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South Platte Combined Replacement Plan <br />March 1, 2017 <br />Page 4 of 19 <br />Exposed Ground Water Surface: 75.6 acres <br />Active Dewatering: No <br />Distel Pit Status: Mining operations at the Distel Pit were completed in 2011 and <br />(St. Wain River) reclamation is in progress. Aggregate plans to use water from the Distel <br />site as a water supply for a portable ready -mixed plant to be located at <br />the site for a short-term job. Depletions covered by this SWSP include <br />water used for concrete batching, lagged depletions from dust control <br />and past aggregate production, and post -pumping depletions from past <br />dewatering. Dewatering at the site ceased due to flooding in September <br />2013, and Aggregate currently has no plans to reactivate dewatering. <br />The City of Longmont has assumed the augmentation responsibilities for <br />lagged and future depletions from evaporation and consumptive use by <br />wetlands vegetation at the site under their plan for augmentation <br />decreed in case no. 2009CW271. <br />Exposed Ground Water Surface: N/A (augmented under case no. <br />2009CW271) <br />Active Dewatering: No <br />Tull Pit Status: Mining operations are anticipated to continue at the Tull Pit in <br />(St. Yrain River) 2017. Depletions covered by this SWSP include water lost due to <br />evaporation, dust control, aggregate production, and dewatering. The <br />site will be dewatered continuously throughout 2017. <br />Exposed Ground Water Surface: 1.0 acre <br />Active Dewatering: YES <br />W.W. Farms Pit Status: Mining operations at the W.W. Farms Pit (alfa Riverview <br />(Lower Poudre River) Resources) are expected to continue to be on hold for this pian period. <br />Depletions covered by this SWSP include water lost due to evaporation, <br />dewatering, dust control, and concrete batching. During Spring of 2011 <br />the pit was flooded by the Poudre River due to the high spring runoff <br />conditions. Ongoing dewatering has reduced the exposed surface area at <br />the site. The entire remaining exposed surface area will be assessed <br />evaporative losses as this is an unlined pit. Dewatering operations are <br />expected to remain continual and constant during this plan period. Note: <br />The Applicant has obtained a decreed plan for augmentation in water <br />court case no. 1990CW23 to cover evaporation from up to 66 acres of <br />exposed water surface area in one or more unlined ponds remaining at <br />the site post mining; however, since final reclamation of the site has not <br />yet occurred, all depletions from this pit will continue to be replaced <br />under this SWSP during this plan period. <br />Exposed Ground Water Surface: 36.0 acres <br />Active Dewatering: YES <br />F -Street Pit Status: Mining operations at the F -Street Pit are complete and <br />(Lower Poudre River) reclamation is in progress. Depletions covered by this SWSP are limited <br />to water lost due to evaporation, as lagged dewatering and operational <br />depletions are no longer accruing to the river. <br />Exposed Ground Water Surface: 26.2 acres <br />Active Dewatering: No <br />Office of the State Engineer <br />1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 U <br />www.water.state,coms <br />+ l87b a <br />