Northern Pacific Engineering Drawing: Detail of Howe Truss, Bridge 58 - Palouse River, west of Perma, Washington, Line Segment 384, Milepost 58.4. Sheet 434 - 15, undated.

Northern Pacific Engineering Drawing: Bill of Material, Bridge 58 - Palouse River, west of Perma, Washington, Line Segment 384, Milepost 58.4. Sheet 1069 - 36, undated.

Northern Pacific Engineering Drawing: Bill of Material, Bridge 58 - Palouse River, west of Perma, Washington, Line Segment 384, Milepost 58.4. Sheet 1069 - 36, undated.

Burlington Northern Engineering Drawing: Deck Plan, Bridge 58 - Palouse River (formerly Northern Pacific), west of Perma, Washington, Line Segment 384, Milepost 58.4. Sheet 1069 - 36, 1979.

Burlington Northern Engineering Drawing: Deck Plan, Bridge 58 - Palouse River (formerly Northern Pacific), west of Perma, Washington, Line Segment 384, Milepost 58.9. Sheet 434 - 16, 1976.