The Halton Region Conservation Authority, known as ‘Conservation Halton’, is a community

based environmental agency established under the Conservation Authorities Act. Conservation

Halton works to safeguard the public from natural hazards and protect, restore, and manage

natural resources within our jurisdiction through the delivery of services and programs that

operate in partnership with all levels of government, landowners, business, and environmental

organizations. Conservation Halton’s jurisdictional area spans approximately 1,000 km2 and

comprises 17 watersheds across multiple municipalities, including the Cities of Hamilton,

Burlington, and Mississauga, the Towns of Oakville, Milton, and Halton Hills, and the Township

of Puslinch, within the Regions of Halton and Peel, and Wellington County.

Conservation Halton is responsible for administering Ontario Regulation 162/06, which is a

Provincial regulation passed under the Conservation Authorities Act. This regulation is intended

to prevent loss of life and property damage as a result of naturally-occurring hazards, while

protecting sensitive natural areas. Under Ontario Regulation 162/06, Conservation Halton

regulates development within the riverine and coastal flooding and erosion hazards, hazardous

lands, and wetlands and their associated regulated allowances. To implement this regulation

most effectively, up-to-date mapping and modelling is critical. Conservation Halton is

undertaking updates to the models and mapping that define flood hazard (including mapping of

large or inter-basin spills). The updated models and mapping will inform the extent of

regulation, but may also be applied to support: flood mitigation works, flood forecasting and

warning, emergency planning and response, infrastructure design, etc. Therefore, models and

mapping must comply with Provincial guidelines for hazard delineation.

Project Overview

This Study will comprehensively update flood hazard models (hydrology and hydraulics) and

mapping for four urbanized watersheds (Tuck, Shoreacres, Appleby, and Sheldon Creeks), to

support land use planning and regulatory decision making. The mapping will identify both the

riverine floodplain and the flow pathways of any large or inter-basin spills. Mapping for large

spills will extend to their ultimate receiver, either downstream within the same watershed, Lake

Ontario or an adjacent regulated watercourse (Roseland, Tuck, Shoreacres, Appleby, Sheldon or

Bronte Creeks). 

*For further details, please refer to the RFP document.