Great Northern Engineering Drawing: Shop Plan - Rails Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 418, undated.

Great Northern Engineering Drawing: Shop Plan - Rack, Gears, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 315, undated.

Great Northern Engineering Drawing: Shop Plan - Posts, Angle, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 245, undated.

Great Northern Engineering Drawing: Shop Plan - Posts etc., Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 189, undated.

Great Northern Engineering Drawing: Shop Plan - Portal Struts and Laterals, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 196, undated.

Great Northern Engineering Drawing: Shop Plan - Portal Bracket, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 76, undated.

Great Northern Engineering Drawing: Shop Plan - Pocket Cover, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 249, undated.

Great Northern Engineering Drawing: Shop Plan - Plates, Angle, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 244, undated.

Great Northern Engineering Drawing: Shop Plan - Plates, Angle, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 246, undated.

Great Northern Engineering Drawing: Shop Plan - Plates and Angle, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 248, undated.