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New Tecumseth’s Drainage Master Plan identifies 28 risk areas

May 4, 2023   ·   0 Comments

By Brian Lockhart

The Drainage Master Plan for New Tecumseth has identified risk areas where flooding can be a problem and has recommended projects to address those areas.

Council received an update on the study on April 24 from Matrix Solutions Inc. – the engineering firm that was hired to do the study.

On June 23, 2017, the region experienrced a significant heavy rain event that caused flooding throughout the town, specifically in the community of Beeton. The storm was categorized by the Nottawasaga Valley Conservation Authority as a 100-year storm event.

Much of the study area is within the Nottawasaga River watershed under the jurisdiction of the Nottawasaga Valley Conservation Authority. A small portion of the southeast corner of the study area is within the Holland River watershed under the jurisdiction of the Lake Simcoe Region Conservation Authority.

The major rivers within the study area include the Nottawasaga River, Boyne River, Bailey Creek, Beeton Creek, Penville Creek, Innisfil Creek, Sheldon Creek, and Holland River.

In Phase 1 of the plan, flood risk areas were identified. Flood risk areas include Sir Frederick Banting Road, Industrial Parkway and Canadian Pacific Railway, 14th Line at Sideroad 20, 10th Line and Tottenham Road, downstream of Beeton at 10th Line at Sideroad 10, downstream of Beeton at 9th Line at Sideroad 10, downstream of Tottenham 7th Line a CPR and South Simcoe Railway, and 5th Line at Sideroad 20.

Integrate urban drainage models, including a one-dimensional storm sewer network model and ponds, coupled with a two-dimensional surface model, were developed for the settlement areas.

Five models were developed to represent the communities within the town. The models were validated for the June 23, 2017, storm and then simulated for the two 100-year storms using a four-hour Chicago storm distribution for existing conditions.

Ten flood risk areas were identified for further investigation and assessment of mitigation options.

A vulnerability assessment was completed to assist the town and its residents in preparing for and responding to flooding.

This study recommends 28 proposed projects spanning the riverine and urban flood risk areas.

As it is not feasible for the town to undertake this many projects at one time, it will take many years to complete.

The town’s engineering department said funds are being directed annually to pay for the projects.

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