US Bridges

IRR Cordero Mine R over Oregon Cyn Crk

Fair

Humboldt County, Nevada · West of Mcdermitt · Structure no. B 695

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
20
2017 count
Owner
State
State Highway Agency

About this bridge

IRR Cordero Mine R over Oregon Cyn Crk is a concrete culvert carrying IRR Cordero Mine R over Oregon Cyn Crk in Humboldt County, Nevada. It was built in 1957, so it is 68 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 20 vehicles a day, roughly 13% of them trucks, projected to reach 22 by 2040. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 77.1 mi (124 km).

CarriesIRR Cordero Mine R
CrossesOregon Cyn Crk
LocationWest of Mcdermitt
RouteState Highway 793
StateNevada
Coordinates41.9983, -117.73768
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2017)
Projected traffic22 by 2040
Trucks13%
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 IRR Cordero Mine R over Oregon Cyn Crk built?

It was built in 1957, making it 68 years old in 2025.

What condition is IRR Cordero Mine R over Oregon Cyn Crk 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 IRR Cordero Mine R over Oregon Cyn Crk carry?

About 20 vehicles per day (2017 count), of which roughly 13% are trucks.

How long is IRR Cordero Mine R over Oregon Cyn Crk?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns IRR Cordero Mine R over Oregon Cyn Crk?

It is owned by the State Highway Agency.