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10/12 performing raptor surveys prior to commencing surface disturbances and implement best management practices in the event nests are observed. • Due to the presence of prairie dog colonies within the project site CPW recommends the adherence to CPW’s Burrowing Owl survey protocol if development occurs during the spring or summer months (Feb 1 to Oct 31). If nesting burrowing owls are present, no human encroachment or surface disturbance should occur within a 200-meter buffer of nesting burrows from March 15 to August 15. If burrowing owls occupy the site, CPW recommends that earthmoving and other disturbance activities be delayed until late fall after they have migrated. Response: Prairie dog colonies were not observed within RCQ but were observed west of a portion of MTAC on December 18, 2023. Holcim commits to performing burrowing owl surveys and implement best management practices in the event burrowing owl are observed. • This area includes several drainages with proximity to the Arkansas River to the north of the project location. CPW recommends utilization of best management practices and construction controls for sediment control. Avoiding any increased sedimentation in nearby drainages, including intermittent creeks would be important to avoid impacts to nearby aquatic habitat. Response: Holcim commits to implementation of best management practices and construction controls to control sedimentation of aquatic habitat in the drainages to Red Creek. 6.4.10 Exhibit J- Vegetation Information 30. Appendix Reference: The second paragraph of Section 2.10 references Appendix 4.10 as containing the vegetation survey report. Appendix 4.10 is the Integrated Weed Management Plan. Appendix 4.9 contains a Brown and Caldwell Technical Memorandum on the subject of Red Creek Quarry, Vegetation Information. If Appendix 4.9 is not the intended reference appendix, please clarify which appendix it should be. If Appendix 4.9 is correct, no response is necessary. Response: Appendix 4.9 is the Vegetation Survey. Appendix 4.10 is the Integrated Weed Management Plan. Narrative in Section 2.10 is revised. 6.4.12 Exhibit L- Reclamation Costs 31. Reclamation cost omissions: Due to long-term discussions as to whether the Plant is to be fully demolished as part of the site final reclamation plan, the bond for this site has not been fully updated since the approval of AM-1. With the recent approval of the acreage reduction request (AR-2) to remove all but the Scrubber on the south side of the plant and the Cement Mill Dust Collector on the north side of the plant from the affected area, the demolition aspect can be finalized as discussed during our November 2nd inspection. In order to fully flesh out a site-wide reclamation cost, the DRMS will need to know what reclamation Holcim deems is still required for the Bear Creek Quarry. Pursuant to Rule 6.4.12(1), please provide reclamation costs for the two aforementioned facilities at the Plant and for the remaining Bear Creek Quarry reclamation tasks, including the conveyors and other structures north of and crossing the Arkansas River. (Note, this will be dependent on your response to Comment No. 23 above).