Northern Pacific Engineering Drawing: Girder Plan/Detail of Slabs, Bridge 24, west of Park City, Montana, Line Segment 041, Milepost 24.3. Sheet 1068 - 9, undated.

Northern Pacific Engineering Drawing: Girder Plan Details - Slab, Bridge 3 - 10 - Mile Creek, west of Helena, Montana, Line Segment 042, Milepost 3.1. Sheet 1076 - 69, undated.

Northern Pacific Engineering Drawing: Girder Layout, Bridge 3.1 - Union Pacific Railroad. & Highway, west of Empire, Washington, Line Segment 046, Milepost 3.48, undated.

Northern Pacific Engineering Drawing: Girder Framing Plan, Bridge 3.1 - Union Pacific Railroad. & Highway, west of Empire, Washington, Line Segment 046, Milepost 3.48, undated.

Northern Pacific Engineering Drawing: Girder Framing Plan, Bridge 1 (I-5), east of Rye Junction, Washington, Line Segment 438, Milepost 1.55. Sheet 2015 - 2, undated.

Northern Pacific Engineering Drawing: Girder Framing Plan, Bridge 1 (I-5), east of Rye Junction, Washington, Line Segment 438, Milepost 1.55. Sheet 2004 - 6, undated.

Northern Pacific Engineering Drawing: Girder Frame/Bracing, Bridge 4 - Walla Walla River, Zangar Junction, Washington, Line Segment 451, Milepost 4.45. Sheet 772 - 2, undated.

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

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

Northern Pacific Engineering Drawing: Girder Elevation, Bridge 3.1 - Union Pacific Railroad and Highway, west of Empire, Washington, Line Segment 046, Milepost 3.48, undated.