NORTH MAINS MMU 004, 74 BLOCK, 5 ENTRY, 4-WAY INTERSECTION. 20 FT WIDE X 20 FT LONG X 10 FT HIGH. SUPPORT: 6 FT 3/4 INCH RESIN BOLTS, ROOF MATS, WIRE SCREEN, CCABLE TRUSS BOLTS. FALL DANGERED OFF, ADDITIONAL ROOF SUPPORT INSTALLED AROUND FALL. CLEAN UP PLAN DEVELOPED AND POSTED.