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The community of Blue Grass is situated 5 miles west of Davenport on US 61. The Nebergall round barn is on Telegraph Road, 2.5 miles east of route Y40 at Blue Grass. The architect/builder, Benton Steele, designed and constructed round barns throughout the Midwest from 1907 to 1923. The Nebergall barn is the only example of his work still standing in Iowa. The design is realized in terracotta bricks and board-and-batten wood siding; the barn has a double-pitched gable roof, topped at the center by a conical cupola.