Wilmot & Graham Creek Floodplain Mapping

Wilmot Creek - Lake Ontario Shoreline

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Updated Floodplain Mapping

The Ganaraska Region Conservation Authority (GRCA) partnered with the Municipality of Clarington to update floodplain mapping for the Wilmot & Graham Creek watersheds.

Floodplain mapping helps to identify areas that may be at risk of flooding during severe storms and is an important tool for land use planning and emergency preparedness.

The study area covers the Wilmot & Graham Creek watersheds, which includes Newcastle Village, Orono, and the Hamlets of Brownsville, Leskard, Starkville, Clarke, and Newtonville. Residents can view the presentation video from the March 20th, 2023 meeting, as well as view the Mapping Interface of draft floodplain changes using the links below.

Project Timeline & Status

  • Spring & Summer 2021
    Background Data Review
  • Summer 2021 – Summer 2022
    Field Survey of Structures
  • Fall 2021 – Winter 2023 Winter 2023
    GIS Data & Model Development
  • Winter – Spring 2023
    Report & Map Production Public Information Centre
  • End of March 2023
    Project Completion