Northern Pacific Engineering Drawing: Bearings, Bridge 23.47 - Underpass (I-5), south of Ketron, Washington, Line Segment 052, Milepost 23.9. Sheet 2000 - 3, undated.

Northern Pacific Engineering Drawing: Concrete Deck, Bridge 23.47 - Underpass (I-5), south of Ketron, Washington, Line Segment 052, Milepost 23.9. Sheet 2000 - 3, undated.

Northern Pacific Engineering Drawing: Deck Drainage, Bridge 23.1 - Underpass, south of Ketron, Washington, Line Segment 052, Milepost 24.0. Sheet 1070 - 3, undated.

Northern Pacific Engineering Drawing: Deck Slab - Number Track, Bridge 23.1 - Underpass, south of Ketron, Washington, Line Segment 052, Milepost 24.0. Sheet 1070 - 3, undated.

Northern Pacific Engineering Drawing: Deck Slabs - south Track, Bridge 23.1 - Underpass, south of Ketron, Washington, Line Segment 052, Milepost 24.0. Sheet 1070 - 3, undated.

Northern Pacific Engineering Drawing: Drainage, Bridge 23.47 - Underpass (I-5), south of Ketron, Washington, Line Segment 052, Milepost 23.9. Sheet 2000 - 3, undated.

Northern Pacific Engineering Drawing: Erection Plan, Bridge 23.1 - Underpass, south of Ketron, Washington, Line Segment 052, Milepost 24.0. Sheet 1077 - 2, undated.

Northern Pacific Engineering Drawing: General Plan - Approach Girder, Bridge 23.1 - Underpass, south of Ketron, Washington, Line Segment 052, Milepost 24.0. Sheet 1070 - 3, undated.