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Spokane, Portland and Seattle Railway Engineering Drawing: west Pier Frame Bent, Bridge E71.6 - Mill Creek, south of Salem, Oregon, Line Segment 442, Milepost 71.26. Sheet SS - 448, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: west Access Map, Bridge 7.4 - Columbia Slough, north of East Saint Johns, Oregon, Line Segment 047, Milepost 7.40. Sheet RR - 350, 1943. Note: Steel spans and AFE truss

Spokane, Portland and Seattle Railway Engineering Drawing: west Abutment, Bridge G2.1 - County Road, north of Lyle, Washington, Line Segment 439, Milepost 2.02. Sheet NO - 417 - E, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: west Abutment, Bridge 66.4 - Little White Salmon River, east of Cooks, Washington, Line Segment 047, Milepost 66.32. Sheet N - 2 - Z, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: west Abutment, Bridge 5.7 - Union Pacific Railroad, north of Willbridge, Oregon, Line Segment 047, Milepost 5.73. Sheet AA - 403, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: west Abutment, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0. Sheet AA - 344, undated.