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City briefs council on 40 Second Street levee risk, Corps feasibility study and $447,055 city share
Summary
Emergency management staff described a Dogami study showing channel migration threats to the 40 Second Street levee, outlined a Corps of Engineers feasibility study estimated at $894,110 (city share $447,055), proposed $151,000 in work-in-kind to reduce cash payments, and noted Corps construction cap of $10 million; councilors asked about federal ownership transfers and long-term costs.
Emergency Manager Ken Vogany told the council a recent state study and Corps review confirm a measurable risk of channel migration that could undermine the city-owned 40 Second Street levee and outlined a Corps of Engineers feasibility study the city is preparing to cost-share.
Vogany said the Oregon Department of Geology and Mineral Industries (Dogami) mapped channel migration since 1964 and identified a high-risk migration band that lies on the 40 Second Street side of the levee. "Their study indicates that the river channel could move to and through and under the levee causing the levee to fail," he said, and noted the analysis used the 1964…
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