Structure 17997 119000100 · Washington County, OR

Golf Course Road over Tualatin River Overflow

Carries Golf Course Road over Tualatin River Overflow, 010 Mi S HWY 8.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
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 FT131 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

131 ft end to end, longest span 65 ft. 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 slab bridge.

Built199729 years old
Length130.9 ft39.9 m
Daily traffic3,824counted 2020
Last inspectedSeptember 2024every 24 months

Location

StateOregon
CountyWashington
Location010 Mi S HWY 8
CarriesGolf Course Road
CrossesTualatin River Overflow
Coordinates45.50757, -123.06042

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length130.9 ft (39.9 m)
Max Span65.0 ft (19.8 m)
Deck Width40.0 ft (12.2 m)
Deck Area486.8 sq m
Main Spans2
Year Built1997

Traffic

Avg Daily Traffic3,824 (2020)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number17997 119000100

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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