Great Northern yard office at Delta, Washington, undated. Photograph by Cordell Newby.

Great Northern yard office at Delta, Washington, undated. yard office - Delta Washington, photograph by Don Tank.

Northern Pacific Engineering Drawing: Foundation Details, Sand Tower, Delta, Washington, Line Segment 408. Sheet 313 - 5944 - 1, undated.

Northern Pacific Engineering Drawing: General Plan, Sand Tower, Delta, Washington, Line Segment 408. Sheet 313 - 5944 - 4, undated.

Northern Pacific Engineering Drawing: Location Sketch Piping Plan, Sand Tower, Delta, Washington, Line Segment 408. Sheet 313 - 5944 - 3, undated.

Northern Pacific Engineering Drawing: Masonry Details, Sand Tower, Delta, Washington, Line Segment 408. Sheet 313 - 5944 - 5, undated.

Northern Pacific Engineering Drawing: Repairs, Sand Tower, Delta, Washington, Line Segment 408. Sheet 313 - 5944 - 2, undated.