Approximately 420 gallons of crude oil, hull damage.
Due to ice conditions, the vessel master of the Chesapeake Trader
decide to cease transfer operations
and pull away from the dock at Nikiske heading south in Cook Inlet,
vessel crew observed a sheen trailing from the tanker.
A crack was discovered in the No 1 starboard wing tanks
near the waterline.
Damage to the hull was likely caused
by collision with a heavy ice floe.
The oil in the damaged tank was transferred to other undamaged tanks
on the vessel.
No shoreline or wildlife impacts from the leaked oil
have been observed.
As a result of this incident, Tesoro, Mormac, Attranasco and the
Southwest Pilots developed guidelines
to assist masters when prolonged periods of sub-zero
temperatures increase the amount of ice coverage
and the hardness of the ice.
The guidelines were approved by ADEC and the US Coast Guard.