The harbor suffered $17.1 million in damage not including the vessels, which hadn't been valued yet, she said.
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An 8.9-magnitude earthquake off the northeast coast of Japan caused a tsunami that killed hundreds of people before traveling across the Pacific Ocean and temporarily elevating surf levels on parts of the California coast.
The Coast Guard also set up a safety zone in Santa Cruz, asking the public to stay away from the port while crews investigate the environmental impact and facilitate clean-up.
"It's still unsafe for mariners to transit in and out (the harbor) because of debris," McKinnon said. "The sunken vessels pose a risk to navigation, and there's pollution that may be in the water."
She said the Coast Guard had received a report of an oil sheen,
which a contractor was inspecting and cleaning up today.
Helicopters crews were also evaluating the area, and anyone who sees pollution is asked to contact the Coast Guard's National Response Center so state and city officials can keep track of environmental threats.
McKinnon didn't have an estimate for when the harbor might re-open.
"Each day we're assessing," she said. "Our priority is really public safety. We're asking them to continue to keep out of this port."
Pollution can be reported by calling (800) 424-8802.
Bay City News contributed to this report.