Northern Pacific Engineering Drawing: 30 Foot Beam Span, Bridge 28 - south Pine Creek, south of Rosalia, Washington, Line Segment 384, Milepost 28.5. Sheet 782 - 9, undated.

Northern Pacific Engineering Drawing: 30 Foot Beam Spans, Bridge 55 - Trout Creek, west of Trout Creek, Montana, Line Segment 044, Milepost 55.1, undated.

Northern Pacific Engineering Drawing: 30 Foot Deck Plate Girder (DPG) /44, Bridge 3 - 10 - Mile Creek, west of Helena, Montana, Line Segment 042, Milepost 3.1. Sheet 1076 - 69, undated.

Northern Pacific Engineering Drawing: 30 Foot Deck Plate Girder (DPG) Span, Bridge 9 - Black River, Black River, Washington, Line Segment 051, Milepost 9.7. Sheet 433 - 26, undated.

Northern Pacific Engineering Drawing: 30 Foot Deck Plate Girder (DPG), Bridge 9 - Black River, Black River, Washington, Line Segment 051, Milepost 9.7. Sheet 433 - 26, undated.

Northern Pacific Engineering Drawing: 30 Foot Girder Span Recondition, Bridge 36.8 - west Waterway, West Seattle, Washington, Line Segment 051. Sheet 1063 - 36, undated.

Northern Pacific Engineering Drawing: 30 Foot I - Beam Span, Standard Plan, Line Segment 999. Sheet 1274 - 11, undated.

Northern Pacific Engineering Drawing: 30 Foot Prestressed Concrete, Bridge 108, west of Cunningham, Washington, Line Segment 046, Milepost 108.61. Sheet 388 - 8682, undated.

Northern Pacific Engineering Drawing: 30 Foot Prestressed Concrete, Bridge 129 - Esquatzel Coulee, Eltopia, Washington, Line Segment 046, Milepost 129.46. Sheet 388 - 8495, undated.

Northern Pacific Engineering Drawing: 30 Foot Prestressed Concrete, Bridge 17.1 - County Road, south of Kent, Washington, Line Segment 051, Milepost 17.5. Sheet 388 - 8722, undated.