Optimization of breakwater reconstruction at Mont Louis, Québec

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Proceedings titleProceedings, Annual Conference - Canadian Society for Civil Engineering
ConferenceAnnual Conference of the Canadian Society for Civil Engineering 2013: Know-How - Savoir-Faire, May 29-June 1 2013, Monteal, QC, Canada
AbstractThe Port of Mont Louis is located on the south shore of the Gulf of St. Lawrence, roughly 120 km west of Gaspé, Québec. A 450 m long breakwater was constructed on the east side of the bay in 1955 to form a sheltered harbour basin and to serve as a commercial wharf. Since this time, the structure has been exposed to numerous severe storms that have caused considerable damage, and today this important infrastructure asset is in urgent need of repair. In December 2006 the National Research Council of Canada (NRC) was commissioned by Public Works and Government Services Canada (PWGSC) to conduct numerical and physical model studies to guide the design of repair works for the wharf and surrounding breakwater. The proposed repair works were rather complex and nonconventional, as they involved constructing a new rubble-mound breakwater on top of the badly damaged structure. They also involved integrating a dynamically re-shaping (berm-style) armour layer design in some areas together with more conventional statically stable designs in others. Desktop and numerical modeling was performed to help define the nearshore wave conditions used as inputs for the physical modeling. A three-dimensional physical model was subsequently constructed and used to investigate the performance of the proposed repairs under a range of site-specific design conditions, including extreme water levels and harsh wave conditions. This paper summarizes the numerical and physical modelling studies and their important role in optimizing and verifying the breakwater reconstruction proposed for Mont Louis. The physical modelling allowed the proposed designs to be optimized to improve their hydraulic performance (stability), enhance their constructability, and reduce costs where possible.
Publication date
PublisherCanadian Society for Civil Engineering
AffiliationNational Research Council Canada; Ocean, Coastal and River Engineering
Peer reviewedYes
NPARC number23000581
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Record identifierccf69208-6364-4066-93ab-ea2b7cbd4d98
Record created2016-08-03
Record modified2016-08-03
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