Previous SC 307's:
1947 ROUTE LOG
SC 3: 0 - 0
SC 508: 5.0 - 5.0
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SC 307: Appeared in 1942 as new primary routing, running from SC 3 (now US 278) Seigling northeast to SC 508 (now US 301) near Ulmers.
In 1947, SC 307 was downgraded to S-3-39.
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SC 307 in northern Allendale County
1942 Official
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