BridgeHunter.com: Skipanon River Bridge

The Skipanon River Bridge on the Fort Stevens Highway Spur is an example of a small scale moveable bridge built by the Oregon State Highway Department.

The bridge consists of three spans, single concrete girder approach spans with a steel girder main span.

The main span was originally designed to be movable with the span hinging upward in a bascule. The draw opperations ware all manual.

The moveable span was fixed at an unknown date.

Overview: Steel stringer bridge over Skipanon River on OR-104 Spur (Old US-101)

Location: Warrenton, Clatsop County, Oregon

Status: Open to traffic

History: Built 1929

Design: Steel stringer/girder main span with concrete girder approach span.

Dimensions

Length of largest span: 45.9 ft.

Total length: 130.0 ft.

Deck width: 24.0 ft.

Recognition

Eligible for the National Register of Historic Places

Average daily traffic (as of 2010)

2,289

Inventory numbers

OR 01400 (Oregon Dept. of Transportation structure number)

BH 84678 (Bridgehunter.com ID)

BridgeReports.com: HWY 485 over SKIPANON RIVER

Latest Available Inspection: March 2018

Good/Fair/Poor Condition: Poor

Status: Posted for load [P]

Average daily traffic: 2,289 [as of 2010]

Truck traffic: 4% of total traffic

Deck condition: Poor [4 out of 9]

Superstructure condition: Fair [5 out of 9]

Substructure condition: Satisfactory [6 out of 9]

Structural appraisal: Basically intolerable requiring high priority of corrrective action [3]

Deck geometry appraisal: Basically intolerable requiring high priority of replacement [2]

Water adequacy appraisal: Equal to present desirable criteria [8]

Roadway alignment appraisal: Equal to present desirable criteria [8]

Channel protection: Bank protection is being eroded. River control devices and/or embankment have major damage. Trees and rush restrict the channel. [5]

Pier/abutment protection: Navigation protection not required [1]

Scour condition: Bridge foundations determined to be stable for assessed or calculated scour conditions; field review indicates action is required. [4]

Sufficiency rating: 26.7

Recommended work: Widening of existing bridge or other major structure without deck rehabilitation or replacement [33]

Estimated cost of work: $665,000

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