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Guildwood Parkway Erosion Control Project - Phase II

The Toronto and Region Conservation Authority (TRCA) has completed remedial erosion control works along a portion of the Lake Ontario shoreline known as the Guildwood Parkway sector, located at the base of the Scarborough Bluffs in the City of Toronto.

The Project

The Toronto and Region Conservation Authority (TRCA) has completed remedial erosion control works along a portion of the Lake Ontario shoreline known as the Guildwood Parkway sector, located at the base of the Scarborough Bluffs in the City of Toronto. Phase I of the Guildwood Parkway Erosion Control Project was initiated in 1987 to protect properties at the top of the Scarborough Bluffs from erosion caused primarily by wave action from Lake Ontario. A revetment was selected as the preferred measure, and was to extend from the end of the Guild Inn access road to 481 Guildwood Parkway at Morningside Avenue, however unresolved property issues resulted in the revetment being re-designed to terminate below 467 Guildwood Parkway leaving nine properties to the east unprotected. Phase II of the project was initiated in 2004 to complete the shoreline protection for the remaining properties along the Guildwood Parkway sector.

Project Objectives

Prior to the implementation of the shoreline stabilization works, the project site consisted of bluffs fronted by a narrow sand and gravel beach. The bluffs rising high above Lake Ontario are extremely steep shoreline features comprised of soft rock, clay, till and/or glacial sediment. These materials are highly susceptible to erosion, possessing a significant safety hazard as the potential for slope failure is high and the properties at the top of the bluffs are occupied with residential dwellings. The objective of the Guildwood Parkway Erosion Control Project-Phase II was to complete shoreline protection work for the remaining properties on the street, from 467-483 Guildwood Parkway and consequently provide long-term protection against erosion. The preferred measure of protection was selected through the Class Environmental Assessment (Class EA) process.

Planning Mechanism for the Undertaking

TRCA initiated the Class EA process for the Guildwood Parkway Erosion Control Project in January, 2004. Several meetings were held with the Community Liaison Committee to investigate a range of alternatives available for shoreline protection and to provide feedback on these options. The preferred option was determined to be a headland-beach system that minimizes the impact on the natural environment and preserves the current passive use of this section of shoreline.

Public and Agency Consultation

TRCA submitted the Environmental Study Report in support of the Guildwood Parkway Erosion Control Project for approval by the Ministry of the Environment under subsection 7(1) of the Environmental Assessment Act (EAA) in December 2004.

Upon the receipt of all other necessary permits and approvals, the work commenced in September 2008 and was completed in the spring of 2009.

Contact Information

For more information, please contact Moranne McDonnell, Senior Manager, Environmental Engineering Projects at 416-392-9725 or mmcdonnell@trca.on.ca.