United States, Wisconsin, La Crosse, LaCrosse Co.; Island 21; Mississippi River-mile #695; T15N R7W Sec 17...Long, narrow island E side of main channel;Upper Mississippi National Wildlife Refuge;015N;07W;17
193 meters
633 ft
Age of dredge material - 5 yr ... on sand and mud flat between alluvial forest and slough, east side of island; Gramineae and Cyperaceae species form dense cover.