Previous SC 645's:
1946 ROUTE LOG
SC 63: 0 - 0
SC 64: 6.9 - 6.9
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SC 645: Appeared in 1940 as new primary routing from SC 64 at the Salkehatchie River west to the current S-15-27/31 intersection.
In 1942, SC 645 was extended south to SC 63 as new primary routing.
In 1946, SC 645 was downgraded to S-15-27 and S-15-31.
SC 645 appears
1940 Official
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SC 645 extended to SC 63
1942 Official
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