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USCG Photo: Cleveland Harbor West Pierhead Lighthouse

Maritime Activity Reports, Inc.

December 20, 2010

A small break in the clouds overhead allows sunlight to momentarily illuminate the ice-covered Cleveland Harbor West Pierhead Lighthouse Dec. 14, 2010. U.S. Coast Guard photo by Petty Officer 2nd Class Lauren Jorgensen

A small break in the clouds overhead allows sunlight to momentarily illuminate the ice-covered Cleveland Harbor West Pierhead Lighthouse Dec. 14, 2010. U.S. Coast Guard photo by Petty Officer 2nd Class Lauren Jorgensen

All across the Great Lakes, high winds and subzero air temperatures caused waves to crash onto lighthouses and other aids to navigation and freeze, coating the structures and their lights in multiple layers of ice and making it impossible for mariners to see the lights or distinguish the color of the aids.