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Des Moines adopts risk-informed levee plan; SQRA reduces estimated cost and targets phases D–E
Summary
Steve Nabor, city engineer, and Patrick Bean, clean water administrator, told council members the city is using a risk-informed approach to prioritize levee fixes and pursue FEMA accreditation.
Steve Nabor, city engineer, and Patrick Bean, clean water administrator, briefed council members on the Des Moines levee alterations program and a risk-informed path to FEMA accreditation.
Nabor said the levee system includes earth embankments, flood walls, closure structures, pump stations and operation-and-maintenance responsibilities. He noted the city’s levees are hydraulically linked with Corps of Engineers levees and that updated flow-frequency studies after major floods required the city to plan alterations and submit documentation to FEMA for accreditation.
Patrick Bean explained the city used a semi-quantitative risk…
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