Narrow gauge, steam line constructed by the Cincinnati & Portsmouth Railroad, 1876

Renamed the Cincinnati, Georgetown & Portsmouth Railroad, 1880

Construction to Georgetown completed, 1886

Dual (narrow and standard) gauge California waterworks branch built, 1899

Converted to Standard Gauge & Electrified, Waterworks branch extended to Coney Island and broad gauge rail added,1902

Batavia branch completed, 1903

Russellville branch completed, 1905

Felicity & Bethel branch completed, 1906

Reorganized as the Cincinnati-Georgetown Railroad Co., 1927

California branch abandoned east of the waterworks, 1927

Felicity & Bethel branch abandoned, 1933

Batavia and Russellville branches abandoned, 1934

Passenger service suspended, and all service abandoned east of Bethel, 1935

All service abandoned, remaining route between Carrell Street and the waterworks sold to the city, 1936

City/waterworks use suspended, 1943