The U.S. Department of Transportation’s Saint Lawrence Seaway
Development Corporation (SLSDC) today announced that Hands-Free Mooring (HFM)
technology is fully deployed throughout the Saint Lawrence Seaway. The new technology
revolutionizes the method for locking vessels through the Seaway and is the most important
technological advance since the Seaway’s opening in 1959.
“This new technology is a significant modernization of the St. Lawrence Seaway’s infrastructure,
and will enhance workplace safety, lower operating costs for carriers, and decrease vessel transit
times through the locks,” said U.S. Transportation Secretary Elaine L. Chao.
The SLSDC invested $23 million to install HFM technology in the U.S. Snell Lock and the U.S.
Eisenhower Lock. The Seaway’s HFM project is the first use of this technology for an inland
waterway, and the SLSDC has prepared its workforce with the skills necessary to implement the
“The Saint Lawrence Seaway Development Corporation has a long history of implementing
technological innovations to improve the safety and efficiency of its operations,” said SLSDC
Deputy Administrator Craig H. Middlebrook. “Hands-Free Mooring will dramatically improve
the vessel transit experience through the Seaway by enhancing safety and achieving greater
efficiencies in freight movement.”
The HFM system uses vacuum pads, each of which provides up to 20 tons of holding force. The
vacuum pads are mounted on vertical rails inside the lock chamber wall to secure the ship during
the lockage process as it is raised or lowered while keeping it a fixed distance from the lock wall.
The last step in the lockage operation consists of releasing the vacuum and retracting the pads so
that the vessel can sail safely out of the lock.
The full implementation of this new technology is important to the Seaway. Last year, there was
a 7 percent increase in vessels transiting the St. Lawrence Seaway, moving 41 million tons of
cargo through the binational waterway. The increase in shipping in the St. Lawrence Seaway is
the highest cargo total since 2007.