A consultant with Crandall Engineering of Moncton suggests the construction of two large stormwater retention ponds east of Lorne Street will be crucial for long-term flood prevention in downtown Sackville.
During a presentation to town council on Tuesday evening, Pierre Plourde said the large ponds will be needed to store water when there are heavy rains, especially during the high Fundy tides.
“As a storm hits and the tides are in, then the water needs to go somewhere,” Plourde said, adding that now it ends up flooding downtown streets during bad storms.
“What we want to do is control that water between the tide cycles, so when the tide starts to go out, the ponds can drain,” he said, “but in between, you need to be able to store it.”
Plourde acknowledged that the town does not have the money for the two large retention ponds that were included in an earlier plan drafted by Crandall as part of Phase Two of the Lorne Street flood control project. (For my report on the initial plan that included two large ponds and a third, smaller one, click here.)
In Phase One, of the project that was completed last year, construction companies reconstructed Lorne and St. James Streets installing bigger storm sewers and digging a large drainage ditch that was intended to tie into Phase Two which was supposed to cost $2.9 million.
However, the lowest bid for Phase Two came in at $5.9 million sending the town and its consultants back to the drawing boards.
On Tuesday, Plourde repeated what Town Engineer Dwayne Acton had reported to council last month.
He said that for now, Crandall and the town have been forced to scrap the original plan for the construction of the two large retention ponds along with pipes and ditches to drain water on a direct route through the Sackville Industrial Park to a double-gated aboiteau near one of the town’s sewage lagoons. Under that plan, the aboiteau would discharge stormwater into the Tantramar River as the tides recede.
Instead, Plourde said the new short-term plan includes the construction of just one large retention pond east of Lorne and south of St. James Streets.
That pond will store stormwater until it can be directed along a circular route through existing ditches to culverts under the CN tracks at Crescent Street and then, out to the river past the Armtec plant using provincially owned ditches and aboiteaux in the marshy areas along the way.
The new plan also includes a retention pond in the old Sackville Quarry to prevent stormwater from flooding into the downtown area.
“There’s way too much water that comes down from Quarry Lane and up above,” Plourde said. “You need to be able to store it.”
More money needed
Last month, a majority of councillors approved paying Crandall an additional $105,000 to design the new plan.
In the meantime, the town will apply for more money from the federal and provincial governments to carry out its original plan.
On Tuesday, Councillor Bill Evans said it might be hard getting more money because the storm sewers and ditches constructed during Phase One combined with the retention ponds that are part of the new plan will be able to handle rainwater during all but the most severe storms.
“It’s going to be harder to convince funders that we need this because we’re going to deal with all the regular flooding that we had before,” Evans added. “What we really are trying to do is prepare for the worst-case…scenario.”
Delay at Carters Brook
Meantime, Town Engineer Dwayne Action explained to councillors on Tuesday why work has stopped on the flood control project on Route 935 in the Carters Brook area of West Sackville.
The New Brunswick Department of Transportation and Infrastructure (DTI) had hired a construction company to install three, six-foot, concrete aboiteaux spaced 10 feet apart.
Acton said, however, that water was getting into the work site through the temporary service road that had been built to divert traffic. He said DTI will be meeting with the contractor who built the service road next week to discuss how to resolve the problem so that work can continue on installing the new aboiteaux.
“Our assurance from DTI is that it is getting rectified and they should be back on site to proceed with the project very soon,” Acton reported.