How to reach:
To reach the tidal bench marks from the State Capitol building on Capitol Way in Olympia, head north on Capitol Way to Fifth Avenue, head east on Fifth Avenue to Plum Street. Then head north on Plum Street, which becomes East Bay Drive at Olympia Avenue, which later becomes Boston Harbor Road at Mission Drive, for 8 km (5 mi) to 47th Avenue NE. Then head west on 47th Avenue NE for 0.5 km (0.3 mi) to a barbed-wire chain link fence at the Terminus of 47th Avenue NE to the gate which is the entrance way to the State of Washington, Department of Natural Resources (DNR) property, continue west on the property down a ravine to the DNR wharf. The bench marks were located in the vicinity and tide gauge site was on the northern end of the pier T at the westernmost end of the wharf.