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Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Towers, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet Z - 6 - 11 - 22, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Towers, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet JK - 205 - 72, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Towers, Bridge 291.4 - Oregon - Washington Railroad and Navigation Company Crossing, Washtucna, Washington, Line Segment 047, Milepost 291.4. Sheet 0 - 4 - 15, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Tower Posts, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet Z - 6 - 11 - 32, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Tower Posts, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 23 - 9, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Tower Posts, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 3 - 17, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Tower Portal, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet JK - 205 - 40, undated.