Great Northern Engineering Drawing: Sections - Abutment 19, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 18, undated.

Great Northern Engineering Drawing: Revision Calculations - Counterweight, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449, 1948.

Great Northern Engineering Drawing: Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 469, 1949.

Great Northern Engineering Drawing: Repairs, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 469A, 1949.

Great Northern Engineering Drawing: Repairs Fastener Operator, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 373, undated.

Great Northern Engineering Drawing: Repairs - Stub Stringer, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 475, 1951.

Great Northern Engineering Drawing: Repairs - Solenoid Breakers, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 91, undated.

Great Northern Engineering Drawing: Repairs - Operating Strut Bracket, Bridge 4 - Salmon Bay, Ballard, Washington, Line Segment 050, Milepost 6.3. Sheet 198 - 2449 - 92, undated.