A review ordered by Delaware's transportation secretary has found that vehicles and materials are being stored under several major bridges in the state.

Transportation Secretary Shailen Bhatt ordered the review after engineers determined that a massive dirt mound dumped next to the Interstate 495 bridge over the Christina River may have caused the movement of underground soils, resulting in damage to several bridge columns and the emergency closure of the bridge on June 2.

Inspection results provided to The Associated Press on Wednesday show that 14 of 29 bridges reviewed had materials or vehicles stored underneath them or within 100 feet. Those vehicles include buses and vehicles owned by the state Department of Transportation.

The review also found that 21 of the 29 bridges have no right of way fencing.