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Page 49 of 80 <br />SAFEGUARDING UNDERGROUND OPENINGS <br /> <br />Task description: Seal Portal and Vent Shafts <br /> <br />Site: Northfield Mine Permit Action: 2014 Updated Costs Permit/Job#: C2006085 <br /> <br />PROJECT IDENTIFICATION <br /> <br />Task #: 055 State: Colorado Abbreviation: None <br />Date: 7/28/2014 County: Fremont Filename: C085-055 <br />User: JHB <br /> <br />Agency or organization name: DRMS <br /> <br />UNIT COSTS <br /> <br /> <br />Opening <br />Unit <br />Dimensions Closure Method Quantity Unit <br />Description <br />Cost Total Cost <br />Portal - Block Wall 24'X7' Adit closure - 168.00 SF $76.48 $12,848.64 <br />bulkhead seal, >= 36 <br />sq. ft. (per sq. ft.) <br /> - Backfill Portal 24'X7'X25' Adit closure - 156.00 CY $3.00 $468.00 <br />backfilling (per cu. <br />yd.) <br />Vent Shafts (2) - 10' Diameter Shaft closure - grate 2.00 EA $4,406.56 $8,813.12 <br />Steel Grate (per opening) <br /> - Concrete Cap 10' Diameter Shaft closure - 158.00 SF $108.77 $17,185.66 <br />concrete cap, poured- <br />in-place (per sq. ft.) <br /> <br />Job HoursTotal Cost <br />: 120.00: $39,315.42 <br /> <br /> <br /> <br /> <br />CIRCES Cost Estimating Software <br />