Manual operation?
I'm intrigued by these sentences:
"The barrier's gates rely on a simple system of industrial plant with multiple levels of redundancy. In a nightmare scenario of lost power and computers, it is possible to operate the gates manually out on the barrier."
and
"One last thing to see: down and into a narrow side chamber housing a single piece of gear that looks like a piece of massive drill: an 11-foot screw shaft black with grease and with a series of levers at one end. .... In the event of a total hydraulic failure, operators could also use this to lift the gate from the water."
This suggests that the crew^H^H^H^Hstaff could manually turn the screw shaft, presumably with a giant capstan, to quell the flood. If so, just how many puny humans are needed to open or close each gate?
Biting the hand that feeds IT
