2009-04-03_HYDROLOGY - M1977436 - Laserfiche WebLink

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Jared Dains South Platte Combined Replacement Plan April 2, 2009 Page 3 Mining and reclamation of the Teti Pit is complete leaving exposed ground water requiring a permanent plan for augmentation. Aggregate filed an application with the water court for a permanent plan of augmentation under case no. 2007CW198. Until such time as a decree is entered in that case, Aggregate will replace depletions from the Teti Pit under this SWSP. Mining at the. Platte Valley Pit was completed in 2006. The site has filled with ground water and as mining progresses across the river at the Wattenberg Pit, Aggregate will backfill the Platte Valley Pit with fines produced from the Wattenberg Pit. Ultimately the entire site will be backfilled. Aggregate has not yet begun to actively mine the Wattenberg Pit as stated in previous reports and dewatering has not begun at the site. However, there is currently 1.7 acres of ground water exposed at the site and depletions resulting from evaporation will be replaced under this SWSP. Mining of the North Dahlia Pit is complete and Aggregate has backfilled a portion of the existing lake leaving approximately 3.5 acres of exposed ground water at the site. Aggregate amended the water court application for a plan for augmentation in case no. 2007CW198 to include the remaining 3.5 acres exposed at the North Dahlia Pit. Until such time as a decree is entered in that case, Aggregate will replace depletions from the North Dahlia Pit under this SWSP. The Jeronimus Pit is complete and Aggregate is currently filling in the lake at the site with fines from the Hazeltine Pit. Ultimately the entire site will be backfilled. Aggregate has completed mining at the F-Street Pit and is in the process of reclaiming the site. The dewatering pumps were turned off in 2008 and the post pumping depletions associated with that activity was accounted for in the 2008 SWSP and will continue to be accounted for in this SWSP: Aggregate is working with the landowner and expects to transition the land back to him within the next three years after the reclamation is complete. 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 b 2007CW198- endin Jeronimus Pit M-75-039 backfilled 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 $994,423 none Tucson Pit M-91-140 lined reservoir $811,000 none Wattenberg Pit M-01-008 lined reservoir 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 52.5% Coffin & Davis Ditch (172.2 ac-ft CU) TUII Pit M-947027 groundwater Lake 1 Share Smith & Emmons Ditch (61.1 ac-ft )