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Valve Problems Add To Scope Of Work At Lift Station, Lagoon

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Work is planned to repair a problem at the Dauphin sewage lagoon which was discovered during an upgrade of Lift Station no. 1 north of the city.

In late April, the contractor working at the lift station encountered a problem while trying to close the valve on the force main leading from the station to the lagoon.

The age of the valve, combined with the fact that it had not been exercised regularly, resulted in it becoming seized open.

A further examination of the system resulted in city staff finding three other valves with the same issue within the lagoon network.

“They discovered that when they tried to start to lower the levels of the main cell of the lagoon, some of the valves that control the flow from the main lagoon into the other lagoons weren’t necessarily operating the way they should,” director of Public Works and Operations Mike VanAlstyne said.

“They just sat open for so long. It was a maintenance item that was overlooked for years, probably since the lagoon’s been constructed.”

Remediation of the problem will involve hiring a diver to plug the force main at the lagoon which will allow the contractor to replace the three vales in the lagoon and city crews to replace the remaining valve at the lift station.

The contractor will supply all the materials necessary to complete the work. The cost of the work is expected to be $415,666 plus some internal costs for the city in wages and equipment.

The good news, VanAlstyne said, is Manitoba Water Services Board will pick up some of the cost.

“Since this is an extension of the ongoing work water services agreed to take half of the cost,” VanAlstyne said, adding the city will be responsible for $207,833 plus half of the costs incurred by city staff doing the work. The work is expected to be completed in mid-to-late October, at which time city crews will have the 2021 capital plan completed. The reason for the delays is related, in large part to the pandemic.

“The reason it’s taken this long is they’ve had a hard time locking in pricing for anything,” VanAlstyne said. “The cost of these valves has exponentially increased since last year is what my understanding is. Lead times have been unknown at times. That was part of the problem in April, one of the main suppliers, they were shut down with the pandemic. We were being told it could be anywhere from 10 to 16 weeks.”

At its regular meeting Aug. 9, city council approved the change order for the work and an amended agreement with Manitoba Water Services Board with the cost for the project to paid out of the Water and Sewer Reserves.