Four Oregon lawmakers came together Wednesday to say they'll renew a fight to clean up Portland's harbor.

Senators Ron Wyden and Jeff Merkley, joined Congressmen Kurt Schrader, and Earl Blumenauer on a tugboat tour of the Portland Harbor. The harbor is home to Oregon's worst pollution.

Decades of defense projects, ship-building, and ship-breaking have left the waterfront layered with fuel, heavy metals, and other toxic sediments. It's listed as a Superfund site, but Congressman Blumenauer notes the Superfund lost its revenue stream back in 1995.

"There are hundreds of businesses that contributed to the pollution that are gone. It raises the costs for everybody else and makes it more complex," Blumenauer said.

Blumenauer's been working on reviving the Superfund tax. At the same time, the lawmakers say they’ll pursue a mosaic of funding options.

One possibility might be the Defense Department, since so much military and military contracting work was done in the harbor around the turn of the century. The group members say they recognize the federal government is under tremendous pressure to cut costs.