SC 22 ALT #1: Appeared in 1936 or 1937 as a renumbering of SC 22 and SC 97 ALT, running as a loop through Great Falls
In 1947, SC 22 ALT was downgraded to S-12-20 and a bit of S-12-21. SC 22 ALT #2: Appeared by 1940 as new primary routing, running from SC 22 (now NB US 25-178 Bus) to US 221/SC 72 in central Greenwood.
In 1947, SC 22 ALT was downgraded to an unknown designation. Today it is S-24-107 Main St.

SC 22 ALT into Great Falls 1942 Chester County

SC 22 ALT in Greenwood 1940 Greenwood County