Great Northern Engineering Drawing: Add Lower Lateral Bracing, Bridge 346.1, west of Naylor, Washington, Line Segment 037, Milepost 1607.90. Sheet 269 - 5742 - 17, undated.

Great Northern Engineering Drawing: Add Masonry, Bridge 446 - Wallace River, west of Sultan, Washington, Line Segment 037, Milepost 1761.6. Sheet 194 - 1376 - 41, 1937.

Great Northern Engineering Drawing: Air Equipment, Bridge 10 - Snohomish River, north of Delta, Washington, Line Segment 050, Milepost 37.1. Sheet 197 - 2409 - 161, undated.

Great Northern Engineering Drawing: Air Machinery, Bridge 10 - Snohomish River, north of Delta, Washington, Line Segment 050, Milepost 37.1. Sheet 197 - 2409 - 91, undated.

Great Northern Engineering Drawing: Air Pipe and Conduit, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 199 - 2449 - 335, undated.

Great Northern Engineering Drawing: Alignment Plan, Bridge 379 - U S Highway 2 Undercrossing, west of Chumstick, Washington, Line Segment 037, Milepost 1685.0. Sheet 253 - 4073 - 12, 1928.

Great Northern Engineering Drawing: Alter Girder, Bridge 145 - 9 - Mile Creek, north of Slayton, Montana, Line Segment 362, Milepost 59.2. Sheet 252 - 4119 - 4, 1926.

Great Northern Engineering Drawing: Alter to 44 Inch Girders, Bridge 341, north of Andale, Montana, Line Segment 354, Milepost 96.0. Sheet 261 - 3868 - 5, undated.