Burlington Northern Engineering Drawing: Deck Plan, Bridge 37 - Little Blackfoot Creek (formerly Northern Pacific), Avon, Montana, Line Segment 042, Milepost 37.0. Sheet 441 - 52, 1973.

Burlington Northern Engineering Drawing: Deck Plan, Bridge 41 (63) (formerly Northern Pacific), west of Avon, Montana, Line Segment 042, Milepost 41.6. Sheet 441 - 40, 1973.

Northern Pacific Engineering Drawing: Concrete Shims/Shoe, Bridge 42 (65), west of Avon, Montana, Line Segment 042, Milepost 42.8. Sheet 441 - 39, undated.

Northern Pacific Engineering Drawing: Cross Frames, Bridge 41 (63), west of Avon, Montana, Line Segment 042, Milepost 41.6. Sheet 441 - 40, undated.

Northern Pacific Engineering Drawing: Detail End/Intermediate Cross Frame, Bridge 42 (65), west of Avon, Montana, Line Segment 042, Milepost 42.8. Sheet 441 - 39, undated.

Northern Pacific Engineering Drawing: Detail Floor Frame/Tie Plan, Bridge 42 (65), west of Avon, Montana, Line Segment 042, Milepost 42.8. Sheet 441 - 39, undated.

Northern Pacific Engineering Drawing: Detail of Deck Plate Girder (DPG), Bridge 42 (65), west of Avon, Montana, Line Segment 042, Milepost 42.8. Sheet 441 - 39, undated.

Northern Pacific Engineering Drawing: Falsework Raise/Repair, Bridge 41 (63), west of Avon, Montana, Line Segment 042, Milepost 41.6. Sheet 441 - 40, undated.