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Holcim South Platte Combined SWSP September 18, 2025 <br /> Plan IDs 3614, 4773, 3624, 4772, 4616, 3437, 3376, 3650, 3668, 5475, 5829, &t 6243 Page 26 of <br /> 37 <br /> DPG Pit, and Irwin-Thomas Pit. <br /> The Wattenberg Pit's Struck Pond was dewatered to mostly empty in January 2025. The <br /> Applicant intends to line the Struck Pond in 2025. Replacement of lagged depletions shall <br /> continue until there is no longer an effect on stream flow. Water that was pumped to either <br /> the Ski Lake or Broda Pond did not cause lagged dewatering depletions due to the recharge <br /> accretions accruing to the stream in the same amount, location, and timing as the <br /> dewatering depletions. Water from the Struck Pond was pumped directly to the South Platte <br /> River, The Huett Seep, or discharged from the Broda Pond into the South Platte River does <br /> cause post pumping depletions, the timing of which were determined using the AWAS <br /> program with the aquifer parameters identified above. The lagged depletions are calculated <br /> to last for 42 months once dewatering has ceased. Actual monthly meter readings must be <br /> used to determine the actual dewatering rate and the resulting depletions under this SWSP. <br /> Dewatering water used for recharge must be metered separately from water delivered to <br /> the river. <br /> Long Term Depletions and Reclamation <br /> In accordance with the letter dated April 30, 2010 (copy attached) from the Colorado <br /> Division of Reclamation, Mining, and Safety ("DRMS"), all sand and gravel mining operators <br /> must comply with the requirements of the Colorado Reclamation Act and the Mineral Rules <br /> and Regulations for the protection of water resources. The April 30, 2010 letter from DRMS <br /> requires that you provide information to DRMS to demonstrate you can replace long term <br /> injurious stream depletions that result from mining related exposure of groundwater. The <br /> DRMS letter identifies four approaches to satisfy this requirement, which are identified and <br /> described in the attached letter. <br /> In accordance with approach no. 4, you have provided an affidavit dated February 29, 2012, <br /> that dedicates the 13.5 shares of the Whitney Ditch Company and 96 shares of the Fulton <br /> Irrigating Ditch Company described above as replacement water solely for this combined <br /> SWSP for as long as there are depletions at these gravel pit sites or until such time as <br /> another replacement source is obtained. This dedication supersedes a previous dedication <br /> dated January 25, 2011. A copy of the affidavit is attached to this letter. For the purposes of <br /> this SWSP, these affidavits will be accepted for the dedication of the shares; however, if the <br /> State Engineer determines that a different affidavit or dedication process is necessary to <br /> assure proper dedication of the shares, additional information may be required prior to <br /> future SWSP approvals. A summary of the final reclamation and the approach for <br /> compliance with the DRMS letter, including the current posted bond amount, is shown in <br /> Table G. <br /> Table G- Final Reclamation Summary <br />