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0 0 <br />Feature # Closure Method Cost <br />315 <br />Concrete panels (2 panels) <br />$1,080 <br />352 <br />Polyurethane foam (10 cubic yards) <br />3,304 <br />with access <br />353 <br />Concrete panels with locking grate <br />1,925 <br />(3 panels) <br />354 <br />Cable netting <br />4,200 <br />355 <br />Cable netting <br />3,600 <br />356 <br />Concrete panels with grate <br />1,925 <br />(3 panels) <br />358 <br />Backfill (40 cubic yards) <br />566 <br />360 <br />Concrete panels with grate <br />1,925 <br />(3 panels) <br />361 <br />Culvert and grate <br />2,750 <br />362 <br />Grated adit closure <br />775 <br />363 <br />Culvert and grate <br />1,500 <br />368 <br />Backfill (50 cubic yards) <br />650 <br />371 <br />Backfill (135 cubic yards) <br />2,957 <br />372 <br />Polyurethane foam (7 cubic yards) <br />1,015 <br />373 <br />Polyurethane foam (8 cubic yards) <br />1,160 <br />374 <br />Backfill (160 yards) <br />2,240 <br />375 <br />Polyurethane foam (13 yards) <br />1,840 <br />376 <br />Concrete panels (2 panels) <br />1,080 <br />377 <br />Adit door <br />1,800 <br />378 <br />Backfill (40 cubic yards) <br />560 <br />379 <br />Panels (3 panels) <br />2,067 <br />380 <br />Adit door <br />2,100 <br />381 Panels with grate (7 panels) <br />3818 Polyurethane foam (9 cubic yards) 2,295 <br />with ventilation <br />