Structure 11280 507 01383 · Tillamook County, OR

Foss Road over Salmonberry River

Carries Foss Road over Salmonberry River, 11.0 Mi NE Mohler.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT243 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

243 ft end to end, longest span 92 ft: about 3 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1964rebuilt 2012
Length243.4 ft74.2 m
Daily traffic106counted 2020
Last inspectedJune 2024every 12 months

Location

StateOregon
CountyTillamook
Location11.0 Mi NE Mohler
CarriesFoss Road
CrossesSalmonberry River
Coordinates45.74985, -123.65287

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length243.4 ft (74.2 m)
Max Span91.9 ft (28 m)
Deck Width24.0 ft (7.3 m)
Deck Area541.7 sq m
Main Spans4
Year Built1964 (reconstructed 2012)

Traffic

Avg Daily Traffic106 (2020)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number11280 507 01383

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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