US Bridges

SR 822 Dayton Vly over Carson Rvr

Fair

Lyon County, Nevada · Dayton · Structure no. B 637

Built
1956
69 years old, rebuilt 1991
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
213 ft
3 main spans
Daily traffic
11,200
2021 count
Owner
State
State Highway Agency

About this bridge

SR 822 Dayton Vly over Carson Rvr is a concrete box beam or girders - multiple carrying SR 822 Dayton Vly over Carson Rvr in Lyon County, Nevada. It was built in 1956 and reconstructed in 1991, so it is 69 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 11,200 vehicles a day, roughly 15% of them trucks, projected to reach 16,000 by 2040. The structure is 213 ft (64.9 m) long and 69 ft wide. If it were closed, the detour would be 77.1 mi (124 km).

Location

Open in Google Maps
CarriesSR 822 Dayton Vly
CrossesCarson Rvr
LocationDayton
RouteState Highway 822
CountyLyon County
StateNevada
Coordinates39.23679, -119.58782
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
Deck7 GoodSome minor problems.
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.4 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length213 ft (64.9 m)
Longest span87 ft (26.5 m)
Deck width69 ft (20.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,200 (2021)
Projected traffic16,000 by 2040
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 822 Dayton Vly over Carson Rvr built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1991.

What condition is SR 822 Dayton Vly over Carson 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 April 2023.

How much traffic does SR 822 Dayton Vly over Carson Rvr carry?

About 11,200 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is SR 822 Dayton Vly over Carson Rvr?

The structure is 213 ft (64.9 m) long with a longest span of 87 ft (26.5 m) and a deck 69 ft wide.

Who owns SR 822 Dayton Vly over Carson Rvr?

It is owned by the State Highway Agency.