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® Stantec Memo To: Hunter Ridley From: Paul Kos CDRMS Cc: Jerald Schnabel, Castle Aggregates Project/File: Pikeview Quarry Reclamation Project Date: September 29, 2025 Reference: Technical Revision (TR-24), Pikeview Quarry, M-1977-211 Ms. Ridley, Castle Aggregates (Castle) has completed the process of reclaiming the Pikeview Quarry located northwest of Colorado Springs, Colorado. As part of the release request and recent communications with staff with City of Colorado Springs (City), Colorado Division of Reclamation, Mining, and Safety (DRMS), United States Forest Service (USFS), and construction and revegetation contractors, Castle is requesting the following Technical Revisions (TR): As all parties approach the final phases of reclamation, Castle respectfully requests DRMS approval of the following two minor deviations from the reclamation plan: • Infrastructure to remain to satisfy the City's request, and • Removal of shrub survival requirement from the permit. Following release of the Pikeview Quarry from DRMS, it is intended that the City will receive the property as a donation and further promote the post-mining land use of wildlife habitat and recreation. The City currently owns the eastern portion of the property. To support the post-mining land use, the City has initiated recreation construction on their portion of the property and has also requested that some of the infrastructure remain intact to facilitate their future uses of the property. The City has stated that they would like to accept these items as assets, rather than having them removed as contemplated by the current permit. A summary of the proposed infrastructure to remain, along with rationale for keeping it, is provided below. A letter from the City requesting the preservation of these items has been included in this TR as Attachment A. The attached Figure F-2 provides the locations of these facilities. • Leica building and prisms—The Leica system and associated prisms have been used at the Pikeview Quarry for site safety and stability monitoring. As recreation is a post-mining land use, safety of the public and potential users is still paramount. While geotechnical stability has been observed and achieved at the site, retaining this system will allow the City to continue monitoring throughout recreation construction. • Scalehouse—Throughout the duration of the reclamation phases, the City allowed Castle to utilize the scalehouse for their office operations. The original reclamation plan contemplated that both the scalehouse and scale would be demolished or removed, but the City has requested that the scalehouse remain so that the City can use it for the continued preservation and enhancement of the site. The scale will be removed as originally planned. • City parking lot and trails—To facilitate future recreation on the property, the City has commenced construction of a parking lot/trailhead and construction of multi-use trails within their property boundary. It is requested that this trailhead and trails be integrated into the final reclamation plan as permanent structures. • Driveway—The road (Pikeview Quarry Road) connecting Allegheny Drive to the site will be retained as part of the future open space and recreation access being created by the City.