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Corps-led Little Blue River study finds sizable flood risk; plan would use dry dams, habitat restoration and federal funds
Summary
Presenters told the Lee's Summit City Council that the multi-jurisdiction feasibility study estimates about $29 million in expected annual flood losses and recommends a package of dry dams, restoration and buyouts; local governments would provide lands and long‑term maintenance while federal funding could cover about 65% of construction costs.
Tom Jacobs of the Mid-America Regional Council told the Lee's Summit City Council on July 7 that a multi-community feasibility study led with the U.S. Army Corps of Engineers has identified more than $1 billion in flood‑risk exposure across the Little Blue River watershed and estimates roughly $29,000,000 in expected annual damages when modeled over a 50‑year probabilistic period.
"We've identified more than a billion dollars of flood risk in this watershed," Jacobs said during a presentation outlining the study's tentative selected plan. He described two chief objectives: ecosystem restoration and flood‑risk reduction.
The plan presented to council members combines nonstructural measures (buyouts and elevations), targeted habitat restoration in Lee's Summit (about 17 acres of forest plantings, roughly 2 acres of herbaceous/prairie plantings and approximately 2 acres of wetlands), and structural measures on the main stem including three proposed "dry dams" sited across the watershed (one in Lee's Summit, one in Kansas City and one in Raytown). Jacobs said the modeled investments would reduce expected annual damages from roughly $29,000,000 to about $16,000,000 on average.
Project scale and funding: Jacobs described a roughly $286,000,000 price tag for flood‑risk management measures and an additional $61,000,000 for ecosystem restoration elements. He said at least 65% of construction cost could be borne by federal funding as the study advances through Corps of Engineers procedures. The study team hopes to have the Chief's Report milestone in early–mid 2027 and to position recommended projects for inclusion in a future Water Resources Development Act cycle (the presentation referenced the federal legislation as a likely funding vehicle).
Local responsibilities and timing: Jacobs and city staff emphasized that local governments would be required to provide lands, easements, rights‑of‑way and long‑term maintenance for any federal investment, and that the seven participating communities are still working through responsibilities and the identification of non‑federal sponsors. The team plans a public meeting on August 28 at Fleming Hall in Independence to present the draft tentatively selected plan and gather public comment.
Council questions and next steps: Council members asked whether affected property owners had been formally notified; Jacobs said outreach to date has been limited to informal conversations with some neighborhood representatives and stakeholder meetings with large landowners and agencies, and that formal public outreach will accompany the draft report. Council members requested Lee's Summit‑specific maps and parcel lists; Jacobs and staff agreed to package and provide city‑level details when the draft is released.
Why it matters: The proposal would reshape flood‑prone areas through a mix of land acquisition, engineered dry dams and ecological work that city staff said could produce both flood‑risk reduction benefits and recreational open space. The recommendation carries fiscal and policy implications for local governments because — even with a substantial federal share — local entities would need to identify funding sources and long‑term maintenance plans before construction could proceed.
The Corps/MARC team will present the tentatively selected plan for public review on Aug. 28; the council and staff will receive Lee's Summit‑specific materials when the draft is published.
