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Amended Aggregate Industries South Platte Combined SWSP August 27, 2019 <br /> Plan I Ds 3614, 47731 3624, 47721 4616, 3437, 3376, 3650, 3668, and 5475 Page 4 of 21 <br /> the Platte Valley Pit. Once water enters the Broda Pond, some is <br /> pumped to the river to ensure the pond does not spill. There was a <br /> temporary cessation of dewatering in January 2018. The site will be <br /> dewatered continuously throughout 2019. <br /> Exposed Groundwater Surface: 5.0 acres <br /> Active Dewatering: YES <br /> Platte Valley Pit Status: Mining operations at the Platte Valley Pit are not anticipated to <br /> (South Platte occur in 2019, though reclamation activity consisting of backfi lli ng <br /> Mainstem) portions of the site will continue in 2019. Depletions covered by this <br /> SWSP include water lost due to evaporation, dust control, and concrete <br /> batchi ng. Water for concrete batchi ng will come from Well Permit No. <br /> 13410-F-R (WDID 0207073). Note that the water right for this well was on <br /> the division engineer's 2010 Decennial Abandonment List, but the well <br /> may still be used in accordance with its permit as long as all depletions <br /> are treated as junior to all other vested water rights in accordance to <br /> this SWSP and the well complies with the South Platte Well Measurement <br /> Rules. <br /> Exposed Groundwater Surface: 60.0 acres <br /> Active Dewatering: No <br /> Distel Pit Status: Mining operations at the Distel Pit were completed in 2011 and <br /> (St. Vrain River) reclamation is in progress. In 2017, Aggregate used water from the Distel <br /> site as a water supply for a portable ready-mixed plant located at the <br /> site for a short-term job. Depletions covered by this SWSP include water <br /> used for dust control, and lagged depletions from past concrete batching <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 Groundwater 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. Vrain River) 2019. 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 2019. <br /> Exposed Groundwater Surface: 1.0 acre <br /> Active Dewatering: YES <br /> W.W. Farms Pit Status: Mining operations at the W.W. Farms Pit (aka Riverview <br /> (Lower Poudre River) Resources) are anticipated to continue in 2019. Depletions covered by <br /> this SWSP include water lost due to evaporation, aggregate production, <br /> dust control, and dewatering. During Spring of 2011 the pit was flooded <br /> by the Poudre River due to the high spring runoff conditions. Ongoing <br /> dewatering has reduced the exposed surface area at the site. The entire <br /> remaining exposed surface area will be assessed evaporative losses as <br />