Mississippi Valley Archaeology Center, U of Wisconsin No description specified. 1-1 (1 Record) Documents A Phase I Archaeological Survey of 77 Acres for Proposed Expansion of the Ottumwa-Wapello Sanitary Landfill and Investigations at 13Wp363 (T73N-R14W-33), Wapello County, Iowa. Mississippi Valley Archaeology Center U of Wisconsin-LA Crosse. (2000)