Spokane, Portland and Seattle Railway Company - Box Canyon Viaduct
- Also Known As: Bridge 270.0
- Vicinity: 2 mi N of Windust, MP 270.0, former SP and S RR line along Snake River
| Y/M/D | Person | Association | Description | Composition | Food | Event |
|---|---|---|---|---|---|---|
| Y/M/D | Person | Association | Description | Composition | Food | Event |
| 1907/00/00 | Engineers test geology and soils to inform design of the concrete pedestals. Each tower post is to stand on a rectangular pedestal 6 ft by 6 ft square at the top and of variable height. The tallest pedestal will be 35 ft high from bedrock to its top. | |||||
| 1908/00/00 | American Bridge Company | Fabricators | The American Bridge Company fabricates the steel towers and deck plate girder spans for the Box Canyon Viaduct. | |||
| 1908/08/08 | Spokane, Portland and Seattle Railway track layers working east from Pasco reach Burr Canyon, the first of the four canyon bridge sites along the Snake River. | |||||
| 1908/12/10 | Strobel Steel Company | Contractor | Racing against the coming winter, work begins on the Box Canyon viaduct, the last bridge on the entire Spokane, Portland and Seattle Railway system. Campbell and Hartman of Portland construct the abutments. | |||
| 1909/01/00 | After over a foot of snow fell in the area during the last week in December, and temperatures reach 25 below zero in early January, steam shovels working in the area fail. | |||||
| 1909/02/04 | Strobel Steel Company | Contractor | After assembling and erecting the last steel tower and intermediate spans, Strobel sends word that the last major bridge on the system is ready for track laying. | |||
| 1909/03/00 | Spokane, Portland and Seattle Railway | Owner | Box Canyon Viaduct is completed at a cost of $180,509. The Box Canyon design consists of nine steel towers reaching a peak height of 225 ft above the canyon floor. |
| Particulars for Spokane, Portland and Seattle Railway Company - Box Canyon Viaduct: | |
|---|---|
| Criteria | Architecture-Engineering |
| Structure type | Bridge |
| Other Description | Deck Plate Girder Bridge |
| Area of Significance | Engineering |
| Criteria | Historic Event |
| Historic Use | Road-related |
| Sight Category | Structure |
| Area of Significance | Transportation |
| Bridge Type | Viaduct |
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