Great Northern Engineering Drawing: Repair Main Counterweight Trunnion, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 484, undated.

Great Northern Engineering Drawing: Reinforcement Steel, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 17, 1912.

Great Northern Engineering Drawing: Reinforcement Steel, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 20, 1912.

Great Northern Engineering Drawing: Reinforcement Member 20 - 29, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 474, 1951.

Great Northern Engineering Drawing: Rack Segment - Bridge Number 4, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 480, undated.

Great Northern Engineering Drawing: Proposed Bearing Operating Shaft, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 378, undated.

Great Northern Engineering Drawing: Preliminary Layout, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 30, undated.

Great Northern Engineering Drawing: Preliminary Layout, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 31, undated.

Great Northern Engineering Drawing: Plan Replace Gas Engine, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 405, undated.

Great Northern Engineering Drawing: Plan of Undercrossing, Bridge 7.9 - Seaview Avenue, Ballard, Washington, Line Segment 050, Milepost 7.9. Sheet 250 - 4618 - 4, undated.