Engineers say replacing and lowering Johnson Road culvert could stop regular flooding; est. $450,000
Consultants recommended a localized fix on Johnson Road — replace and lower a misaligned culvert and regrade the upstream ditch — and gave a preliminary implementation estimate of about $450,000.
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The consultants identified an undersized and misaligned culvert at the Johnson and Monstein intersection that leaves the upstream ditch as a bathtub and causes frequent overtopping across Johnson Road. Alex Whitaker described the problem as a simple hydraulic mismatch: the downstream culvert invert sits approximately two feet higher than the upstream ditch floor so water fills the ditch before flow passes the culvert.
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