SC 138: Appeared in 1940 as new primary routing, running from US 76/SC 13 Westminster south and east in an arc to end at SC 182.
In 1947, SC 138 was downgraded to S-37-20 and S-37-25. The S-37-25 portion is now partly under Lake Hartwell and the route east of the Lake is now S-37-603 and some of S-37-85.
