Multiple contractors attempting to clean the manholes and underfloor drainage system of the Sault Ste. Marie (Mich.) Poe Lock in early 2013 were thwarted by ice clogging hoses and vacuum lines. The work, scheduled from Jan. 15 through March 25 when the locks are closed for maintenance, was never completed.In late 2013, the U.S. Army Corps of Engineers put the project out to bid again. “We contracted to clean 14 48-inch manholes and 1,700 feet of 12-inch pipe,” says General Manager John Fukey of Tunnel Vision Pipeline Services in Escanaba, Mich. “That’s normally a one-day job.”However, the 2013-2014 winter at
