The Coast Guard said a Royal Dutch Shell PLC oil rig that ran aground this week off the southern coast of Alaska doesn't appear to be spilling fuel, adding that a recovery plan won't be completed until a full assessment of the situation is available. Shell said a salvage crew boarded the Kulluk late Wednesday and spent three hours examining the drilling rig, which is owned by Shell and operated by Switzerland-based contract driller Noble Corp
The Coast Guard said a Royal Dutch Shell PLC oil rig that ran aground this week off the southern coast of Alaska doesn't appear to be spilling fuel, adding that a recovery plan won't be completed until a full assessment of the situation is available.

Shell said a salvage crew boarded the Kulluk late Wednesday and spent three hours examining the drilling rig, which is owned by Shell and operated by Switzerland-based contract driller Noble Corp. Late Monday, the drillship struck Sitkalidak Island, an uninhabited area about 300 miles southwest of Anchorage in the Gulf of Alaska.

"I can report that there are still no signs of any sheen or environmental impact, and the Kulluk appears to be stable," Capt. Paul Mehler, the Coast Guard federal on-scene coordinator, said late Wednesday after the salvage crew returned from the rig.

Aerial inspections were conducted throughout Wednesday to examine the rig, Shell and the Coast Guard said. "As we flew along the shoreline we did see four lifeboats that we believe to be from the Kulluk," he said.

Steve Russell, of Alaska's Department of Environmental Conservation, said the lifeboats' position relative to the platform was significant because any other debris would be in the same area. The team didn't see any other debris that could be identified as belonging to the rig, he said.

The rig, which until last fall was drilling the initial stages of exploratory wells in the Arctic off Alaska's northern coast, has inches-thick steel walls to ward against punctures. But it lacks equipment to propel itself through choppy seas. The rig was carrying 574,000 liters of diesel fuel and lubricants used for its own operation.

The Kulluk had encountered trouble since Friday, when the tug boat pulling it experienced engine failure, leaving the rig adrift. Attempts to tow the rig in rough weather were unsuccessful, and it crashed into the island's shore Monday night.