Pumps ridding Bluff Swamp Basin of high water Pumps ridding Bluff Swamp Basin of high water River Parishes bureau Jan. 31, 2013 Comments PRAIRIEVILLE — Ascension Parish crews on Friday began pumping water from the Bluff Swamp Basin into Bayou Manchac. East Ascension Consolidated Gravity Drainage District No. 1 workers installed two floating pumps in Frog Bayou on Thursday to facilitate lowering water levels in the Bluff Swamp area, officials said in a news release Friday. Bluff Swamp is located in northwestern Ascension Parish, where water levels remain high following heavy rain that fell over the region during the past several weeks. Pumping operations started Friday morning and were expected to take approximately two weeks. Alligator Bayou Road, meanwhile, has been closed indefinitely. Officials said each of the two pumps, which use 42-inch pipes, is capable of pumping 68,000 gallons of water per minute. Without the use of the pumps, officials estimated the basin would take at least one month to drain back to normal levels.