The Fraser Is Rising. Maple Ridge's Flood Protection Is Not Ready.

Climate projections show increasing flood risk along the Fraser River corridor through Maple Ridge. The dike system protecting riverside neighbourhoods has known vulnerabilities. The timeline for addressing them does not match the timeline of the risk.

The Fraser River built Maple Ridge. The river's annual cycle — the spring freshet swelling from mountain snowmelt, the summer recession, the fall rains — shaped the landscape, the agriculture, the settlement patterns of this corner of the Lower Mainland. For most of that history, the river's behaviour was predictable enough that communities could plan around it.

That predictability is ending. Climate modelling consistently projects more extreme precipitation events, more variable snowpack, and higher peak freshet levels for the Fraser system over the coming decades. For Maple Ridge, which sits in the river's floodplain in several of its most established and densely populated areas, this is not a distant risk. It is an approaching one.

The dike system protecting Maple Ridge's riverside areas has vulnerabilities that have been identified in engineering assessments and acknowledged in municipal planning documents. Some sections are undersized for projected peak flows. Some have structural issues that routine maintenance has not fully addressed.

The timeline for upgrading them extends, in current plans, well past the period during which climate risk models project significant increases in flood probability. The funding gap between what the upgrades will cost and what is currently allocated is substantial.

Maple Ridge is not unique in this situation. Communities up and down the Fraser are facing the same combination of aging dike infrastructure and increasing climate risk. What Maple Ridge can do — and should do urgently — is push harder for the provincial and federal funding that will close that gap before a flood event makes the cost of inaction obvious.

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