The Monona Township Culvert was a historic structure located southwest of Luana, Iowa, United States. It spanned an unnamed stream for 14 feet (4.3 m).[2]Clayton County built a number bridges over rivers, streams and ditches around the turn of the 20th-century. They contracted with Frank Boyle to build this single stone arch culvert of native limestone in 1899. The culvert was listed on the National Register of Historic Places in 1998.[1] It has subsequently been replaced.
