Plymouth County Fair Round Barn (New for 2024), 500 4th Avenue NE, Le Mars (Plymouth County)
Built by H.P. Tonsfeldt for his Polled Hereford show cattle. Construction began in 1918 and took three years to complete. Barn is 61 ft in diameter and 68 ft tall with a 13.5 ft central silo. The barn was gifted to the Plymouth County Fair, and the $30,000 needed to move and restore the barn came from community fundraising and a match from the fair board. The barn was moved to is current home at the fairgrounds in Sept. 1981. During the Fair, the Round Barn is home to educational agricultural displays. The barn is listed in the National Register of Historic Places (Award of Distinction).
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