US Bridges

IRR BIA 12 over Irrigation Canal

Fair

Elko County, Nevada · 2.6 KM SW of Owyhee · Structure no. 0000H64641B0325

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
23 ft
3 main spans
Daily traffic
100
2024 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA 12 over Irrigation Canal is a steel culvert carrying IRR BIA 12 over Irrigation Canal in Elko County, Nevada. It was built in 1970, so it is 55 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 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2044. The structure is 23 ft (6.9 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesIRR BIA 12
CrossesIrrigation Canal
Location2.6 KM SW of Owyhee
RouteFederal Lands Road 12
StateNevada
Coordinates41.92594, -116.11203
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.7 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 25 or greater
Structure length23 ft (6.9 m)
Longest span6 ft (1.8 m)
Deck width47 ft (14.2 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic120 by 2044
Trucks10%
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

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 12 over Irrigation Canal built?

It was built in 1970, making it 55 years old in 2025.

What condition is IRR BIA 12 over Irrigation Canal 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 12 over Irrigation Canal carry?

About 100 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is IRR BIA 12 over Irrigation Canal?

The structure is 23 ft (6.9 m) long with a longest span of 6 ft (1.8 m) and a deck 47 ft wide.

Who owns IRR BIA 12 over Irrigation Canal?

It is owned by the Bureau of Indian Affairs.