Northern Pacific Engineering Drawing: Sketch of New Lining, Garrison Tunnel, west of Garrison, Montana, Line Segment 042, Milepost 52.1. Sheet 1058 - 19, undated.

Northern Pacific Engineering Drawing: Sketch of New Lining, Garrison Tunnel, west of Garrison, Montana, Line Segment 042, Milepost 52.1. Sheet 1058 - 19, undated.

Northern Pacific Engineering Drawing: Sketch of New Lining, Garrison Tunnel, west of Garrison, Montana, Line Segment 042, Milepost 52.1. Sheet 1058 - 19, undated.

Northern Pacific Engineering Drawing: Sketch of Base Casting, Bridge 128 - Salmon Creek, south of Ridgefield, Washington, Line Segment 052, Milepost 128.59. Sheet 779 - 18, undated.

Northern Pacific Engineering Drawing: Sketch of Air Receiver, Bridge 53 - Willapa River, Raymond, Washington, Line Segment 420, Milepost 53.50. Sheet 429 - 1, undated.

Northern Pacific Engineering Drawing: Sketch Half Top View, Bridge 114.1 - Missoula River, west of Bonner, Montana, Line Segment 042, Milepost 114.3. Sheet 775 - 31, undated.

Northern Pacific Engineering Drawing: Sketch Guard Rail/Path, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 429 - 17, undated.