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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 and Profile, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Manlift Cage, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet WX - 208, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Man Lift south Tower, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet EB 103 C - 1, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Man Lift north Tower, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet EB 103 C - 2, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Man - Lift, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet WX - 208, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Main Shaft Cast, Bridge A62.7 - Clatskanie River, west of Clatskanie, Oregon, Line Segment 440, Milepost 62.67. Sheet RR - 437, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Main Pinion, Shaft and Bearing, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 22 - 18, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Main Pinion Bearings, Bridge 5.1 - Willamette River, north of Willbridge, Oregon, Line Segment 047, Milepost 5.15. Sheet Z - 1 - 2 - 15, undated.