This 7-mile wooden monorail was proposed to be the first rail line built to connect the Northern California city of Sonoma with a steam ship landing at San Pablo Bay. Only three and a half miles were built, between Norfolk and Sonoma. The line operated from November 23, 1876 to May 5, 1877. The company went into bankruptcy that year. The track was 15 inches high and cost $4,500 per mile to build, half the cost of narrow guage railroads of the time. Promoter Joseph S. Kohn's plans to extend it to Sonoma Landing on the Petaluma River were never realized. Kohn also proposed an elevated prismoidal rail for San Francisco along Market Street, but land owners along the line objected.