2025-04-14_HYDROLOGY - M2004044 - Laserfiche WebLink

Home Browse Search

Holcim South Platte Combined SWSP April 14, 2025 Plan IDs 3614, 4773, 3624, 4772, 4616, 3437, 3376, 3650, 3668, 5475, 5829, &t 6243 Page 26 of 37 lease agreement between the Applicant and the purchaser of the excess replacement credits if the additional plan is not owned by the Applicant. The Applicant cannot claim credit for the use of the excess replacement credits in any other plan until they have received written approval from the Division Engineer or Water Commissioner. Dewatering All sites that are actively dewatering have been equipped with a Totalizing Flow Meter ("TFM") to measure the dewatering discharge. Monthly dewatering volumes must be recorded monthly with the meter readings included on submitted accounting. As long as dewatering operations remain continual at constant rates the net accretions are assumed to offset any lagged depletions. Under this assumption, the Applicant is not claiming any dewatering credit. Once dewatering operations stop, or are significantly reduced, at specific sites the monthly meter readings will be used to analyze post pumping depletions. The sites that will be actively dewatered during this SWSP period are the Wattenberg Pit, W.W. Farms Pit, Tull Pit, DPG Pit, and Irwin-Thomas Pit. Long Term Depletions and Reclamation In accordance with the letter dated April 30, 2010 (copy attached) from the Colorado Division of Reclamation, Mining, and Safety ("DRMS"), all sand and gravel mining operators must comply with the requirements of the Colorado Reclamation Act and the Mineral Rules and Regulations for the protection of water resources. The April 30, 2010 letter from DRMS requires that you provide information to DRMS to demonstrate you can replace long term injurious stream depletions that result from mining related exposure of groundwater. The DRMS letter identifies four approaches to satisfy this requirement, which are identified and described in the attached letter. In accordance with approach no. 4, you have provided an affidavit dated February 29, 2012, that dedicates the 13.5 shares of the Whitney Ditch Company and 96 shares of the Fulton Irrigating Ditch Company described above as replacement water solely for this combined SWSP for as long as there are depletions at these gravel pit sites or until such time as another replacement source is obtained. This dedication supersedes a previous dedication dated January 25, 2011. A copy of the affidavit is attached to this letter. For the purposes of this SWSP, these affidavits will be accepted for the dedication of the shares; however, if the State Engineer determines that a different affidavit or dedication process is necessary to assure proper dedication of the shares, additional information may be required prior to future SWSP approvals. A summary of the final reclamation and the approach for compliance with the DRMS letter, including the current posted bond amount, is shown in Table G.