Spokane, Portland and Seattle Railway Engineering Drawing: Renew Bridge, Bridge A29.4S, west of Saint Helens, Oregon, Line Segment 440, Milepost 0.40. Sheet WX - 224, 1958.

Spokane, Portland and Seattle Railway Engineering Drawing: Renew Bridge, Bridge A29.4S, west of Saint Helens, Oregon, Line Segment 440, Milepost 0.40. Sheet WX - 224 - B, 1959.

Spokane, Portland and Seattle Railway Engineering Drawing: Renew Bridge, Bridge A29.4S, west of Saint Helens, Oregon, Line Segment 440, Milepost 0.40. Sheet WX - 224 - A, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Trestle, Bridge A28.1S - Milton Creek, west of Saint Helens, Oregon, Line Segment 440. Sheet N - 1 - 13, 1931. Note: Pile trestle

Spokane, Portland and Seattle Railway Engineering Drawing: Temporary Bents, Bridge A27.4 (159) - Milton Creek, Saint Helens, Oregon, Line Segment 440, Milepost 27.40. Sheet 230 - 8069 - 1, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Through Plate Girder, Bridge A27.4 (159) - Milton Creek, Saint Helens, Oregon, Line Segment 440, Milepost 27.40, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Through Plate Girder/Diagram of Types, Bridge A27.4 (159) - Milton Creek, Saint Helens, Oregon, Line Segment 440, Milepost 27.40, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Tie Frame Plan, Bridge A26.5 (164?) - (No Suggestions) Creek, west of Saint Helens, Oregon, Line Segment 440, Milepost 26.51. Sheet WW - 376, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Tie Framing Plan, Bridge A27.4 (159) - Milton Creek, west of Saint Helens, Oregon, Line Segment 440, Milepost 22.40. Sheet WW - 375, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Tower Details, Bridge A29.4S, west of Saint Helens, Oregon, Line Segment 440, Milepost 0.40. Sheet NO - 243, undated.