US Bridges

County RD 45 over Kentuck Slough

Fair

Coos County, Oregon · 2.7 Miles EASTHIGHWAY101 · Structure no. 20356 045 00266

Built
2007
18 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
2,766
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 45 over Kentuck Slough is a prestressed concrete slab carrying County RD 45 over Kentuck Slough in Coos County, Oregon. It was built in 2007, so it is 18 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 6 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 2,766 vehicles a day, roughly 10% of them trucks, projected to reach 3,126 by 2025. The structure is 41 ft (12.4 m) long and 52 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesCounty RD 45
CrossesKentuck Slough
Location2.7 Miles EASTHIGHWAY101
RouteCounty Highway 0A433
CountyCoos County
StateOregon
Coordinates43.42213, -124.18858
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating56.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length41 ft (12.4 m)
Longest span40 ft (12.1 m)
Deck width52 ft (15.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,766 (2020)
Projected traffic3,126 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 County RD 45 over Kentuck Slough built?

It was built in 2007, making it 18 years old in 2025.

What condition is County RD 45 over Kentuck Slough 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 September 2024.

How much traffic does County RD 45 over Kentuck Slough carry?

About 2,766 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County RD 45 over Kentuck Slough?

The structure is 41 ft (12.4 m) long with a longest span of 40 ft (12.1 m) and a deck 52 ft wide.

Who owns County RD 45 over Kentuck Slough?

It is owned by the County Highway Agency.