US Bridges

2700 N over Big Lost River

Fair

Butte County, Idaho · 2.1 N. 3.3 W. Arco · Structure no. 000000000031500

Built
1984
41 years old, rebuilt 1990
Condition
Fair
inspected July 2023
Type
Tee Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

2700 N over Big Lost River is a prestressed concrete tee beam carrying 2700 N over Big Lost River in Butte County, Idaho. It was built in 1984 and reconstructed in 1990, so it is 41 years old, younger than the Idaho average of 45.3 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 110 vehicles a day, roughly 22% of them trucks, projected to reach 165 by 2042. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries2700 N
CrossesBig Lost River
Location2.1 N. 3.3 W. Arco
RouteCounty Highway 0
StateIdaho
Coordinates43.66728, -113.36525
Functional classRural Local

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.
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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating52.6 US tons
Inventory rating37.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic165 by 2042
Trucks22%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 2700 N over Big Lost River built?

It was built in 1984, making it 41 years old in 2025. It was reconstructed in 1990.

What condition is 2700 N over Big Lost River 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 2023.

How much traffic does 2700 N over Big Lost River carry?

About 110 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is 2700 N over Big Lost River?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns 2700 N over Big Lost River?

It is owned by the County Highway Agency.