2009-12-22_HYDROLOGY - M1977436 - Laserfiche WebLink

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Jared Dains South Platte Combined Replacement Plan. December 21, 2009 Page 4 feet is estimated based on the exposed surface area of 4 acres and the depth of the pit of 15 feet. The fill is anticipated to occur over a period of two months. The final reclamation plan for each site, the bond amount and the water commitment to replace depletions in the event that the operator ceases dewatering and walks away from the site is shown in Table 3 below. Table 3 Site Name DMG # Proposed Final Reclamation Bond Amount Ditch Rights Committed /Comments Teti Pit M -99 -090 ground water Lake $77,600 2007CW198- pending North Dahlia Pit M -94 -093 lined reservoir $811,100 Aggregate backfilled a portion, a small groundwater lake remaining on the site that will be covered by 2007CW198- endin Jeronimus Pit iii -75 -039 backfilled $32,500 none Hazeltine Pit M -04 -031 lined reservoir $670,602 none Brighton Pit M- 77-436 lined reservoir $1,579,400 none Tucson.South Pit M -04 -044 lined reservoir $1,054,203 none Tucson Pit M -91 -140 lined reservoir $811,000 none Wattenberg Pit M -01 -008 lined reservoir $3,617,200 Westminster 1998 Lease (294.79 ac-ft) Platte Valley Pit M -89 -120 backfilled $754,732 none Distel Pit M -89 -029 ground water Lake $1,483,800 52.5% Coffin & Davis Ditch (172.2 ac -ft CU) Tull Pit M -94 -027 ground water Lake $5,000 1 Share Smith & Emmons Ditch (61.1 ac-ft) W.W. Farms Pit M -99 -098 lined reservoir $155,480 13.5 Shares of Whitney Ditch (186.21 ac -ft CU F- Street Pit R1 -92 -069 ground water Lake $249,008 240 Shares Boyd & Freeman (99.28 ac -ft CU East 8th Street Pit M -00 -082 ground water Lake $226,000 City of Greeley has long term augmentation responsibili Currently Aggregate is dewatering at the Hazeltine Pit, Brighton Pit, W.W. Farms Pit, Tucson Pit and Distel Pit. All of the dewatering water is returned to the river, either directly or via a drainage channel. All dewatered water must be delivered to the river without consumption. Platte Valley Pit, F- Street Pit and East 8th Street Pit have ceased dewatering. Depletions The depletions resulting from evaporation, water lost in product, dust control and concrete batching are shown in Table 4 below: Table 4 Dust Concrete Total Lagged Evaporation Lost in Product Control Batching Total Depletions Site Name ac -ft ac -ft ac -ft ac -ft ac -ft (ac -ft) Teti Pit 19.94 0.00 0.00 0.00 19.94 19.94 North Dahlia Pit 9.09 0.00 0.00 0.00 9.09 9.39 Jeronimus Pit 24.91' 0.00 0.00 0.00 24.91 25.60 Hazeltine Pit 6.16 19.43 660,000 tons 1.98 0.00 27.57 - 37.68 " "'