Great Northern Railway Historical Society Blueprint Collection JSBP3968, Mount Vernon, Washington, 1891. Great Northern Blueprint Number 11.707, Bridge # 36. Bridge Over Skagit River. Interstate Commerce Commission Account Number 6, Bridges, Trestles, and Culverts. Other ICC account descriptions: ICC Account Number 6, Bridge.

Great Northern Engineering Drawing: Water Elevations, Bridge 36 - Skagit River, north of Mount Vernon, Washington, Line Segment 050, Milepost 70.0. Sheet 6 - 908, undated.

Great Northern Engineering Drawing: Vicinity Map, Bridge 36 - Skagit River, north of Mount Vernon, Washington, Line Segment 050, Milepost 70.0. Sheet 12 - 822, undated.

Great Northern Engineering Drawing: Steel Ties - Ends Drawspan, Bridge 36 - Skagit River, north of Mount Vernon, Washington, Line Segment 050, Milepost 70.0. Sheet 200 - 1714 - 94, undated.

Great Northern Engineering Drawing: Steel Repairs, Bridge 36 - Skagit River, north of Mount Vernon, Washington, Line Segment 050, Milepost 70.0. Sheet 200 - 1714 - 106, 1964.

Great Northern Engineering Drawing: Stairs to Operating House, Bridge 36 - Skagit River, north of Mount Vernon, Washington, Line Segment 050, Milepost 70.0. Sheet 200 - 1714 - 48, undated.

Great Northern Engineering Drawing: Soundings - Skagit River, Bridge 36 - Skagit River, north of Mount Vernon, Washington, Line Segment 050, Milepost 70.0. Sheet 11 - 707 - 2, undated.

Great Northern Engineering Drawing: Slide Easer Bar Joint, Bridge 36 - Skagit River, north of Mount Vernon, Washington, Line Segment 050, Milepost 70.0. Sheet 200 - 1714 - 79, undated.