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Spokane, Portland and Seattle Railway Engineering Drawing: Main Drive Machinery, 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 Center Shaft, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80. Sheet RR - 440, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Main Center Shaft, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80. Sheet A - 94 - 9, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Machinery/Floor Power House, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet Z - 5 - 3, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Machinery Replacement, Bridge A84.8 - Blind Slough, west of Clifton, Oregon, Line Segment 440, Milepost 84.71. Sheet TV - 211, 1915.

Spokane, Portland and Seattle Railway Engineering Drawing: Machinery Layout/Sheave/Rope, 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: Machinery Floors, 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: Machinery Floor Beam, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet WX - 208, undated.