MOUNT VERNON, Wash. (AP) — Officials in Washington state performed a special inspection six months ago on the Interstate 5 bridge that collapsed because there were indications it had been struck by a different vehicle.

An inspection report released Friday by the state Department of Transportation says inspectors brought in a bucket truck to examine the structure and identified tears, deformations and gouges on the northbound side of the bridge.

The report says the special checkup was done due to "impact damage," although state officials did not respond to a phone call seeking more detail.

The inspection report also details a variety of other problems with the bridge, including vegetation growing in panels, and rust. It also summarizes a variety of parts on the bridge that have been subjected to "high-load" hits.