Northern Pacific Engineering Drawing: Details of Timber, Bridge 11.1 - Mercer Slough, south of Wilburton, Washington, Line Segment 405, Milepost 11.5. Sheet 1264 - 16, undated.

Northern Pacific Engineering Drawing: Details of Timber, Bridge 11.1 - Mercer Slough, south of Wilburton, Washington, Line Segment 405, Milepost 11.5. Sheet 1264 - 16, undated.

Northern Pacific Engineering Drawing: Details, Bridge 11.1 - Mercer Slough, south of Wilburton, Washington, Line Segment 405, Milepost 11.5. Sheet VF 1264 - 16, undated.

Northern Pacific Engineering Drawing: Drainage, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.

Northern Pacific Engineering Drawing: Drainage, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 1282 - 5, undated.

Northern Pacific Engineering Drawing: Drainage/Grading, Bridge 11.72 - Lake Hills Boulevard, south of Wilburton, Washington, Line Segment 405, Milepost 11.7. Sheet 292 - 6678 - 17, undated.

Northern Pacific Engineering Drawing: Elevation Diagram, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.

Northern Pacific Engineering Drawing: Elevation Diagram, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.

Northern Pacific Engineering Drawing: Fitting Layout, Bridge 11.72 - Lake Hills Boulevard, south of Wilburton, Washington, Line Segment 405, Milepost 11.7. Sheet 292 - 6678 - 3, undated.

Northern Pacific Engineering Drawing: Floor Beam/Stringer Layout, Bridge 9.46 - I-90, south of Wilburton, Washington, Line Segment 405, Milepost 9.9. Sheet 2034 - 1, undated.