Spokane, Portland and Seattle Railway Engineering Drawing: Nehalem Boom Over - Crossing, Tunnel - Nehalem Boom Crossing, United Junction, Oregon, Line Segment 442, Milepost 10.19. Sheet B - 290, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Maximum Toe Bearing, Tunnel - Nehalem Boom Crossing, United Junction, Oregon, Line Segment 442, Milepost 10.19. Sheet 20011, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Frame Details, Tunnel - Nehalem Boom Crossing, United Junction, Oregon, Line Segment 442, Milepost 10.19. Sheet 23284, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Frame Details, Tunnel - Nehalem Boom Crossing, United Junction, Oregon, Line Segment 442, Milepost 10.19. Sheet 23285, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Foundation Data, Tunnel - Nehalem Boom Crossing, United Junction, Oregon, Line Segment 442, Milepost 10.19. Sheet 23283, undated.

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: 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: Concrete Footings, Bridge U11.3, west of United Junction, Oregon, Line Segment 442, Milepost 11.26. Sheet RR - 281, undated.