Great Northern Engineering Drawing: Shop Plan - Main Trunnion, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 312, undated.

Great Northern Engineering Drawing: Shop Plan - Machinery Girder, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 236, undated.

Great Northern Engineering Drawing: Shop Plan - Machinery Girder, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 243, undated.

Great Northern Engineering Drawing: Shop Plan - Machinery Girder, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 242, undated.

Great Northern Engineering Drawing: Shop Plan - Lower Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 116, undated.

Great Northern Engineering Drawing: Shop Plan - Ladder and Railing, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 241, undated.

Great Northern Engineering Drawing: Shop Plan - Ladder and Brackets, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 219, undated.

Great Northern Engineering Drawing: Shop Plan - Intermediate Metal, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 119, undated.

Great Northern Engineering Drawing: Shop Plan - Hand Operator, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 320, undated.

Great Northern Engineering Drawing: Shop Plan - General Machinery, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 126, undated.