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$227 million lock replacement could start this year

By David Helwig
SooToday.com
Saturday, March 30, 2002

Preliminary construction work could begin later this year on a $227 million demolition and reconstruction project at the Soo Locks.

Stanley Jacek, area engineeer with the U.S. Army Corps of Engineers, told a meeting of the Sault Ste. Marie (Ontario) Transportation Committee on Thursday night that cofferdam construction on the Davis and Sabin locks could begin in 2002.

That would mean permanent closure later this year of the two locks, built in 1914 and 1919, Jacek told SooToday.com.

The two old locks will be demolished and replaced with one new lock capable of handling 1,000-foot vessels. To see a preliminary design for the new lock, click here.

A cofferdam -- a watertight enclosure from which water would be pumped to expose the river bottom -- is a necessary preliminary step, allowing demolition and construction to take place in a dry environment.

$3 million approved for preliminary work in 2002

The massive infrastructure project was originally approved by the U.S. Congress in 1986, but construction has been delayed by problems reaching a cost-sharing agreement with the Canadian Government and the half-dozen U.S. states expected to benefit from the project.

The Canadian Government has indicated it will not participate, Jacek said. User fees were initially considered but were prohibited under a U.S. statute passed in 1991.

However, the funding wrinkles are expected to be ironed out this year and $3 million has been allocated in 2002 for planning, design and construction preliminaries.

The cofferdam design work is scheduled for completion this year, and if sufficient funds remain, tenders will be called and construction could begin in 2002, Jacek said.

Channel dredging this summer

The U.S. Army Corps of Engineers has also received $3 million to dredge the approaches on the Upper (Vidal Shoals) and Lower (Little Rapids) St. Mary's River.

Thousand-foot vessels need 30 to 32 feet of water, but the current depth of the Davis and Sabin locks is 23 feet.

The dredging work started last year and is scheduled for completion in 2002, Jacek said. The exact alignment of the approaches is also being re-thought since September 11, he told the committee.

Why they want a new lock

The U.S. Government currently maintains four locks in the Sault. Here are the statistics:

MacARTHUR LOCK
BUILT: 1943
LENGTH: 800 feet
WIDTH: 80 feet
DEPTH: 31 feet

POE LOCK
BUILT: 1968
LENGTH: 1,200 feet
WIDTH: 110 feet
DEPTH: 32 feet

DAVIS LOCK
BUILT: 1914
LENGTH: 1,350 feet
WIDTH: 80 feet
DEPTH: 23.1 feet

SABIN LOCK
BUILT: 1919
LENGTH: 1350 feet
WIDTH: 80 feet
DEPTH: 23.1 feet

Davis and Sabin rarely used

Of the four U.S. locks, Davis and Sabin are the oldest and closest to Canada. Despite their 1,350-foot length, they're neither wide nor deep enough to accomodate thousand-footers.

As a result, Sabin has not been used at all in recent years and Davis is used only rarely. Seventy percent of the Soo's tonnage now goes through the much-larger Poe lock, Jacek said.

"If we have any problems, we have big trouble on the lakes," he told committee members.

Water levels

Asked by Mayor John Rowswell about low water levels, Jacek said that Lake Superior is currently five inches below its long-term average but nine inches higher than last year.

All Great Lakes are expected to rise during the next month, he said.

A report provided by Jacek to Rowswell indicated that the Lake Superior outflow into Lake Huron through the St. Mary's River is predicted to be about four percent below the long-term average for March.

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