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SUPPLEMENTAL INFORMATION REPORT 2001 PIKEVIEW QUARRY RECLAMATIONPROJECT ENVIRONMENTAL ASSESSMENT, DECISION NOTICE, AND FINDING OF NO SIGNIFICANT IMPACT Background The Pikeview Quarry is a large pit visible from I-25 and much of the northern Colorado Springs vicinity. Specifically,it is located approximately 5 miles northwest of Colorado Springs at the southern edge of the United States Air Force Academy(see Figure 1.1). The quarry was first mined in the early 1900s for limestone aggregate and mining continued under the current owner, Riverbend Industries Inc.(Castle Aggregates), for limestone aggregate from 1970 until operations ceased in 2008. Castle Aggregates currently has a Construction Material(112)Reclamation Permit with the State of Colorado, which covers an area of 240 permitted acres for reclamation purposes, including up to 26 acres on National Forest System (NFS) lands. The quarry produced limestone aggregate until 2008 when a landslide occurred within the quarry on private lands and shut down all mining-related operations. No mining—related operations have occurred since 2008. In 2001,the Forest Service approved a Special Use Permit for an enhanced reclamation project, which also included an approved operating plan and a contract for the sale of 200,000 yd3 of material from NFS lands bounding the Pikeview Quarry. The intent of the contract was to use the requested NFS material as part of the larger reclamation of the quarry on the adjacent private lands. The operator has not exploited material from the Pikeview Quarry since 2001 and 197,500 yd3 remain on the original contract for disposal. Proposed Action Castle Aggregates proposes to utilize the remaining volume of fill material (197,500 bank yd3)approved in 2001 from the South Placer claim zone(Figure 1.2)as backfill in the earthen buttress to the existing landslide on adjacent private land. The material is primarily placed as compacted fill in a bottom-up manner and fill from the upper portions of the quarry will be dozed into place before being covered with compacted fill. Following grading of the backfill slope,the site will be revegetated by placing on-site topsoil,seeding,and planting trees(see Reclamation Plan). The post-mining use of NFS lands will comply with the Forest Plan as wildlife habitat,and all areas of the quarry will be reclaimed. Previous NEPA The range of alternatives analyzed in the 2001 Pikeview Quarry Environmental Assessment(EA)are summarized on the following page.The criteria selected by the Forest Service for evaluation of alternatives were based primarily upon environmental and feasibility factors. In particular,alternatives with reduced environmental impacts and with a higher success of reclamation potential were favored. Other considerations included the potential for mitigating the visual impacts of the previously mined area and the measurable long-term benefits. In the 2001 Pikeview Quarry EA,the selected alternative allowed the applicant to expand the quarry to occupy up to 26 acres of NFS lands in order to lay back the top cut and implement enhanced reclamation. The proposed layback operation(also referred to as west reclamation)did not occur previously due to a series of landslides that shut down quarry operations in 2008 and again in 2012. Summary of Alternatives Pikeview Quarry SIR Pa ; e 1