After the flooded Russian River destroyed the NWP Guerneville branch bridge at Bohemia on 19 March 1907, NWP rebuilt the bridge one-half mile downriver; and extended the Guerneville branch from Monte Rio to Duncans Mills as dual-gauge by 1909. Redwood lumber was then shipped out over the Guerneville branch. A freight transfer shed was built at San Anselmo so narrow-gauge tracks could be removed from the ferries in 1910; and more than half of the narrow-gauge freight cars were scrapped by 1912. A daily freight train operated from Occidental to San Anselmo in the morning and returned to Occidental in the afternoon. The train included a coach for Sonoma County students attending school in Tomales. A freight engine stationed at Duncans Mills was operated by the Guerneville branch freight crew as needed to bring infrequent freight down from Cazadero for transfer to the Guerneville branch until the line up Austin Creek to Cazadero was standard-gauged in 1926.