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Spokane, Portland and Seattle Railway Engineering Drawing: south Span Tie Plan, Bridge 24.8 - Washougal River (West End), Washington, Line Segment 047, Milepost 28.78. Sheet 00 - 618 - A, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: south Approach, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet Z - 5 - 1 - 3, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge T74.6 - Deschutes River, south of Dixon, Oregon, Line Segment 053, Milepost 74.65. Sheet 0 - 3 - 24, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge E126.9 - Willamette River, south of Harrisburg, Oregon, Line Segment 442, Milepost 125.99. Sheet S - 5 - 15, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Soundings, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31, undated.