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2018-2019 Results of the Thompson Watershed Risk Assessment

Project Deliverables Now Available

Here are the final 2018-2019 deliverables for the Thompson Watershed Risk Assessment, as completed March 31, 2019 by BGC Engineering, with project coordination by the Fraser Basin Council.

Thompson River Watershed Geohazard Risk Prioritization Report.

twra_final_report_cover_100px.pngThis report summarizes the methodology and results of the risk identification and prioritization, with details in the appendices.

Read the report (PDF: 16 MB).




Interactive Geohazards Map of the Thompson Watershed


This online map is the best way to view and interact with the results of the assessment. The map features layers on political boundaries, hydrology, hazard areas (by hazard type, hazard rating, priority rating and consequence rating), other hazards in the watershed, elements at risk, flood infrastructure, transportation routes & lifelines, and environmental values. Appendix H provides a guide to the online map.

How to Apply for Map Access

BGC Engineering hosts on the online map. The map will be available to access for employees of local governments, First Nations or tribal councils in the region and by the employees of federal departments or agencies until at least 2020.

To gain access for the first time, apply at Cambio Communities. Enter your name and email address to submit an access request to BGC Engineering, which will follow up with a link and temporary password.

Geodatabase with Prioritized Geohazard Areas

This database is available to download. Download the database (Zipped GDB: 13 MB).

Excel Spreadsheet with Summary Statistics

Appendix J of the report is an Excel spreadsheet with summary statistics of results and attributes of prioritized geohazard areas. Download the spreadsheet  (XLSX: 2MB).

Key Project Results

BGC Engineering Inc. (BGC) carried out a clear-water flood, steep creek (debris flood and debris flow), and landslide-dam flood risk prioritization of the Thompson Watershed, with the support of Kerr Wood Leidal Associates (KWL), with funding provided by Emergency Management BC (EMBC) and Public Safety Canada under Stream 1 of the Natural Disaster Mitigation Program (NDMP, 2018).

BGC Engineering characterized and prioritized the flood, steep creek and landslide hazards in the watershed that might impact developed properties. The goal was to support decisions that prevent or reduce injury or loss of life, environmental damage, and economic loss due to geohazard events.

In the assessment, BGC Engineering identified and prioritized 6225 geohazard areas encompassing over 4,000 km 2 (7%) of the watershed. About 30% of the watershed’s population, 50% of assessed building values, 30% of business locations, and most of the major transportation routes are within or cross these geohazard areas.


The risk assessment provides the following information for the Thompson River Watershed:

  • Identification and prioritization of flood and steep creek geohazard areas based on the principles of risk assessment (based on a consideration of both hazards and consequences)
  • An online interactive map to view prioritized geohazard areas and supporting information
  • An evaluation of the relative sensitivity of geohazard areas to climate change
  • Gap identification and recommendations for further work.

Risk Management Support for Communities

The report and maps are intended to inform future planning and development, emergency response during flood and debris flow, and guide future work to fill in gaps in information.

Those with flood management responsibilities may draw on the information for one or more of the following:

  • Operate under existing flood-related policies and bylaws, but base decisions on improved geohazard information and information management tools
  • Review and potentially revise Official Community Plans (OCPs) and related policies, bylaws, and land use and emergency management plans
  • Undertake flood resiliency planning, that is, “to prepare and plan for, [resist], recover from, and more successfully adapt to adverse events” (NRC, 2012)
  • Develop a framework for geohazard risk management, including detailed hazard mapping, risk assessment, and mitigation planning
  • Prepare funding applications to undertake additional work related to geohazard risk management within the Thompson River Watershed.

Local and First Nations governments are welcome to share these deliverables with their planning and development staff, and their emergency response staff. The online map can be used to explore the areas of risk identified, and detailed geospatial files and spreadsheets for use by mapping staff.  See the detailed report for specific recommendations.

Next Steps

The Fraser Basin Council will continue to support project partners on the next steps. A funding application has been submitted to the National Disaster Mitigation Program for 2019/20 to generate topographical data collection by LiDAR of key areas where it does yet not exist.  The data would support detailed flood mapping in select areas in the future. In coordination with TNRD, CSRD, CRD and RDNO, FBC has also submitted funding applications to UBCM’s Community Emergency Preparedness Fund for screening-level hydraulic flood mapping in select areas in 2019/20.

Learn More

For further information, contact:

Mike Simpson
Senior Regional Manager
Thompson Region

T: 250-314-9660


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

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