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| Federal and State Protected Sites, Preserved MoundsSouth DakotaFort Thompson Mounds Fort Thompson, Buffalo Co.
Fort Thompson Mounds entered into the National Registry of Historic places 1966 15 October.
Spirit Mound Vermillion, Clay Co.
Spirit Mound entered into the National Registry of Historic places 1974 19 November.
Return to the list of Federal and State protected sites, preserved sites |