Spokane, Portland and Seattle Railway Engineering Drawing: Deck Girder Spans, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet Z - 7 - 24 - 4, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Details of Costs, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet RR - 547, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Erection Device, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet Z - 7 - 24 - 5, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Map of Ravine Section, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet 0 - 4 - 14, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Map Showing Topography, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet 0 - 4 - 14, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Progress Profile, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet BB - 549, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Bill of Material, Bridge T125.7 - Crooked River, south of Opal City, Oregon, Line Segment 053, Milepost 125.71. Sheet Z - 7 - 26 - 5, undated.