As construction of new hospital moves ahead, MUN engineer raises flooding concerns

A Memorial University professor says the Newfoundland and Labrador government is taking a big risk by building a mental health and addictions facility in an area that has flooded repeatedly over the past few decades.

The location of the new mental health hospital, near the Health Sciences Centre in St. John's on a flood plain, has drawn criticism from many, including Joseph Daraio, a hydraulic engineer andMUN associate professor.

"It's not a really good idea to put any building in a flood plain," said Daraio in a recent interview. "Especially something that would include such a high risk to so many people in a flood plain."

The provincial government's ownpolicy prohibitsit from puttingan institutional buildingon a flood plain but the government also says the same policy permits it to buildhydraulic structures, such as berms, on one.

A map provided by the City of St. John's shows the new hospital is well withinan area that has flooded at least three times since the mid-1980s.

Provincial government defends decision

The provincial government'spolicy for flood plain management seems clear; itsays"institutionaldevelopments, such as hospitals"are "not permitted" to be constructed in a flood plain.

In a statement to CBC News, theEnvironment Department defended the decision, saying that the construction of a berm will mean the site will no longer be a flood plain.

"Under the policy, institutional buildings are not permitted to be constructed in flood plains. However, the policy allows hydraulic structures, including berms, within a flood plain. The proposed mental health facility will be outside the flood plain once the Health Sciences Centre berm is complete and will be in full compliance with the province's flood plain policy," says the statement.

The statement also notes that apublic environmental assessment process is required for such a structure, and one was donefor the Health Sciences Centre berm.

Building in the river

But Daraio still has concerns about the project.

"A flood plain is part of the river. It doesn't always have water in it but it is something that regularly has water in it. So in my view it's equivalent to building in the river," he said.

Daraiofearsthere will be an increased risk of flooding upstream and downstream.

"You'regoing to have a backup effect where you couldsee more flooding upstream of where they are doing the construction," he said.

"The bridgeis what controls the flow downstream and it's possible and I think likely that it would increase the risk of being overtopped, which could cause erosion or possibly failure of that bridge."

Daraio says well-designed projects can control water but there are well known examples of catastrophic failures, like the hurricane that flooded New Orleans.

"Think of Katrina, where you have an extreme event and the levy failed," he said. "The berms here are acting as levies, and if the flows get high,it's certainly a risk that this could fail."

Despite concerns raised by City of St. John's officials, construction is moving ahead and the new facility, replacing the Waterford, to open in late 2024.

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