Previous SC 644's:
1946 ROUTE LOG
SC 64: 0 - 0
SC 145: 5.3 - 5.3
US 21: 8.9 - 14.2
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SC 644: Appeared in 1940 as new primary routing from SC 64 near Walterboro to US 21 near Smoaks.
In 1946, SC 644 was downgraded to S-15-24.
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SC 644 in central Colleton County
1940 Official
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