US Bridges

Old SR 8A over Quinn Rvr

Fair

Humboldt County, Nevada · South of Denio · Structure no. B 364

Built
1980
45 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
45
2017 count
Owner
County
County Highway Agency

About this bridge

Old SR 8A over Quinn Rvr is a concrete culvert carrying Old SR 8A over Quinn Rvr in Humboldt County, Nevada. It was built in 1980, so it is 45 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 45 vehicles a day, projected to reach 50 by 2040. The structure is 33 ft (10.1 m) long and 26 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesOld SR 8A
CrossesQuinn Rvr
LocationSouth of Denio
RouteCounty Highway 0
CountyHumboldt County
StateNevada
Coordinates41.57491, -118.43479
Functional classRural Local

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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating30.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2017)
Projected traffic50 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Old SR 8A over Quinn Rvr built?

It was built in 1980, making it 45 years old in 2025.

What condition is Old SR 8A over Quinn 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 Old SR 8A over Quinn Rvr carry?

About 45 vehicles per day (2017 count).

How long is Old SR 8A over Quinn Rvr?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns Old SR 8A over Quinn Rvr?

It is owned by the County Highway Agency.