Spokane, Portland and Seattle Railway Engineering Drawing: Concrete Footings, Bridge U11.3, west of United Junction, Oregon, Line Segment 442, Milepost 11.26. Sheet RR - 281, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Concrete Footings, Bridge U16.7 - Underpass, west of United Junction, Oregon, Line Segment 442, Milepost 16.62. Sheet RR - 262, 1923.

Spokane, Portland and Seattle Railway Engineering Drawing: Firewall - Pile Trestle, Bridge U16.7 - Underpass, west of United Junction, Oregon, Line Segment 442, Milepost 16.62. Sheet NO - 300, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Pre - Boring/Bents, Bridge U16.7 - Underpass, west of United Junction, Oregon, Line Segment 442, Milepost 16.62. Sheet RS - 270A, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Pre - Boring/Bents, Bridge U16.7 - Underpass, west of United Junction, Oregon, Line Segment 442, Milepost 16.62. Sheet RS - 270C, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Pre - Boring/Bents, Bridge U16.7 - Underpass, west of United Junction, Oregon, Line Segment 442, Milepost 16.62. Sheet RS - 270B, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Pre - Boring/Bents, Bridge U16.7 - Underpass, west of United Junction, Oregon, Line Segment 442, Milepost 16.62. Sheet RS - 270D, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Pre - Boring/Bents, Bridge U16.7 - Underpass, west of United Junction, Oregon, Line Segment 442, Milepost 16.62. Sheet RS - 270E, undated.