US Bridges

IRR BIA RTE 9 over Owyhee River

Fair

Elko County, Nevada · 7.3 KM SE to Owyhee · Structure no. 00000000000H305

Built
1975
50 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
76 ft
3 main spans
Daily traffic
300
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 9 over Owyhee River is a concrete stringer/multi-beam or girder carrying IRR BIA RTE 9 over Owyhee River in Elko County, Nevada. It was built in 1975, so it is 50 years old, older than the Nevada average of 36.4 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 300 vehicles a day, roughly 12% of them trucks, projected to reach 350 by 2044. The structure is 76 ft (23.2 m) long and 31 ft wide. If it were closed, the detour would be 9.3 mi (15 km).

CarriesIRR BIA RTE 9
CrossesOwyhee River
Location7.3 KM SE to Owyhee
RouteFederal Lands Road 9
StateNevada
Coordinates41.98789, -116.14494
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating34.2 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span25 ft (7.6 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2024)
Projected traffic350 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.3 mi (15 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE 9 over Owyhee River built?

It was built in 1975, making it 50 years old in 2025.

What condition is IRR BIA RTE 9 over Owyhee 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 October 2024.

How much traffic does IRR BIA RTE 9 over Owyhee River carry?

About 300 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is IRR BIA RTE 9 over Owyhee River?

The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 31 ft wide.

Who owns IRR BIA RTE 9 over Owyhee River?

It is owned by the Bureau of Indian Affairs.