The Maitland Valley Conservation Authority (MVCA), in partnership with the Ontario Ministry of Natural Resources, Township of North Huron and the Municipality of Morris-Turnberry, has completed an update to flood hazard mapping for portions of the North Maitland River in the Wingham area.

Flood hazard mapping for this area was previously updated in 2019. Since that time, the removal of the Howson Dam has altered water levels and floodplain conditions along the river. As the dam previously influenced water levels through this reach, its removal required an updated assessment to accurately reflect current conditions.

This work was completed through the federal Flood Hazard Identification and Mapping Program (FHIMP) using updated topographic data and hydraulic modelling.

The study area includes sections of the North Maitland River in the vicinity of the former Howson Dam, with mapping updates focused primarily on areas upstream within the Wingham community. As a result of this work, revisions have been made to the delineated flood hazard limits.  These changes have generally decreased the extent of the mapped floodplain.

Maitland Conservation hosted a Public Information Center (PIC), where landowners  had the opportunity to review the updated mapping and speak with staff. The floodplain mapping was approved by the Maitland Conservation Members (formerly the Board of Directors) at the Members’ Meeting on June 17, 2026.

You can view the updated mapping through this link:

Wingham  Floodplain Mapping Update

We recognize that the on-line mapping can be confusing if you’re unfamiliar with it. Don’t hesitate to contact us if you’d like help with it, or if you’d prefer a paper copy of the mapping showing your property. Please email Patrick Huber-Kidby at phuber-kidby@mvca.on.ca or call 519-335-3557 ext. 236.

Questions? Please contact:
Patrick Huber-Kidby
phuber-kidby@mvca.on.ca
519-335-3557 ext. 237