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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 2 of 21 <br /> reclamation of the site and ownership was transferred to the City of Thornton. The only consumptive use of water under <br /> DRMS permit no. M-1999-034 is associated with the Jeronimus Pit. <br /> b 5.6 acres exposed after December 31, 1980 and 14.7 acres exposed prior to January 1, 1981. <br /> The City of Longmont has assumed the augmentation responsibilities for lagged and future depletions from evaporation <br /> and consumptive use by wetlands vegetation at this site under their plan for augmentation decreed in case no. 09CW271. <br /> The general location of the mining sites are identified in Table B below and depicted on the <br /> attached Figure 1. <br /> Table B - Pit Locations <br /> Site Name Location <br /> Jeronimus Pit Section 16, T2S, R67W <br /> Hazeltine Pit Section 9, T2S, R67W <br /> Brighton Pit Sections 14 and 23, T1S, R67W <br /> Tucson South Pit Sections 1 and 12, T1 S, R67W <br /> Wattenberg Pit Sections 25 and 36, T1 N, R67W; Section 30, T1 N, R66W <br /> Platte Valley Pit Section 30, T1 N, R66W <br /> Distel Pit Sections 7, 8, 91 17 and 18, T2N, R68W <br /> Tull Pit Sections 9, 16 and 17, T2N, R68W <br /> W.W. Farms Pit Sections 32 and 33, T6N, R66W <br /> F-Street Pit Sections 34 and 35, T6N, R66W <br /> This SWSP previously included the Teti Pit (WDID 0203027) and the North Dahlia Pit (WDID <br /> 0203028). A plan for augmentation for these two sites was decreed in water court case no. <br /> 2007CW198 on December 17, 2013 and all depletions from these sites will be replaced under the <br /> decreed plan for augmentation. It is noted that the East 8t" Street Pit (M-2000-082, WDID 0303016) is <br /> no longer a part of this Combined SWSP. Aggregate sold this pit to Superior Oilfields and as of <br /> November 2012 this pit is no longer covered by Aggregate. All depletions impacting the river are now <br /> covered under the East 8t" Street SWSP (WDID 0302562). <br /> The Tucson Pit (M-1991-140, WDID 0203033) was previously included in this SWSP. Mining <br /> operations at the Tucson Pit have been completed, and a request for a full performance and financial <br /> warranty release for the Tucson Pit was approved by the DRMS on April 29, 2016. A portion of the pit <br /> (Rogers Reservoir, WDID 0203917) has been lined with a slurry wall and has obtained SEO liner <br /> approval. All post-pumping depletions have been replaced under previous SWSPs. The remaining <br /> 2.0-acre pond is located within the boundaries of the Tucson South Pit and will be accounted for and <br /> reclaimed under that permit. <br /> A summary of the pit operations at each of the ten (10) sites remaining in this SWSP is <br /> provided below. <br /> Jeronimus Pit Status: Mining operations at the Jeronimus Pit are complete. Operations <br /> (South Platte on-site include backfilling of the pit with inert fill. Depletions covered <br /> Mainstem) by this SWSP are limited to water lost due to evaporation. The total <br /> surface area exposed at the site is 20.3 acres, of which 14.7 acres were <br /> exposed to the atmosphere prior to January 1, 1981. The 14.7-acre area <br /> exposed at the Jeronimus Pit prior to 1981 is tied to the location as <br /> shown on the exhibit dated January 31, 2011 as provided in the 2011 <br /> SWSP. The credits for the pre-1981 area are tied to the location <br /> identified on that map and may not be re-allocated to other areas of <br /> groundwater exposure within the gravel pit permit boundary. <br /> Exposed Groundwater Surface: 5.6 acres post-81, 14.7 acres pre-81 <br />