US Bridges

FAS A-396 over Coos City/Isthmus Slough

Fair

Coos County, Oregon · 002 MI E FAP 2 JCT · Structure no. 19663 000 00016

Built
2006
19 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
712 ft
4 main spans
Daily traffic
2,797
2020 count
Owner
County
County Highway Agency

About this bridge

FAS A-396 over Coos City/Isthmus Slough is a prestressed concrete continuous box beam or girders - multiple carrying FAS A-396 over Coos City/Isthmus Slough in Coos County, Oregon. It was built in 2006, so it is 19 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 2,797 vehicles a day, roughly 25% of them trucks, projected to reach 3,162 by 2025. The structure is 712 ft (217.1 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFAS A-396
CrossesCoos City/Isthmus Slough
Location002 MI E FAP 2 JCT
RouteCounty Highway 0A396
CountyCoos County
StateOregon
Coordinates43.30086, -124.20886
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 protection7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length712 ft (217.1 m)
Longest span199 ft (60.6 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,797 (2020)
Projected traffic3,162 by 2025
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was FAS A-396 over Coos City/Isthmus Slough built?

It was built in 2006, making it 19 years old in 2025.

What condition is FAS A-396 over Coos City/Isthmus 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 FAS A-396 over Coos City/Isthmus Slough carry?

About 2,797 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is FAS A-396 over Coos City/Isthmus Slough?

The structure is 712 ft (217.1 m) long with a longest span of 199 ft (60.6 m) and a deck 34 ft wide.

Who owns FAS A-396 over Coos City/Isthmus Slough?

It is owned by the County Highway Agency.