Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Foundations, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80, undated.
Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Foundations, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80, undated.
Spokane, Portland and Seattle Railway Engineering Drawing: Plan of Foundations, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80, 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: Latch Bar Cranks, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80. Sheet WW - 380, undated.
Spokane, Portland and Seattle Railway Engineering Drawing: General Plan, Bridge A86.6 - Overpass, Knappa, Oregon, Line Segment 440, Milepost 84.71. Sheet TV - 426, 1961. Note: Frame trestle
Spokane, Portland and Seattle Railway Engineering Drawing: General Plan of Lock Gears, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80, undated.
Spokane, Portland and Seattle Railway Engineering Drawing: General Plan of Center, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80, undated.
Spokane, Portland and Seattle Railway Engineering Drawing: General Plan and Details, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80. Sheet NO - 209, undated.
Spokane, Portland and Seattle Railway Engineering Drawing: Foundations, Bridge A94.9 - John Day River, west of Knappa, Oregon, Line Segment 440, Milepost 94.80. Sheet N - 2 - 13, undated.