SSH 6B was added to the state highway system in 1937. This route began at Jct PSH 6 (later SR 31, now SR 20) at Usk and headed south past Sacheen Lake, ending at Jct PSH 6 (then US 195, now US 2) southwest of Newport. When the state highway system was renumbered, SSH 6B became SR 311.
Interstate Routes
US Routes
State Routes
Primary State Hwys
Secondary State Hwys
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