Great Northern Engineering Drawing: Shim Plan, Bridge 11 - Steamboat Slough, north of Delta, Washington, Line Segment 050, Milepost 37.8. Sheet 200 - 1712 - 55, undated.

Great Northern Engineering Drawing: Right of Way Plat, Bridge 11 - Steamboat Slough, north of Delta, Washington, Line Segment 050, Milepost 37.8. Sheet 2 - 608, undated.

Great Northern Engineering Drawing: Repairs, Bridge 10 - Snohomish River, north of Delta, Washington, Line Segment 050, Milepost 37.1. Sheet 197 - 2409 - 175, 1942.

Great Northern Engineering Drawing: Repairs to Center Bearing, Bridge 10 - Snohomish River, north of Delta, Washington, Line Segment 050, Milepost 37.1. Sheet 197 - 2409 - 172, 1940.

Great Northern Engineering Drawing: Repairs 100 Foot Through Plate Girder Span, Bridge 10 - Snohomish River, north of Delta, Washington, Line Segment 050, Milepost 37.1. Sheet 197 - 2409 - 163, undated.

Great Northern Engineering Drawing: Renewal of Center Casting, Bridge 11 - Steamboat Slough, north of Delta, Washington, Line Segment 050, Milepost 37.8. Sheet 200 - 1712 - 30, 1915.

Great Northern Engineering Drawing: Rack Anchorage, Bridge 10 - Snohomish River, north of Delta, Washington, Line Segment 050, Milepost 37.1. Sheet 197 - 2409 - 174, undated.