2019-08-23_REVISION - M1980244 (5)

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Cripple Creek&Victor Gold Mining Company Squaw Gulch VLF Phase 2A Part 1 . Record of Construction Report 475.0106.032 August 21,2019 3.2.1. Coarse Shaft Backf ill Squaw Gulch VLF Phase 2 was constructed by placing 20,674 cy of coarse shaft backfill (CSB) during the remediation of the historic underground workings. Two CSB samples were tested with passing results; however, the Technical Specifications do not specify a testing frequency. CSB laboratory testing is summarized in Table 5 and individual test results are presented in Appendix 1.1. 3.2.2. Underdrain Fill The Squaw Gulch VLF Phase 2A Part 1 area was constructed by placing 1,234 cy of underdrain fill (UF).The particle size distribution and Atterberg limits testing frequencies were one sample for every 5,000 cy. One OF sample was required to be tested for particle size and Atterberg limits. Five OF samples were tested with passing results. OF laboratory testing is summarized in Table 6 and individual test results are presented in Appendix 1.2. 3.2.3. Select Structural Fill The Squaw Gulch VLF Phase 2A Part 1 area was constructed by placing 18,947 cy of select structural fill (SSF). The particle size distribution and Atterberg limits testing frequencies were one sample for every 50,000 cy. One SSF sample was required to be tested for particle size distribution and Atterberg limits testing.Seven SSF samples were tested with passing results. SSF laboratory testing is summarized in Table 7 and individual test results are presented in Appendix 1.3. 3.2.4. Structural Fill Squaw Gulch VLF Phase 2A was constructed by placing 1,476,127 cy of structural fill (SF). The particle size distribution and Atterberg limits testing frequencies were one sample for every 50,000 cy. A minimum of 30 SF samples were required to be tested for particle size and Atterberg limits based on the quantity of material placed. A total of 31 SF samples were tested with passing results. SF laboratory testing is summarized in Table 8 and individual test results are presented in Appendix 1.4. No laboratory compaction testing was performed on the SF placed within the Squaw Gulch VLF Phase 2 area, as all SF material contained more than 30 percent retained on the %-inch sieve. Density was achieved by placing the material in accordance with the method compaction specifications presented in Appendix E. 3.2.5. Leak Detection Fill The Squaw Gulch VLF Phase 2A Part 1 area was constructed by placing 111 cy of leak detection fill (LDF). The particle size distribution and Atterberg limits testing frequencies P:\Projects\0106.032 VLF2 Phase 2 CQA\1-REPORTS\Cert Report-Phase 2A Part 1\DRMS Comments\475.0106.032 CCV PHASE 2A Part 1 ROC REPORT_Revl.docx Page 11