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Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet NO - 303, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, 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: Operators House, Bridge E126.9 - Willamette River, south of Harrisburg, Oregon, Line Segment 442, Milepost 125.99. Sheet V - 4 - 5, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, Bridge 8.8 - Oregon Slough, North of North Portland Junction, Washington, Line Segment 047, Milepost 8.62. Sheet NO 421, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet NO 421D, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet NO 421C, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet NO 421F, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet NO 4212, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operators House, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet NO 421A, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Operating Room, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 10 - 18, undated.