Where has the river gone?
By Manfred Jager
Winnipeg Free Press
Wednesday, October 14, 1998

Jean-Pierre Brunet used to spend a lot of time sitting on the riverbank watching the river flow.Now he spends a lot of time wondering where the river has gone.

Brunet, president of the Save Our Seine River Environment Inc., said the tail end of the Seine has slowed to a trickle because of a bad leak at the Red River Floodway.

When the floodway was built in the 1960s, a special culvert was constructed to carry the Seine-which starts south of Steinbach and flows through Lorette-under the huge earthen dike and into Winnipeg.

Now the Seine bubbles up from the culvert into the floodway.

The Seine's levels in the city are way down, with the only water now entering the Seine coming from storm sewer runoff in South St. Vital, Brunet said.

"As environmentalists, we are very concerned about the water supply to the Seine," Brunet said. "We've been in touch with the Department of Natural Resources, but we're not getting very much co-operation from them."

Steve Topping, director of the water resources branch in the Natural Resources Department, said his engineers have been aware of the Seine siphon leak for years and monitor it annually.

This year's inspection has not yet taken place, Topping said. It's scheduled for later this month.

The Seine culvert is designed to channel up to 150 cubic feet of water per second under the floodway and into the city. If more than that rushes through, the upper lip of the culvert siphons the surplus off and spills it into the floodway, as it did during the flood of the century 15 months ago.

Right now, there's plenty of river water, about 10 cubic feet per second, but nothing coming out the other end.

Harold Thwaites, the group's vice-president, said turtles, frogs, muskrats and beaver could die if there isn't enough water.

"The flow is zero," Thwaites said. "It all bubbles up into the floodway."

Thwaites said the province's resources branch has known about the leak in the culvert/siphon structure since 1990. The spill rate at that time was estimated at about 0.7 cfs.

"I guess we're looking at a leak that's 10 times worse than it was in 1990," Thwaites said.

Thwaites said the big leak could mean a giant soil washout somewhere beneath he floodway, not unlike sink-holes under roads."Whether or not that's dangerous I'm not sure," Thwaites said. "Whether it's annoying, yes; very much so."

"My engineers have been watching that for a number of years and it's not dangerous. It has been very minor since we first learned about it," he said. "Since the '97 flood, we have noted the leak is a little higher, but not as high as purported here. We do have a difference of opinion there."

Topping said the water resources branch is "looking at the entire floodway infrastructure for rehabilitation and improvement."The system is 30 years old now we need to go through the whole system and see what needs to be done here.

"In some sections this could mean total refurbishment, Topping said.

"The Seine River siphon is one of the structures we're looking at," he said




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