DIKES: GEOTECHNICAL SUPPORT

Flood protection dikes play an integral role in protecting many BC communities. BC has a high proportion of its population located close to major low lying areas and relies on flood protection dikes for safety. In addition, much of BC has a high seismic hazard due to its proximity to the Cascadia subduction zone. Dikes therefore need to be designed for static conditions, flood demands but also the impacts of earthquakes.

Ecora assists municipalities, owners, First Nations and other clients in the assessment and rehabilitation of dikes. Ecora utilizes the Seismic Design Guidelines for Dikes prepared by Ministry of Forests, Lands and Natural Resource Operations Flood Safety Section (June 2014) for seismic assessments and the Dike Design and Construction Guide Best Management Practices for British Columbia prepared by Ministry of Water, Land and Air Protection (July 2003). Our hydrotechnical team is integrated within the geotechnical team such that Ecora can provide a combined flooding and geotechnical assessment without the need for hiring separate consultants. We can provide the following:

• Physical condition assessments – flood damage, freeboard, vegetation, erosion, rip rap, structures and appurtenances
• Liquefaction analysis – based on the BC Provincial 2014 Seismic Guidelines for Dikes
• Seismically induced ground displacement estimates
• Stability, settlement and seepage analysis
• Climate change effects on dikes
• Rip rap armouring design
• Hydrotechnical analysis

CONTACT INFORMATION:

Michael J. Laws, P.Eng.

Michael.Laws@ecora.ca

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