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Spokane, Portland and Seattle Railway Engineering Drawing: New and Pres east Abutment, Bridge 66.4 - Little White Salmon River, east of Cooks, Washington, Line Segment 047, Milepost 66.32. Sheet AA - 309, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: New Abutment and Change, Bridge 66.4 - Little White Salmon River, east of Cooks, Washington, Line Segment 047, Milepost 66.32. Sheet AA - 366, 1913.

Spokane, Portland and Seattle Railway Engineering Drawing: Nehalem Boom Over - Crossing, Tunnel - Nehalem Boom Crossing, United Junction, Oregon, Line Segment 442, Milepost 10.19. Sheet B - 290, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Navigation Lighting Details, Bridge E43.4 - Willamette River, south of Tualatin, Oregon, Line Segment 442, Milepost 43.24. Sheet 370 - 6592 - 26, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Navigation Lamps, 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: Motor Platform, Bridge E98.6 - Calapooia River, south of Albany, Oregon, Line Segment 442, Milepost 98.44. Sheet F - 5 - 2, undated.