pA US Coast Guard ice breaker broke through thick ice on the Penobscot River in Maine on Wednesday, January 31. The USCGC Penobscot Bay had to ram through 16-24 inches of ice with another four inches of snow on top, the coast guard said.ppThis ship made it to Bangor. It was one day after the coast guard suspended operationsa breaking ice on the Kennebec River, where thick sections of ice did not break free.