U. S. Army Corps of Engineers, Rock Island, IL No description specified. 1-2 (2 Records) Documents Cultural Resources Reconnaissance At Prehistoric Sites 13LA30 and 13LA38, Mississippi River Sand Slough, Louisa County, Iowa (1985) Letter Report: a Phase I Cultural Resource Survey of Emergency Streambank Stabilization Site On the Maquoketa River Near Hopkinton in Delaware County, Iowa (1990)