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SAFEGUARDING UNDERGROUND OPENINGS <br />Task description: Seal Portal and Vent Shafts <br />Site: Northfield Mine <br />PROJECT IDENTIFICATION <br />Task #: 055 <br />Date: 1/25/2012 <br />User: TR S <br />Permit Action: 2012 Bond <br />Recalculation <br />State: Colorado <br />County: Fremont <br />Agency or organization name: DRMS <br />UNIT COSTS <br />Penii t /Job #: C2006085 <br />Abbreviation: None <br />Filename: C085 -055 <br />Opening Description <br />Dimensions <br />Closure Method <br />Quantity <br />Unit <br />Unit <br />Cost <br />Total Cost <br />Portal - Block Wall <br />24'X7' <br />Adit closure - bulkhead <br />168.00 <br />SF <br />$97.24 <br />$16336.32 <br />seal, > °36sq. ft. (per sq. <br />ft.) <br />- Backfill Portal <br />24'X7'X25' <br />Adit closure - backfillina <br />156.00 <br />CY <br />$2.11 <br />$329.16 <br />(per cu. yd.) <br />Vent Shafts (2) - Steel <br />10' Diameter <br />Shaft closure - arate (per <br />2.00 <br />EA <br />$5,603.00 <br />$11,206.00 <br />Grate <br />opening) <br />- Concrete Cap <br />10' Diameter <br />Shaft closure - concrete <br />158.00 <br />SF <br />$138.29 <br />$21,849.82 <br />cap, poured-in-place (per <br />sq. ft.) <br />Job Hours: 120.00 <br />Total Cost: $49,721,30 <br />CIRCES Cost Estimating Software <br />