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Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Post and Laterals, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 17 - 7, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portals - PB, Bridge 8.8 - Oregon Slough, north of North Portland Junction, Oregon, Line Segment 047, Milepost 8.62. Sheet Z - 3 - 23 - 22, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal/Strut, Bridge E98.6 - Calapooia River, south of Albany, Oregon, Line Segment 442, Milepost 98.44. Sheet 194 - 1376 - 23, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal/Lateral, Bridge 72.8 - White Salmon River, east of Hood, Washington, Line Segment 047, Milepost 72.80. Sheet JK - 319, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal/Frame, Bridge T74.6 - Deschutes River, south of Dixon, Oregon, Line Segment 053, Milepost 74.65. Sheet Z - 7 - 22 - 22, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal/Brace, Bridge S - 31.3 - Wylie Creek, Foster, Oregon, Line Segment 457, Milepost 31.29. Sheet P - 3 - 1, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal, etc., Bridge E35.3 - Tualatin River, south of Tigard, Oregon, Line Segment 442, Milepost 35.21. Sheet 215 - 1314 - 7, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet Z - 5 - 9 - 15, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet Z - 5 - 10 - 6, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Shop Plan - Portal, Bridge 9.6 - Columbia River, Vancouver, Washington, Line Segment 047, Milepost 9.31. Sheet Z - 2 - 17 - 10, undated.