And for more info on the overall site-plan vist (here)
“The pump station will have 11 pumps and will be able to drain an Olympic-size swimming pool’s worth of water in four seconds. During a storm, the station can push more than 19,000 cubic feet of water per second out of the drainage canals behind the barrier.”
From this NYT article about the new/updated 350-mile ring of levees, flood walls, gates and pumps to defend New Orleans against the effects of a severe storm and which will be completed by 2011.
An infographic depiciting this new ring of levees et al., is below.