Northern Pacific Engineering Drawing: Shop Plan - Top Lateral, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 423 - 1, undated.

Northern Pacific Engineering Drawing: Shop Plan - Top Lateral, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 423 - 1, 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.

Northern Pacific Engineering Drawing: Steel Repairs, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 429 - 17, undated.

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

Northern Pacific Engineering Drawing: Stringer Detail, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 429 - 17, undated.

Northern Pacific Engineering Drawing: Stringer/Bracing, Bridge 84 - Toutle River, south of Vader, Washington, Line Segment 052, Milepost 84.9. Sheet 429 - 18, undated.

Northern Pacific Engineering Drawing: Through Plate Truss Tie Plan, Bridge 81 - Cowlitz River, south of Vader, Washington, Line Segment 052, Milepost 81.5. Sheet 429 - 17, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 78 - Olequa Creek, south of Vader, Washington, Line Segment 052, Milepost 78.4. Sheet 443 - 21, 1939.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 78 - Olequa Creek, south of Vader, Washington, Line Segment 052, Milepost 78.4. Sheet 443 - 21, 1960.