US Bridges

County RD 5A over Stringtown Oflow

Fair

Coos County, Oregon · 128 MI S FAS 815 JCT · Structure no. 20129 000 01280

Built
2008
17 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
610 ft
6 main spans
Daily traffic
2,060
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 5A over Stringtown Oflow is a prestressed concrete continuous box beam or girders - single or spread carrying County RD 5A over Stringtown Oflow in Coos County, Oregon. It was built in 2008, so it is 17 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 2,060 vehicles a day, roughly 10% of them trucks, projected to reach 2,280 by 2025. The structure is 610 ft (185.9 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty RD 5A
CrossesStringtown Oflow
Location128 MI S FAS 815 JCT
RouteCounty Highway 0A417
CountyCoos County
StateOregon
Coordinates43.06651, -124.15173
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.9 US tons
Inventory rating76.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length610 ft (185.9 m)
Longest span110 ft (33.5 m)
Deck width44 ft (13.4 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,060 (2020)
Projected traffic2,280 by 2025
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 5A over Stringtown Oflow built?

It was built in 2008, making it 17 years old in 2025.

What condition is County RD 5A over Stringtown Oflow 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 5A over Stringtown Oflow carry?

About 2,060 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is County RD 5A over Stringtown Oflow?

The structure is 610 ft (185.9 m) long with a longest span of 110 ft (33.5 m) and a deck 44 ft wide.

Who owns County RD 5A over Stringtown Oflow?

It is owned by the County Highway Agency.