US Bridges

Burmah Road over Big Wood River

Fair

Lincoln County, Idaho · 4.2 N. 8.1 W. Richfield · Structure no. 000000000025060

Built
1978
47 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
230
2023 count
Owner
Local
Other Local Agency

About this bridge

Burmah Road over Big Wood River is a prestressed concrete tee beam carrying Burmah Road over Big Wood River in Lincoln County, Idaho. It was built in 1978, so it is 47 years old, older 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 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 230 vehicles a day, roughly 10% of them trucks, projected to reach 345 by 2042. The structure is 65 ft (19.8 m) long and 30 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

Open in Google Maps
CarriesBurmah Road
CrossesBig Wood River
Location4.2 N. 8.1 W. Richfield
RouteCounty Highway 0
CountyLincoln County
StateIdaho
Coordinates43.15147, -114.31614
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating67 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span64 ft (19.5 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic230 (2023)
Projected traffic345 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local 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 Burmah Road over Big Wood River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Burmah Road over Big Wood 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 March 2024.

How much traffic does Burmah Road over Big Wood River carry?

About 230 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Burmah Road over Big Wood River?

The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.5 m) and a deck 30 ft wide.

Who owns Burmah Road over Big Wood River?

It is owned by the Other Local Agency.