Northern Pacific Engineering Drawing: Timber Protection, Bridge 1 - Columbia River, west of Pasco, Washington, Line Segment 048, Milepost 1.32. Sheet 290 - 1, undated.

Northern Pacific Engineering Drawing: Timber Details/Beam/Material, Bridge 73 - Clark Fork River, west of Noxon, Montana, Line Segment 044, Milepost 73.0. Sheet 1060 - 50, 1955.

Northern Pacific Engineering Drawing: Timber Detail/Beam/Material, Bridge 50 - Beaver Creek, west of Childs, Montana, Line Segment 044, Milepost 50.7. Sheet 1060 - 49, 1955.

Northern Pacific Engineering Drawing: Timber Detail Timber Truss, Bridge 51 - Hannaford Creek, south of Wabash, Washington, Line Segment 052, Milepost 51.9. Sheet 443 - 26, undated.

Northern Pacific Engineering Drawing: Timber Approach, Bridge 87 - Highway 20, Sedro - Woolley, Washington, Line Segment 403, Milepost 87.05. Sheet 1233 - 16, undated.

Northern Pacific Engineering Drawing: Timber Approach Trestle, Bridge 55 - Trout Creek, west of Trout Creek, Montana, Line Segment 044, Milepost 55.1. Sheet 1281 - 2, undated.

Northern Pacific Engineering Drawing: Timber Approach Trestle, Bridge 0 - Esquatzel Coulee, west of Mesa, Washington, Line Segment 454, Milepost 0.41. Sheet 2032 - 1, undated.