00 <br />97.10 <br />64818-F No <br />Pit tons) <br />Weitzel Pit 135.1 0.00 0.00 0.00 134.97 64642-F No <br />Kyger Pit 25.2 0.00 0.8 0.00 26.69 53502-F No <br />o <br />t 4 <br />65 0 0 0.00 65.46 60890-F No <br />r <br />Pit <br />E . <br />Shields 14.7 <br /> 1.7 (500,000 2.00 0.00 16.15 65095-F No <br />Mine tons <br />Total 366.00 44.10 7.88 8.88 426.9 <br />* to be withdrawn from well permit no. 47856-F <br />**23 acres currently exposed which is less than the 25 pre-81 area <br />**0.08 acre-feet for the office septic system