US Bridges

Stc 6876;HAYDEN CR over Hayden Creek

FairPosted for load

Lemhi County, Idaho · 2 W. 0.8 S. Lemhi · Structure no. 000000000021180

Built
1960
65 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
33 ft
1 main span
Daily traffic
130
2023 count
Owner
County
County Highway Agency

About this bridge

Stc 6876;HAYDEN CR over Hayden Creek is a concrete stringer/multi-beam or girder carrying Stc 6876;HAYDEN CR over Hayden Creek in Lemhi County, Idaho. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 130 vehicles a day, roughly 18% of them trucks, projected to reach 195 by 2042. The structure is 33 ft (10.1 m) long and 29 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesStc 6876;HAYDEN CR
CrossesHayden Creek
Location2 W. 0.8 S. Lemhi
RouteCounty Highway 6876
CountyLemhi County
StateIdaho
Coordinates44.83939, -113.66075
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment7: Better than present minimum criteria
Operating rating29 US tons
Inventory rating17 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length33 ft (10.1 m)
Longest span32 ft (9.8 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2023)
Projected traffic195 by 2042
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$381,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Stc 6876;HAYDEN CR over Hayden Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Stc 6876;HAYDEN CR over Hayden Creek 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 April 2023.

How much traffic does Stc 6876;HAYDEN CR over Hayden Creek carry?

About 130 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Stc 6876;HAYDEN CR over Hayden Creek?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 29 ft wide.

Who owns Stc 6876;HAYDEN CR over Hayden Creek?

It is owned by the County Highway Agency.