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Final Compensatory Mitigation and Monitoring Plan—Version 2.0 <br />Climax Mine Overburden Storage Facility Expansion (SPK-2013-00045) <br />March 2017 Bikis Water Consultants, a division of SGM Page 2 <br />Projects identified by Summit County. Summit County has identified several projects for <br />wetland restoration and creation. These projects were reviewed for participation by <br />Climax, but were determined not to be adequate due to their relatively small size and <br />other factors. <br />Permittee-responsible mitigation on Climax property. Climax has identified an area on <br />site that will provide adequate wetland mitigation. The area, known as Lake Irwin, is <br />located on the partially-reclaimed Robinson Tailing Storage Facility very close to <br />McNulty Gulch and in Summit County. This is a relatively large, flat area with a sufficient <br />water supply to create and sustain new wetlands. <br />Since CRCR and ILF credits are not available at this time, Climax intends to move forward with <br />permittee-responsible mitigation using the Lake Irwin site, and this Plan provides general design <br />details and other criteria for Corps approval. Depending on when and how many wetland credits <br />from CRCR or ILF become available, Climax may seek a permit modification to use these areas <br />for mitigation in the future. <br />This Plan was prepared based on the Section 404 permit application and associated materials <br />submitted for the project, including the “Compensatory Mitigation Proposal McNulty Gulch <br />Overburden Storage Facility (OSF) Expansion” (Bikis Water Consultants, a division of SGM, <br />BWC-SGM) February 2016), along with additional field work and investigations. This Plan is <br />consistent with the “2015 Regional Compensatory Mitigation and Monitoring Guidelines for the <br />South Pacific Division” (2015 Guidelines), and the Final Mitigation Rule (33 CFR Parts 325a and <br />332, and 40 CFR Part 230). <br />This Plan also describes the monitoring which will be conducted to assess the success of the <br />compensatory mitigation towards meeting its performance standards. In addition, a monitoring <br />plan is provided for fen wetlands in McNulty Gulch, which will not be impacted, to assure no <br />indirect impacts from the OSF expansion.