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Isolating the Trent Canal during Severe Flood Conditions
David Oram and Luc Beriault
Parks Canada Infrastructure Directorate, Public Services and Procurement Canada
The objective of this presentation is to demonstrate the approach that was used to reduce the risk under severe flood conditions as low as reasonably practical for a century old canal located within an urban environment.

The Trent-Severn Waterway (TSW) is an early 20th century navigational system which provides navigation from Lake Ontario to Georgian Bay. The Trent Canal portion of the TSW was built to by-pass the rapids of the Otonabee River within the city of Peterborough. Water levels in the Trent Canal and the water inflow in the Otonabee River is controlled by Nassau Dam, which is located immediately upstream of the City and about one kilometer from the Canal Entrance. Study has shown under certain conditions, the Trent Canal earth embankments could be over-topped by over 4 m.

Three protection measures were considered: 1) transform the erodible dams into non-erodible structures; 2) raise the earth embankments; and, 3) isolate the Trent Canal under large flood conditions.

A guard gate was eventually decided to provide protection of a flood conditions equivalent to a 1:2000-year return period in order to protect the residences in Peterborough.

Luc Beriault, Program Manager, Parks Canada Infrastructure Directorate, Public Services and Procurement Canada
Luc Beriault, P. Eng., holds a B.A.Sc. in Civil Engineering from the University of Ottawa and is a registered professional engineer in the province of Ontario since 1991. Luc joined the Parks Canada Infrastructure Directorate (PCI) of Public Services and Procurement Canada (PSPC) in 1999 and is the manager of the Heritage Canals design group.

Luc’s area of expertise includes the rehabilitation of marine assets such as dams and navigational locks. He also provides strategic technical advice to Parks Canada’s Ontario Waterways on such matters as funding requirements, condition assessments, and long-term capital plans.


Marine Sediment Sampling Programs – Sampling to Meet Program Requirements
James MacDonald, Joyce MacDonald, Janetta Fraser
AGAT Laboratories
The objective of this presentation is to assist stakeholders involved in sediment programs to optimize their sampling plans, improving data quality, meeting program objectives and reducing costs.

Within the current regulatory framework, the analytical requirements of sediment sampling programs are determined by current and future site use as well as proposed disposal of dredged sediments. With each project, there are a number of logistical considerations to be addressed to ensure the data generated meets the requirements of the sampling program/permit process. Factors such as site use, fate of dredged sediment, ease of access, timing constraints on the permit process must all be considered prior to commencing field activities. Key to the success of these programs is the analytical component – data must be accurate, meet the data quality objectives for the site and must be completed within required timeframes to ensure project and permit requirements are met.

By engaging the laboratory early in the process, the proponent increases the likelihood for successful completion of the project and minimizes the potential for unexpected gaps in data. Working with the laboratories will ensure both the proponent and the lab to define reporting limits, sample size, collection considerations, as well as other logistical issues that arise during any field event. This talk will address some of the sampling strategies that the laboratory can provide to ensure the marine sampling program is successful.

James MacDonald, M.Sc. Technical Services Manager, Atlantic Canada, AGAT Laboratories



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