The water instantly began to fill the streets.
Posted a video of the dam and flooding the town of Davenport in the U.S. state of Iowa.
The local authorities decided to strengthen the dam with sandbags, but it did not survive the onslaught.
Published footage shows that the nearby residents are leaving the building and trying to get on the machines. Water flows temporarily blocked people in homes, offices and shops.
Flooding in Davenport have contributed to the past in the area with heavy rains and melting snow earlier in the year.