Great Northern Engineering Drawing: Shop Plan - Counterweight Member, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 4 2, undated.

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

Great Northern Engineering Drawing: Shop Plan - Counterweight Member, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 4 5, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight Member, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 4 7, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight Lower Plate, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 123, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight Link, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 121, undated.

Great Northern Engineering Drawing: Shop Plan - Counterweight Girder, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 124, undated.

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

Great Northern Engineering Drawing: Shop Plan - Counterweight Angle, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 251, undated.

Great Northern Engineering Drawing: Shop Plan - Concrete Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 125, undated.