Shell is preserving its options to drill for oil in Arctic waters next year by filing a revised exploration plan with federal officials.
A subsidiary of Royal Dutch Shell PLC filed the revised plan Thursday with the Bureau of Ocean Energy Management in Anchorage.
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Shell Alaska spokesman Curtis Smith says in an email that the plan calls for two drilling vessels to operate in the Chukchi (chuk-CHEE') Sea.
Smith says the filing of the plan is not a final decision to drill in 2015 but it lets Shell keep its options open.
The last time Shell drilled in Arctic waters was in 2012.
Smith says drilling would require a successful resolution to federal supplemental environmental work. That's required after an appeals court concluded that an environmental review preceding the 2008 Chukchi lease sale was flawed.