Structure 19862 000 00250 · Benton County, OR

Llewellyn Road over Muddy Creek

Carries Llewellyn Road over Muddy Creek, 0250 Mi W Of HWY 99w.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT137 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

137 ft end to end, longest span 69 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.

Built200422 years old
Length137.1 ft41.8 m
Daily traffic437counted 2020
Last inspectedJuly 2024every 24 months

Location

StateOregon
CountyBenton
Location0250 Mi W Of HWY 99w
CarriesLlewellyn Road
CrossesMuddy Creek
Coordinates44.47720, -123.32360

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length137.1 ft (41.8 m)
Max Span68.6 ft (20.9 m)
Deck Width36.1 ft (11 m)
Deck Area459.8 sq m
Main Spans2
Year Built2004

Traffic

Avg Daily Traffic437 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number19862 000 00250

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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