Colorado Road is a rural highway located in San Joaquin Valley of western Fresno County. Colorado Road services the city of San Joaquin in addition the unincorporated communities of Helm and Tranquility. Colorado Road was constructed between 1910 and 1912 as a frontage road of the Hanford & Summit Lake Railway. The roadway begins at California State Route 145 near Helm and terminates to the west at James Road in Tranquility. Part 1; the history of Colorado Road Colorado Road was constructed as frontage road connecting the sidings of the Hanford & Summit Lake Railway. The Hanford & Summit Lake Railway spanned from South Pacific Railroad West Side Line at Ingle junction southeast to the Coalinga Branch at Armona. The Hanford & Summit Lake Railway broke ground during August 1910 and was complete by April 1912. The Hanford & Summit Lake Railway established numerous new sidings. From Ingle the sidings of the line were Tranquility, Graham, San Joaquin, Caldwell, H
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