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Sievers Pit M-77-098 SWSP, Oldcastle SW Group, Inc. Page 2 of 13 <br /> September 30, 2025 <br /> 1. Page 8: "The Applicant will obtain a new WDWCD lease for 6.0 acre-feet annually <br /> upon approval of this SWSP" was changed to "The Applicant has obtained a new <br /> WDWCD lease for 6.0 acre-feet annually." <br /> 2. Page 9, condition #6: Modified to specify that dewatering must be continuous to the <br /> extent that is necessary to prevent intermittent fill and be measured with a device or <br /> method acceptable to the Division Engineer. <br /> 3. Page 11, condition #15: Modified to "Any substituted water shall be of a quality and <br /> continuity to meet the requirements of use to which the senior appropriation <br /> receiving the substitute supply has normally been put." <br /> Your letter highlighted changes in several aspects of this renewal from what was contained <br /> in the previous SWSP, including: <br /> • Recharacterization of aggregate wash ponds as surface water for evaporation <br /> calculations (see attached Figure 1), and <br /> • Removal of the surface water pond located on the west side of the gravel pit from <br /> surface water evaporation calculations, as the pond is used for operations at the <br /> adjacent golf course community. Under the previous SWSP approval, the Applicant <br /> diverted surface water from the Crystal River via the Kaiser-Sievers Ditch for <br /> temporary storage in a 0.7-acre storage pond before the water was used in an <br /> aggregate wash plant at the site. The storage pond did not expose groundwater. This <br /> pond, now used for the Golf Course's operations, is no longer subject to this SWSP. <br /> In accordance with the letter dated April 30, 2010 (attached) from DRMS, all sand and gravel <br /> mining operators must comply with the requirements of the Colorado Reclamation Act and <br /> the Mineral Rules and Regulations for the protection of water resources. The April 30, 2010 <br /> letter from DRMS requires that you provide information to DRMS to demonstrate you can <br /> replace long-term injurious stream depletions that result from mining related exposure of <br /> groundwater. In accordance with approach no. 1, the Applicant has indicated that a bond <br /> has been obtained for $962,447 through DRMS to assure that depletions from groundwater <br />