Efforts were under way this morning to remove an orange mobile construction excavator from the water near the Bay Bridge retrofit project, a Coast Guard lieutenant said.

Lt. Andrew Kennedy said the Coast Guard was told by Caltrans on Saturday that the piece of equipment had become stuck in the water.

"The tide had come in, which made it impossible for them to remove this piece of gear on their own," Kennedy said.

Kennedy said a boom was placed around it as a preventive measure. Caltrans then removed hydraulic fluid from the equipment to prevent a spill, he said.

He said there is no indication that a spill occurred.

Caltrans officials were not immediately available this morning to provide additional details.

The excavator has been removed from the water.