(Click here if drawing doesn't appear above.) 1 Mechanical & electrical room. 2 Equipment pad. 3 Earth cover. 4 Stairway. 5 Winch. 6 Crane rail above. 7 Limits of crane hook travel. 8 Warhead handling room. 9 5 ton bridge crane. A Concrete pad for air cooled condenser. B Toe of earth cover. C Concrete stoop. D Concrete canopy above. E Pipe guard. F Environmental closure (shown retracted). G Dock bumper. H Concrete jack pads. I Retaining wall. J Emergency exit tunnel. K Ramp down. L Corrugated steel pipe. M Tunnel soffit line.