Northern Pacific Engineering Drawing: Walk Details and Bill of Material, Bridge 27 - Salmon Creek, south of Auburn, Washington, Line Segment 051, Milepost 27.6. Sheet 390 - 8681 - 5, undated.

Northern Pacific Engineering Drawing: Treated Pile Trestle, Bridge 23 - Ellingson Road, south of Auburn, Washington, Line Segment 051, Milepost 23.9. Sheet 677 - 30, undated.

Northern Pacific Engineering Drawing: Title Sheet, Bridge 23 - Ellingson Road, south of Auburn, Washington, Line Segment 051, Milepost 23.9. Sheet 677 - 30, undated.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 26 - Power Tail Race, south of Auburn, Washington, Line Segment 051, Milepost 26.2. Sheet 777 - 7, 1942.

Northern Pacific Engineering Drawing: Tie Plan, Bridge 24 - Stuck River, south of Auburn, Washington, Line Segment 051, Milepost 24.3. Sheet 433 - 33, 1937.

Northern Pacific Engineering Drawing: Tie Framing Plan, Bridge 24 - Stuck River, south of Auburn, Washington, Line Segment 051, Milepost 24.3. Sheet 433 - 33, undated.

Northern Pacific Engineering Drawing: Tie Dapping Plan, Bridge 26 - Power Tail Race, south of Auburn, Washington, Line Segment 051, Milepost 26.2. Sheet 777 - 7, undated.