Office of Engineer Dallas County No description specified. 1-2 (2 Records) Documents A Phase I Archaeological Survey of a Proposed Bridge Replacement (Federal #131260) and Road Realignment Project 0-40 / 0-44, Dallas County (1990) A Phase I Archaeological Survey of Proposed Bridge Replacement (FHWA # 132520) and Road Relocation, Project C-30, Dallas County, Iowa (1993)