New Haven — A propane tank that had been missing since 2011 was removed from the Connecticut River Saturday by the Coast Guard and federal, state and local partners, the Coast Guard said Tuesday.

After being notified last Wednesday that an approximately 1,000 gallon tank was seen floating down the river near Middletown, Coast Guard pollution responders, Connecticut Department of Energy and Environmental Protection personnel and Coast Guard Auxiliary aircraft searched the area but found nothing.

The tank was found on Haddam Island on Friday during a Connecticut National Guard helicopter training flight.

Coast Guard pollution responders and the Haddam Volunteer Fire Department worked with response personnel from Moran Environmental Recovery LLC to safely move the tank from the island to shore.

The company that owns the tank said it had been missing since Tropical Storm Irene in 2011. The Coast Guard said the tank's presence in the river does not appear to have had any negative environmental impact.