EPOCH Update Information:
To reach the tidal bench marks from north bound lane of U.S. Interstate Highway 93 and the Atlantic and Northern Avenues exits in Boston, proceed to the U.S. Coast Guard Building at the intersection of Atlantic and Northern Avenues. The bench marks are in the vicinity of the U.S. Coast Guard Building, U.S. Custom House, U.S. Post Office and at the intersection of Purchase and High Streets. The tide station is located on the right side of the U.S. Coast Guard Building adjacent to Northern Avenue Bridge.