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Feature ID: 790 <br /> Type of Feature: Shaft <br /> Excavated Dimension: 5ft by 8ft <br /> Eroded Dimension: 16ft by 16ft <br /> Construction Dimension: 16ft by 16ft <br /> Mine Dump Volume: 400cy <br /> Condition: Intact <br /> Lining: Rock <br /> Depth of Opening: 20ft <br /> Depth to Plug: N/A <br /> Depth to Bedrock: 20ft <br /> Shape of Opening: Circular <br /> Surface Material: Waste Rock <br /> Drainage Present: No <br /> Drainage Defined: N/A <br /> Access Deterrent: None <br /> Closure Method: Backfill, per SWS 2 <br /> Work Description: Backfill the feature using onsite material in accordance with SWS 2. Any <br /> trees removed shall be bucked into shorter lengths and scattered. <br /> Feature ID: 823 <br /> Type of Feature: Shaft <br /> Excavated Dimension: 8ft by 4ft <br /> Eroded Dimension: 8ft by 2ft <br /> Construction Dimension: 8ft by 4ft <br /> Mine Dump Volume: 500cy <br /> Condition: Partially Collapsed <br /> Lining: Rock & Timber <br /> Depth of Opening: 80ft <br /> Depth to Plug: N/A <br /> Depth to Bedrock: 15ft <br /> Shape of Opening: Irregular <br /> Surface Material: Waste Rock <br /> Drainage Present: No <br /> Drainage Defined: N/A <br /> Access Deterrent: None <br /> Closure Method: Polyurethane Foam, per SWS 9 <br /> Work Description: Install a polyurethane foam (PUF) closure in accordance with SWS 9. Set <br /> bottom form at nine (9) feet below ground surface. Install five (5) feet of PUF and backfill the <br /> remaining four (4) feet with onsite dump material. Backfill shall be graded to ensure positive <br /> drainage away from the closure. PROJECT MANAGER shall determine location of fill material <br /> to be used in the field. Equipment and debris must be removed from the shaft prior to installing <br /> closure. Six (6) cubic yards of PUF is required for this closure. <br /> Rev. 07/07/2023 <br /> Page 15 of 20 <br />