How to reach:
To reach the tidal bench marks from Rio Vista, proceed 8.9 km (5.5 mi) east on highway 12 from Rio Vista Bridge to the Brannan Island Road exit. Turn left on Brannan Island Road and follow around in a southerly direction for 5.0 km (3.1 mi) to Korth's Pirates Lair Marina. The tide gauge and staff were located 20 meters NW of the gas dock, on the west side of the foot ramp which must be crossed to arrive at the gas dock. The gauge and staff were mounted to two piles attached to the bulkheading between the fish cleaning station and the foot ramp. The propretor of the Marina and all property surrounding the bench marks is Lloyd Korth. The main office is approximately 50 m (164 ft) NE of the tide gauge site.