DAVENPORT, Iowa (AP) — Officials in the eastern Iowa city of Davenport say the city is building a bigger flood barrier in the wake of a breach in April that sent floodwaters rushing into downtown streets. Davenport City Administrator Corri Spiegel tells the Quad-City Times that the city will build larger flood walls when there is a high probability the river cresting above 21 feet. Days after the last temporary barrier broke on April 30, the river hit a historic crest of 22.7 feet.

Davenport’s downtown sits on the banks of the Mississippi River, with no permanent floodwall. Instead, the city has an expanse of riverfront green space and temporary barriers, called HESCO barriers, consisting of large, sand-filled containers. Spiegel says Davenport public works crews began assembling the larger flood wall last week. The design uses two lines of HESCO barriers on the ground with another two stacked on top.