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Aggregate Industries South Platte Combined SWSP April 13, 2018
<br />Plan IDs 3614, 4773, 3624, 4772, 4616, 3437, 3376, 3650, 3668, and 5475 Page 2 of 20
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<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
<br />financial warranty release for the Tucson Pit was approved by the DRMS on April 29, 2016. A portion
<br />of the pit (Rogers Reservoir, WDID 0203917) has been lined with a slurry wall and has obtained SEO
<br />liner approval. All post-pumping depletions have been replaced under previous SWSPs. The
<br />remaining 2.0-acre pond is located within the boundaries of the Tucson South Pit and will be
<br />accounted for and reclaimed under that permit.
<br />The general location of the mining sites are identified in Table B below and depicted on the
<br />attached Figure 1. The required fee of $2,570 (10 sites × $257/site renewal fee) has been received
<br />(receipt no. 3684084).
<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, T1S, R67W
<br />Wattenberg Pit Sections 25 and 36, T1N, R67W; Section 30, T1N, R66W
<br />Platte Valley Pit Section 30, T1N, R66W
<br />Distel Pit Sections 7, 8, 9, 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
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<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 8th 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 the
<br />responsibility of Superior and are now covered under Superior’s SWSP (WDID 0302562). A summary of
<br />the pit operations at each of the eleven sites remaining in this SWSP is provided below.
<br />Jeronimus Pit
<br />(South Platte
<br />Mainstem)
<br />Status: Mining operations at the Jeronimus Pit are complete. Operations
<br />on-site include backfilling of the pit with fines from the Hazeltine Pit.
<br />Depletions covered by this SWSP are limited to water lost due to
<br />evaporation. The 14.7-acre area exposed at the Jeronimus Pit prior to
<br />1981 is tied to the location as shown on the exhibit dated January 31,
<br />2011 as provided in the 2011 SWSP. The credits for the pre-1981 area are
<br />tied to the location identified on that map and may not be re-allocated
<br />to other areas of ground water exposure within the gravel pit permit
<br />boundary.
<br />Exposed Ground Water Surface: 5.6 acres post-81, 14.7 acres pre-81
<br />Active Dewatering: No
<br />Hazeltine Pit
<br />(South Platte
<br />Mainstem)
<br />Status: Mining operations at the Hazeltine Pit have been completed and
<br />reclamation is in progress. The Hazeltine Pit was lined with a soil
<br />bentonite slurry wall, and was approved as having been lined to the
<br />design standard referenced in the August 1999 State Engineer Guidelines
<br />for Lining Criteria for Gravel Pits in a letter dated May 25, 2016. The
<br />construction of the slurry wall resulted in ground water mounding and
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