Great Northern Engineering Drawing: Shop Plan - New Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 406, undated.

Great Northern Engineering Drawing: Shop Plan - Operating House, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 138, undated.

Great Northern Engineering Drawing: Shop Plan - Operating House, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 131, undated.

Great Northern Engineering Drawing: Shop Plan - Operating Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 127, undated.

Great Northern Engineering Drawing: Shop Plan - Operating Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 129, undated.

Great Northern Engineering Drawing: Shop Plan - Operating Strut, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 165, undated.

Great Northern Engineering Drawing: Shop Plan - Operating Strut, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 174, 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.

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.