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Lower Mainland Flood Management Strategy

Phase 1 Results & Next Steps


Phase 1 of the Lower Mainland Flood Management Strategy (2014-2016) is now complete.

Work of the past two years under this collaborative initiative has included an analysis of Lower Mainland flood scenarios, a regional assessment of flood vulnerabilities, and a review of current flood protection works and practices. Phase 2 is set to begin and will focus on developing a regional flood action plan by 2018, including a cost-sharing proposal for flood protection.

Phase 1 work shows there’s a growing risk of a large-magnitude flood in BC's Lower Mainland, and that if a major Fraser River or coastal flood were to occur between now and 2100, it would trigger losses estimated at $20 to 30 billion.

Lower Mainland flood risks are projected to worsen over the next 85 years, both in terms of flood frequency and size, because of sea level rise and other projected impacts of climate change. The Province of BC has committed $1 million towards Phase 2 development of the flood action plan.

Phase 1 Materials

The Phase 1 summary materials and full reports are available below.

Media Release & Backgrounder

Media Release: Lower Mainland Flood Action Plan Ahead (May 30, 2016)

Media Backgrounder: Lower Mainland Flood Management Strategy: Phase 1 Results and Next Steps (May 30, 2016)

See also Province of BC media release: Province invests $1 million in development of Lower Mainland flood action plan (May 30, 2016)

Phase 1 Summary Report

Lower Mainland Flood Management Strategy: Phase 1 Summary Report (May, 2016)

Phase 1 Full Reports

Project 1 Reports

Simulating the Effects of Sea Level Rise and Climate Change on Fraser River Flood Scenarios

Analysis of Flood Scenarios

Project 2 Report

Regional Assessment of Flood Vulnerability (Final Report with Appendices) (April 25, 2016) (Note: Large file: 56 MB)

Project 3

Lower Mainland Dike Assessment

Phase 1 Maps for Coastal Flood Scenarios (A and B) and Fraser River Flood Scenarios (C and D)

For information on the flood scenarios and information reflected in these maps, please see the Phase 1 Summary report and the full report Regional Assessment of Flood Vulnerability.

Coastal Flood Scenarios (A & B) Overview Map
(showing flood extents):

Fraser River Flood Scenarios (C & D) Overview Map
(showing flood extents):

Subregional Maps
(Sample maps showing flood extents and essential facilities in the floodplain)



In 2014 work was underway to develop a Lower  Mainland Flood Management Strategy to better protect  communities along the lower Fraser River and coast – from  Hope to Richmond and from Squamish to White Rock.

Partners in this inter-jurisdictional initiative have responsibilities or interests that relate to flood management: the Government of Canada, the Province of British Columbia, 26 local governments, and other entities in the region, including those focused on transportation systems, agriculture and business.

There are two phases to the strategy development:

  • Phase 1 (2014-2015) has involved a review of flood scenarios that threaten the Lower Mainland as well as a regional analysis of flood vulnerabilities, protective works, policies and practices.
  • Phase 2 (2016-2018) will focus on developing the Regional Flood Management Strategy and options for funding and implementation.

Phase 3 (2018-) will focus on implementation of the Strategy.

There is growing understanding that federal, provincial, local and First Nations government agencies and other public and private sector organizations must come together to coordinate flood mitigation efforts on a regional basis. The costs of responding to a major flood event far outweigh the costs associated with effective, proactive planning and investments across the region.

The Fraser Basin Council is program manager and facilitator of the process.

Learn More

flood_lmfls_cover_175px.pngFor more on the Lower Mainland Flood Management Strategy, see our backgrounder.

Questions? Contact Steve Litke, Senior Program Manager, Watersheds and Water Resources.


Our Vision

Social well-being supported by a vibrant economy and sustained by a healthy environment.

About the Fraser Basin Council

The Fraser Basin Council (FBC) is a charitable non-profit organization that brings people together to advance sustainability in the Fraser River Basin and throughout BC. Established in 1997, FBC is a collaboration of four orders of government (federal, provincial, local and First Nations) along with those from the private sector and civil society. We work with people in multiple sectors, helping them find collaborative solutions to today’s issues through a commitment to the social, economic and environmental dimensions of sustainability. Our focus is on healthy water and watersheds, action on climate change and air quality and strong, resilient communities and regions.

FBC Project and
Partner Sites

E3 Fleet/Green Fleets BC:

Plug in BC:

BuySmart Network:

BC Rural Network:

Rethinking our Water Ways:

ReTooling for Climate Change:

Climate Action Toolkit:

Contact Us

FBC has offices in Vancouver, Kamloops, Williams Lake, Quesnel and Prince George. We also have staff located in Abbotsford and Vernon.

To reach us, see FBC Offices and FBC Staff.

Our main office is:

Fraser Basin Council
1st Floor, 470 Granville Street
Vancouver, BC V6C 1V5

T: 604 488-5350
F: 604 488-5351