Northern Pacific Engineering Drawing: Detail of Skew Ends, Bridge 164 - Gallatin River, west of Logan, Montana, Line Segment 041, Milepost 164.9. Sheet 441 - 1, undated.

Northern Pacific Engineering Drawing: Detail of Skew Ends, Bridge 164 - Gallatin River, west of Logan, Montana, Line Segment 041, Milepost 164.9. Sheet 441 - 1, undated.

Northern Pacific Engineering Drawing: Detail Reinforcement Beam Span, Bridge 3, west of Logan, Montana, Line Segment 326, Milepost 3.0. Sheet 1058 - 27, undated.

Northern Pacific Engineering Drawing: Diagram Missouri River Bridge, Bridge 206 (159) - Missouri River, west of Logan, Montana, Line Segment 041, Milepost 206.3. Sheet 441 - 2, undated.

Northern Pacific Engineering Drawing: Encasement of Bents, Bridge 4, west of Logan, Montana, Line Segment 326, Milepost 4.4. Sheet 446 - 52, 1960.

Northern Pacific Engineering Drawing: End Floor Beam/Stringers, Bridge 4.1 (7) - Madison River, west of Logan, Montana, Line Segment 326, Milepost 4.95. Sheet 441 - 54, undated.

Northern Pacific Engineering Drawing: End Post/Top Chord, Bridge 4.1 (7) - Madison River, west of Logan, Montana, Line Segment 326, Milepost 4.95. Sheet 441 - 54, undated.

Northern Pacific Engineering Drawing: End Posts/Top Chord, Bridge 4.1 (7) - Madison River, west of Logan, Montana, Line Segment 326, Milepost 4.95. Sheet 441 - 54, undated.

Northern Pacific Engineering Drawing: Expansion Bearing/70 Foot Deck Plate Girder (DPG), Bridge 4 - Bitter Root River, west of Logan, Montana, Line Segment 333, Milepost 4.4. Sheet 1256 - 15, undated.