Great Northern Engineering Drawing: Shop Plan - Counterweight Trunnion, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 311, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight Upper Plate, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 122, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 412, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 407, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 408, undated.

Great Northern Engineering Drawing: Shop Plan - Detail Bracing, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 163, undated.

Great Northern Engineering Drawing: Shop Plan - Detail Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 164, undated.

Great Northern Engineering Drawing: Shop Plan - Detail Diagonal, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 161, undated.

Great Northern Engineering Drawing: Shop Plan - Detail Diagonals, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 87, undated.

Great Northern Engineering Drawing: Shop Plan - Detail Diagonals, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 88, undated.