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5) Conclusions <br />Portal and head wall stabilization was completed in accordance ctiv ties will continue with the best during <br />practices. Head scarp and bench maintenance and monitoring <br />operation. <br />6) Maintenance Activities include: <br />• Routinely survey topographic slope stability monuments <br />• Remove mill and debris; <br />• Maintain stormwater runoff control structures; and <br />• Annually report site observations; <br />Photos <br />Pre and Post Construction <br />• May Day No. 1 —Collapsed Portal Debris <br />• Portal Stabilization Features <br />• Location of Scarp Bench Stability Monitoring Points <br />6 <br />Figures <br />Figure 1 May Day No. 1 As -Built Topography <br />General Site Location (See Attachment 2) <br />Typical Adit Support Sections (Attachment 6) <br />Attachments <br />Attachment 1- Gonzales -Headwall -Collapse Assessment March 31, 2011 <br />Attachment 2 - Technical Revision Work plan- March 3.02.2012 <br />Attachment 3 - May Day No. 1 May Day No. 1 Work Plan <br />Attachment 4 - Geotechnical Design Components <br />Attachment 5 — Headwall Stabilization —Franklin Drilling & Blasting t tion and Study for <br />Attachment 6 - Implemented Study Stabilization Project Hesperus, Colorado <br />the Mayday Mine Headwall <br />Attachment 7 -Portal Steel Set Design-Melcher Construction Notes <br />Wildcat Mining Corporation <br />May Day and Idaho Mine and Mill Application <br />112(d) Permit — Technical Revision No. 1 <br />May Day and Idaho Mine <br />M-1981-185 <br />Revised June 30th, 2016 <br />