US Bridges

Griffin Lp(north) over W.Br.Little Wood River

Fair

Blaine County, Idaho · 1.6 S. 0.2 E. Carey · Structure no. 000000000023685

Built
1959
66 years old, rebuilt 2007
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
30
2023 count
Owner
County
County Highway Agency

About this bridge

Griffin Lp(north) over W.Br.Little Wood River is a steel stringer/multi-beam or girder carrying Griffin Lp(north) over W.Br.Little Wood River in Blaine County, Idaho. It was built in 1959 and reconstructed in 2007, so it is 66 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 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 30 vehicles a day, roughly 50% of them trucks, projected to reach 45 by 2042. The structure is 24 ft (7.3 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesGriffin Lp(north)
CrossesW.Br.Little Wood River
Location1.6 S. 0.2 E. Carey
RouteCounty Highway 0
CountyBlaine County
StateIdaho
Coordinates43.28747, -113.9415
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 15
Structure length24 ft (7.3 m)
Longest span22 ft (6.8 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic45 by 2042
Trucks50%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Griffin Lp(north) over W.Br.Little Wood River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2007.

What condition is Griffin Lp(north) over W.Br.Little 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 September 2023.

How much traffic does Griffin Lp(north) over W.Br.Little Wood River carry?

About 30 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is Griffin Lp(north) over W.Br.Little Wood River?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.8 m) and a deck 20 ft wide.

Who owns Griffin Lp(north) over W.Br.Little Wood River?

It is owned by the County Highway Agency.