Although Mr. Moynihan had helped obtain $15 million to dredge the toxic sediments, no landfill had been found to dump them in.

A bill has been introduced in the Legislature to prevent toxic PCB-laden sediment dredged from the Hudson River from being sent to Niagara County.

Work is done in order to remove the toxic sediments in the lake and to improve the natural and artificial filters.

In 2011, dredging of the toxic sediment began, near Money Point as part of a larger initiative to help restore the Elizabeth River.

The new figures appeared after the state received a one-year extension this month from the Federal Environmental Protection Agency to find a site for burying the toxic sediments.

ARCO acquired the liability for the toxic sediments behind the dam when it bought Anaconda Copper Mining Company, whose activities created the sediments.

Federal and state scientists recommended removing it and its accumulated toxic sediments, at a cost to ARCO of about $100,000,000.

However, the project has met opposition because of concerns about stirring up toxic sediment on the riverbed.

It was subject to controversy and strict regulations among fears that it could disturb heavy metals and other toxic sediments mostly deposited during the industrial era of Melbourne.

Such concerns have sparked opposition from some local officials and farmers in the North Country to removing the river's toxic sediments.