What locks beneath canal?
In here it smells like Ivar's restaurant a few days after the power went out. The walls feel like wet broken glass. Your feet splash in cold, ankle deep water and they crunch and squish on a carpet of muscles, barnacles and anemones. When it's empty the big lock is an 800 foot long concrete fish tank. It's slippery in spots but DO NOT grab at the wall to keep your balance.
"You won't know you're cut until you bleed," says Army Corps' Dru Butterfield, giving a safety talk before the tour.