US Bridges

Llewellyn Road over Muddy Creek

Fair

Benton County, Oregon · 0250 MI W of HWY 99W · Structure no. 19862 000 00250

Built
2004
21 years old
Condition
Fair
inspected July 2024
Type
Slab
Prestressed Concrete
Length
137 ft
2 main spans
Daily traffic
437
2020 count
Owner
County
County Highway Agency

About this bridge

Llewellyn Road over Muddy Creek is a prestressed concrete slab carrying Llewellyn Road over Muddy Creek in Benton County, Oregon. It was built in 2004, so it is 21 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 437 vehicles a day, roughly 2% of them trucks, projected to reach 583 by 2040. The structure is 137 ft (41.8 m) long and 36 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesLlewellyn Road
CrossesMuddy Creek
Location0250 MI W of HWY 99W
RouteCounty Highway 0
CountyBenton County
StateOregon
Coordinates44.4772, -123.3236
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating52.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length137 ft (41.8 m)
Longest span69 ft (20.9 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic437 (2020)
Projected traffic583 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Llewellyn Road over Muddy Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is Llewellyn Road over Muddy Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does Llewellyn Road over Muddy Creek carry?

About 437 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Llewellyn Road over Muddy Creek?

The structure is 137 ft (41.8 m) long with a longest span of 69 ft (20.9 m) and a deck 36 ft wide.

Who owns Llewellyn Road over Muddy Creek?

It is owned by the County Highway Agency.