Catiline Creek Debris Flow Mitigation Service Project

Jul 17, 2023
Electoral Area C

Project Scope

To design, construct, and establish operation and maintenance of a debris flow mitigation structure for the Catiline Creek at Lillooet Lake Estates (LLE).

The objective of the project is to reduce the risk to the community and potential for loss of life by increasing capacity of the existing channel to manage future debris flows up to 100,000m3 through the community, under a new forest service road bridge, and into Lillooet Lake.

  • A preliminary design is in place which includes:
    • Approximately 900 metres of creek to be widened and deepened
    • Approximately 970 metres of training berms
    • Coordination of replacement FSR bridge with Ministry of Forests
  • A right of way is required through LLE as well as Crown land tenure.
  • The project involves tree removal and replanting and restoration, relocation of existing LLE-owned watermains and services and other incidental work.
  • The project will be constructed in 2 phases, with scope of each phase dependent upon funding.

Project Budget

The current approved project budget is:

Total Approved Project Budget*

$6 million

*The current approved project budget is based on available funds. The current cost estimate to complete the project based on preliminary design is $8.1 million, and is considered accurate to +/- 30%.


The current funding is:


$2 million

LLE site owners via
Loan Authorization Bylaw No. 1787-2022

Up to $4 million

Further funding is pending outcome of the SLRD’s application to the ICIP-GreenARDM Grant. If successful, will reduce the amount required through the Loan Authorization Bylaw above. Results of ICIP-GreenARDM application anticipated in Fall 2023. 

Project Timeline

The project is expected to take two to four years to complete.




Detailed design

Permit applications

Phase 1 construction

Phase 2 construction



Construction of a debris flow mitigation structure along Catiline Creek has been a priority for the community of Lillooet Lake Estates for several years, subsequent to major debris flow events occurring, most recently in 2010 and 2013. The SLRD has worked with the community for a number of years on items related to the debris flow hazard at Catiline Creek.

In September 2022 the property owners and the site owners / shareholders of Lillooet Lake Estates Ltd. petitioned the SLRD to establish a service and borrow up to $4 million for debris flow mitigation at Catiline Creek for both full and phased project options. The cost of service establishment and loan repayments are to be requisitioned via parcel tax to Lillooet Lake Estates property owners.

In December 2022 the SLRD Board adopted the Squamish-Lillooet Regional District Catiline Creek Debris Flow Mitigation Service Establishing Bylaw No. 1786-2022 and Squamish-Lillooet Regional District Catiline Creek Debris Flow Mitigation Service Loan Authorization Bylaw No. 1787-2022, and approved inclusion of service and project resources in the 2023-2027 Financial Plan. More information on this process can be found on the service establishment and loan authorization bylaw project page.

Community support for the project, and for the service establishment and loan authorization bylaws are critical elements of this project, including supporting applications for both provincial and national grant programs.

Project Updates

  • March 2023 - Capex Project Advisory Services Inc. engaged to provide project management services for project.
  • July 2023 - Kerr Wood Leidal Associates Ltd. contracted to provide engineering services for the project. 
  • September 2023 - Activities underway include engineering and environmental site investigations, detailed design, permitting, and engagement with First Nations and project stakeholders.

Status Updates 

Community Updates 

Other Staff Reports

Related Projects

SLRD Staff Contact Information

Phillipa Campbell
Project and Program Coordinator
Telephone: 604-894-6371  Ext. 234

Ali Chapple
Project Manager
Telephone: 604-894-6371  Ext. 265


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