NO. 780-7 FIRST TRANSCONTINENTAL RAILROAD-SITE OF COMPLETION OF PACIFIC RAILROAD - The construction of the San Joaquin River bridge completed the last link of the transcontinental railroad. Building has proceeded simultaneously from the bay area and Sacramento to meet at the San Joaquin River. The first train crossed the bridge on September 8, 1869.
From I-5 take Manthey Rd interchange, take W side frontage rd and go N 1.9 mi to N bank of San Joaquin River, plaque located at entrance to Mossdale Crossing Park and Ramp, 2.0 mi N of intersection of I-5 and I-205, Tracy
The state plaque and the pillar are both missing.