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Jared Dains <br />South Platte Combined Replacement Plan <br />January 9, 2013 <br />Wattenberg Pit <br />(South Platte Basin) <br />Platte Valley Pit <br />(South Platte Basin) <br />Distel Pit <br />. (St. Vrain Basin) <br />Tull Pit <br />(St. Vrain Basin) <br />Page 4 <br />Status: Mining operations at the Wattenberg Pit were on hold but are <br />anticipated to start up in June 2013. Depletions covered by this SWSP <br />include water lost due to evaporation, aggregate production and water <br />pumped for dust control. Dewatering will commence in March 2013 at an <br />anticipated pumping rate of 1,000 gpm. For the purposes of this SWSP's <br />projected depletions it has been assumed that the exposed ground water <br />will remain at 16 acres for the duration of the SWSP. <br />Exposed Ground Water Surface: 16.0 acres <br />Active Dewatering: Yes (starting March 2013) <br />Status: Mining operations at the Platte Valley Pit are not anticipated to <br />occur in 2013, though reclamation activity consisting of backfilling portions <br />of the site may occur in 2013. No backfilling occurred in 2012 and for the <br />purposes of this SWSP's projected depletions it was assumed that no <br />backfilling would occur in 2013. Depletions covered by this SWSP include <br />water lost due to evaporation, dust control and concrete batching. Water <br />for concrete batching will come from Well Permit No. 13410 -F -R (WDID <br />0207073). It should be noted this well's water right was on the division <br />engineer's 2010 Decennial Abandonment List but it may still be used in <br />accordance with its permit as long as all depletions are treated as junior to <br />all other vested water rights. <br />Exposed Ground Water Surface: 78.8 acres <br />Active Dewatering: No <br />Status: Mining operations at the Distel Pit were completed in 2011 and <br />reclamation is in progress. Depletions covered by this SWSP include <br />lagged depletions from dust control, dewatering, and past aggregate <br />production. Dewatering operations are expected to remain continual and <br />constant at a rate of 1,100 gallons per minute while reclamation activities <br />continue. The City of Longmont has assumed the augmentation <br />responsibilities for lagged and future depletions of evaporation. Longmont <br />has filed an augmentation plan in water court (case no. 09CW271) and is <br />responsible for obtaining a separate SWSP in conjunction with their court <br />case. <br />Exposed Ground Water Surface: 69.2 acres (Longmont's responsibility) <br />Active Dewatering: Yes <br />Status: Mining operations have not started at Tull Pit. Depletions covered <br />by this SWSP include water lost due to evaporation and dust control. In <br />preparations for mining at a future date, Aggregate will construct a <br />jurisdictional wetland which will result in the exposure of 0.5 acres of <br />groundwater. <br />Exposed Ground Water Surface: 0.5 acres <br />Active Dewatering: No <br />