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

Spokane, Portland and Seattle Railway Engineering Drawing: Track Details, Bridge T74.6 - Deschutes River, south of Dixon, Oregon, Line Segment 053, Milepost 74.65. Sheet Z - 5 - 6 - 6, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Towers for Telegraph, Bridge T0.4 - Columbia River, south of Wishram, Washington, Line Segment 053, Milepost 0.37. Sheet NO - 302, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Tower Stress Sheet, 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: Tower Spans - Girders, Bridge 270.0 - Box Canyon, north of Farrington, Washington, Line Segment 047, Milepost 270.0, undated.

Spokane, Portland and Seattle Railway Engineering Drawing: Tower Sheave/Equalizer, 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: Tower Hood, 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: Tower Hood Detail, 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: Tower Details, Bridge A29.4S, west of Saint Helens, Oregon, Line Segment 440, Milepost 0.40. Sheet NO - 243, undated.