A fishing vessel that ran aground off Alaska's Afognak Island, leaking an estimated 3,000 to 3,500 gallons of diesel fuel was towed to the Kodiak Harbor on Friday, state officials said.

The 120-foot Sea Ern arrived at the harbor at about 7 a.m., finishing the transit under its own power, in the wake of a tow plan developed and approved by the U.S. Coast Guard and Alaska Department of Environmental Conservation. The vessel's temporary patch was reinforced before transit.

The vessel was drydocked at the City of Kodiak shipyard.

DEC officials previously identified the source of the spill as a 12-foot by 1-foot gash in the vessel's bow, which damaged two fuel tanks. The Sea Ern has an estimated 16,290-gallon fuel capacity, with 12,790 gallons remaining on board.

The remaining tanks and hull appear to be undamaged, and the valves are closed. An additional 300 gallons of other oils and lubricants are also on board.

The responsible party for the U.S.-registered Sea Ern had contacted the Alaska Chadux Network for response.

 Chadux, along with the staff of the Kitoi Bay Hatchery conducted surveys, both on water and by drone, of the inner bay around the hatchery. They surveyed the west side of Izhut Bay with limited patches of weathered sheen sighted. The Alaska Department of Fish and Game provided support to responders with overflights. Shoreline surveys near the Sea Ern grounding location continue to be conducted.

Limited sheen has been seen near the hatchery, which continues to be a priority for responders, state officials.

There continue to be no reports of impact to wildlife. Sea otters and baleen whales have been observed behaving normally and swimming in the bay.

ADF&G is continuing overflights to evaluate safely opening commercial fisheries.