KANSAS CITY - The US Army Corps of Engineers has posted its webinar on its Lower Missouri River flood risk and resilience study online.

The study is undertaken in response to record flooding in 1993, 2011 and 2019 and records showing that four of the sixth highest runoff seasons have been since 2010. It lists eight study alternatives for the 735 river miles downstream of Sioux City, Iowa, to St. Louis, Mo.

The alternatives include increase conveyance of high water by setting levees further away from the river in 50 locations and removing pinch points at bridges, as well as 15 road raises, five new levees and 18 ring levees.

The Nemaha/Atchison study is one of four current feasibility studies. A final report is expected in February of 2028. Fourteen additional spin-off studies are recommended.

• Nebraska: February 25, 2026; 6:00 p.m. CST

  • Lewis and Clark Visitors Center, 100 Valmont Dr, Nebraska City, NE

https://www.youtube.com/watch?v=dg7s02Iw-xo

_{Webinar: Increase conveyance}

The widening the flood plain with levee setbacks and bridge modifications is expected to reduce overall flood risk and flood damage, but some property currently protected by levees would be on the riverside of the levee.

The study says farmland would generally benefit with floodwaters spread out over a wider flood plain, but some land would lose levee coverage. Airports could be affected by changes in the flood plain.

The study says increasing conveyance could accelerate the ongoing trend of agricultural land being converted to habitat.