GRAND ISLAND, Neb. (AP) — A Grand Island flood control project that was scheduled for completion next year is four years behind schedule and $13 million over budget.

The Grand Island City Council and Hall County Board of Supervisors were briefed on the project last week.

The project was delayed in part because of the time required to clean up buried explosives from land that once housed an ordinance plant and an insufficient drainage map. The project originally relied on watershed data from the 1980s.

Officials say the project is over budget because of an abnormal jump in construction prices over the project’s 10-year development. The price of earth-moving equipment rose in part because of China buying up American construction material and equipment, and diesel prices also went up.