Upper Mississippi River 9-Foot Navigation Project MPS

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Lock and Dam No. 11 Historic District (Dubuque County, Iowa)
Part of the Upper Mississippi River 9-Foot Channel Project
Lock and Dam No. 13 Historic District (Whiteside County, Illinois)
Lock and Dam No. 15 Historic District (Rock Island County, Illinois)
Lock and Dam No. 16 Historic District (Muscatine County, Iowa)
Part of the Upper Mississippi River 9-Foot Channel Project
Lock and Dam No. 17 Historic District (Mercer County, Illinois)
Lock and Dam No. 18 Historic District (Henderson County, Illinois)
Lock and Dam No. 20 Historic District (Lewis County, Missouri)
Lock and Dam No. 21 Historic District (Adams County, Illinois)
Lock and Dam No. 22 Historic District (Ralls County, Missouri)
Lock and Dam No. 25 Historic District (Lincoln County, Missouri)
Mississippi River Lock and Dam No. 6 (Trempealeau County, Wisconsin)
Part of the Upper Mississippi 9 Foot Navigation Project