Unalaska, AK – This weekend, a small oil spill was spotted near the light cargo dock. Petty Officer Jeffry Crews from the Coast Guard's marine safety detachment reported the incident. The sheen was about 50 wide and 2,000 feet long.

John Brown is with the Alaska Department of Environmental Conservation, and he says that the spill was likely composed of hydraulic oil.

"It had a light bluish color, so it must have been a fairly good concentration," says Brown.

There is no information on a responsible vessel, and it is believed that wind dissipated the spill. A National Response Center report was filed.