Sixteen Mile Creek Valley Slope Assessment Erosion Hazard Limits in - - PDF document

Town of Oakville | Name of public meeting/open house etc.

Erosion Hazard Limits in Downtown Oakville Sixteen Mile Creek Valley Slope Assessment

Diana Friesen, B.Sc., CET Water Resources Technologist Town of Oakville 1225 Trafalgar Road Oakville, ON, L6H 0H3 905.845.6601 ext.3904 diana.friesen@oakville.ca Charles Priddle, PhD Manager, Regulations Program Conservation Halton 2596 Britannia Road West, Burlington, ON, L7P 0G3 905.336.1158 ext.2276 cpriddle@hrca.on.ca

Town of Oakville | Name of public meeting/open house etc.

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• Study area includes

Sixteen Mile Creek Valley and the lands along Navy Street, Randall Street and Dunn Street.

• The components of the

study included:

• Review of Background

Information, (previous mapping and reports).

• Site inspections and

detailed topographic survey.

• Geotechnical investigation

to assess subsurface soil/bedrock and groundwater conditions.

• Slope stability analysis to

determine stable slope.

• Fluvial geomorphological

study to estimate creek bank erosion over a 100- year plan horizon.

Town of Oakville | Sixteen Mile Creek Valley Slope Assessment

Slope Stability Study

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• Information from the study was used to confirm the

extent of the “top of stable slope” or “erosion hazard limit” which are used to define the “Regulated limits” at this location.

• For “major valley systems” such as Sixteen Mile

Creek, Conservation Halton (CH) regulates the erosion hazards, as well as an allowance of 15m from the limit of the hazard or stable top of bank.

• Detailed technical studies can be undertaken to

confirm CH’s regulated limit mapping.

Town of Oakville | Sixteen Mile Creek Valley Slope Assessment

Slope Stability Study

Town of Oakville | Name of public meeting/open house etc.

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Town of Oakville | Sixteen Mile Creek Valley Slope Assessment

CH Regulated Limits

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Town of Oakville | Sixteen Mile Creek Valley Slope Assessment

Ontario Regulation 162/06

• Section 28 (1) of the Conservation Authorities Act

allows conservation authorities to make regulations in areas that are within their jurisdiction to prohibit development in hazardous lands. CH’s regulation is Ontario Regulation 162/06. The purpose of the regulation is to protect life and property from natural hazards such as flooding and erosion.

• Under Ontario Regulation 162/06, CH regulates:
• all development in or adjacent to river or stream

valleys, wetlands, shorelines or hazardous lands;

• alterations to a river, creek, stream or

watercourse; and

• interference with wetlands.

Town of Oakville | Name of public meeting/open house etc. Town of Oakville | Sixteen Mile Creek Valley Slope Assessment

Ontario Regulation 162/06

• Permission is required from CH for undertaking any

works in or adjacent to watercourses, river or stream valleys, lands adjacent or close to the shoreline for Lake Ontario, other natural hazards such as karst, and wetlands and surrounding lands where development could interfere with the hydrologic function of a wetland.

• CH can issue a permit if the proposed works meet

CH’s Policies and Guidelines for the Administration

• f Ontario Regulation 162/06 (last revised February

2016).

• For more information on CH’s regulation and

policies, please visit CH’s website conservationhalton.ca