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Lift station upgrades being eyed

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The town will be looking at upgrading its White Pine lift station next year.

Based on studies done in the past two years, the Operations and Facilities executive committee has recommended money be brought forward in the 2019 capital budget to complete detailed design of lift station upgrades including new pumps, wet well, and screen, according to a report from Operations and Facilities manager Travis Rob, which council approved at its regular meeting Monday night.

A lift station is a facility designed to move wastewater from a lower to a higher elevation.

The same report recommends wastewater treatment operators complete a drawdown test at the White Pine lift station to determine actual pump rates, and that the design for the Scott Street road reconstruction (Reid Avenue to Colonization Road East) be changed to reflect a larger pipe to handle any future development in the Shevlin wood yard.

The latter would entail upgrading the pipe from 300mm to 375m in diameter.

The committee also directed the town to work with known property owners in the catchment area to disconnect sump pumps and eavestrough connections from the sanitary sewer system next spring.

As well, the committee recommended the current manhole rehabilitation program continue to address manhole deficiencies throughout town, particularly those in this area.

Repairing or replacing defective manholes reduces the amount of infiltration into the sanitary sewer.

Back in 2017, the town undertook a study of the Minnie Avenue sanitary catchment area, in concert with a development at the corner of Front Street and Minnie Avenue, to look into a potential capacity issue in this catchment area, Rob recalled.

The study found there were some hydraulic problems with the current infrastructure and some remedial work could be completed to improve the flows in that area.

That work was completed this year.

In addition, there was a recommendation to investigate the drainage shed to the north draining into Scott Street and the Scott Street sanitary main from Minnie Avenue to the White Pine lift station as this was identified as contributing to flow issues in 2014.

This past July, the town sent out requests for quotations to undertake this study and subsequently engaged KGS out of Winnipeg, which had completed an infiltration and inflow study for the town back in 2012.

“KGS took a look at all of the available reports on the town's sanitary system, as well as CCTV [closed-circuit TV] video inspection of the mains,” noted Rob.

“[They also] visited the site and completed inspections of all manholes and properties, speaking to as many property owners as available to determine areas of inflow to target,” he added.

“In addition, KGS utilized the model that they created during the I&I [inflow and infiltration] study to complete some theoretical investigations around a development at the Shevlin wood yard to determine impacts to downstream systems,” Rob said.

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