US Bridges

SR 278 Eureka-Carl over Humboldt Rvr

Fair

Elko County, Nevada · Carlin · Structure no. B 581

Built
1954
71 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
205 ft
5 main spans
Daily traffic
480
2017 count
Owner
State
State Highway Agency

About this bridge

SR 278 Eureka-Carl over Humboldt Rvr is a concrete continuous tee beam carrying SR 278 Eureka-Carl over Humboldt Rvr in Elko County, Nevada. It was built in 1954, so it is 71 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 480 vehicles a day, roughly 25% of them trucks, projected to reach 530 by 2040. The structure is 205 ft (62.5 m) long and 30 ft wide. If it were closed, the detour would be 77.1 mi (124 km).

Location

Open in Google Maps
CarriesSR 278 Eureka-Carl
CrossesHumboldt Rvr
LocationCarlin
RouteState Highway 278
CountyElko County
StateNevada
Coordinates40.69997, -116.12972
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating32 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length205 ft (62.5 m)
Longest span61 ft (18.6 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic480 (2017)
Projected traffic530 by 2040
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed77.1 mi (124 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 SR 278 Eureka-Carl over Humboldt Rvr built?

It was built in 1954, making it 71 years old in 2025.

What condition is SR 278 Eureka-Carl over Humboldt Rvr 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 July 2023.

How much traffic does SR 278 Eureka-Carl over Humboldt Rvr carry?

About 480 vehicles per day (2017 count), of which roughly 25% are trucks.

How long is SR 278 Eureka-Carl over Humboldt Rvr?

The structure is 205 ft (62.5 m) long with a longest span of 61 ft (18.6 m) and a deck 30 ft wide.

Who owns SR 278 Eureka-Carl over Humboldt Rvr?

It is owned by the State Highway Agency.