Squamish River Dike at Jimmy Jimmy (Judd) Slough project will raise approximately 900 metres of the Squamish River dike on private land between Wai’wakum Reserve and Aik’wuck’s, widen the dike crest from four metres to six meters, provide rip-rap erosion protection for the raised portion of the dike, add a new vehicle turnout, and upgrade one access ramp.
The District of Squamish completed an Integrated Flood Hazard Management Plan (IFHMP) in 2017 which laid out a prioritized list of dike upgrades to raise the standard of flood protection for the community. The highest priority project was to upgrade the Squamish River dike at Upper Jimmy Jimmy (Judd) Slough to meet provincial requirements so that the dike can withstand a 1 in 200-year return period flood with 0.6 metres of freeboard.
This upgrade was completed in 2019.
The IFHMP also recommended a longer-term priority to raise the local standard of protection for the Squamish River dike beyond provincial standards, to meet a 1 in 500-year return period flood (see Figure 1 below for details). This increase of standard was recommended in recognition of the substantial community development that relies on the protection of the Squamish River dike. In anticipation of this future upgrade, the 2019 upgrade widened the footprint of the dike so that future upgrades would only need to raise the dike without requiring any additional space.
The proposed scope of work will:
2023/2024 Detailed design and permitting
Fall 2024 Begin construction
The District has applied for a grant of $5.4 million, which provides up to 73.3% of funding. If the grant application is successful, the remaining cost of the project is proposed to be funded through borrowing to spread the cost of the project out over time, ensuring that future taxpayers also support the upgrade. $1,818,182 of this project is proposed to be financed by debt. The annual taxpayer impact represents approximately $0.68 per $100,000 of assessed residential property value.
Please contact Valentina Fazio, Engineering Technician Coordinator at vfazio@squamish.ca with any questions.
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