Flood Protection Structures in B.C.

Information about British Columbia's flood protection infrastructure is provided in this section. These important resources support the provincial Inspector of Dike’s regulatory responsibilities, including flood emergency planning, broad-based floodplain management and other related activities.

Flood Protection Works Database

The B.C. Flood Protection Works Database provides a comprehensive list of flood protection structures in the province. Each factsheet indicates:

  • The structure type (dike or other)
  • The structure length
  • Whether the structure is regulated under the Dike Maintenance Act
  • Contact information for the structure

Search for a flood protection structure by the river it is adjacent to or by the local responsible authority (updated July 2022):

Dike Inventory

The Lower Mainland dike inventory series of map sheets show flood protection works regulated under the Dike Maintenance Act.

As-Built Drawings

Access as-built drawings, studies, and significant reports for dikes operated and maintained in the Lower Mainland.

Orphan Dikes

There are over 100 flood protection works in B.C. which are not actively maintained by a diking authority. Many of these works were constructed under emergency conditions without engineering and do not meet the provincial standards for dikes.   Although many of these dikes are located on private property, some are still regulated, meaning they cannot be modified or disturbed in any manner without prior approval under the Dike Maintenance Act.   

The Province of BC provided funding to the Fraser Basin Council (FBC) to coordinate and manage a risk assessment for the orphan dikes. FBC provided the results of this work in Spring 2021 to corresponding local governments where the orphan dikes are located to provide up to date information on the current condition of the structures and to assist local governments in updating local emergency plans to address risks associated with these works. A link to the FBC summary report is provided below.

- Risk Assessment of BC's Orphan Dikes - Summary Report, 2020 (PDF, 24 MB)