US Bridges

SR 340 Bridge ST over Walker Rvr

Good

Lyon County, Nevada · Yerington · Structure no. B1408

Built
1974
51 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
134 ft
1 main span
Daily traffic
3,100
2017 count
Owner
State
State Highway Agency

About this bridge

SR 340 Bridge ST over Walker Rvr is a prestressed concrete box beam or girders - multiple carrying SR 340 Bridge ST over Walker Rvr in Lyon County, Nevada. It was built in 1974, so it is 51 years old, older than the Nevada average of 36.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,100 vehicles a day, roughly 4% of them trucks, projected to reach 7,694 by 2040. The structure is 134 ft (40.8 m) long and 48 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 340 Bridge ST
CrossesWalker Rvr
LocationYerington
RouteState Highway 340
CountyLyon County
StateNevada
Coordinates38.98319, -119.18234
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than 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 rating110.1 US tons
Inventory rating61.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length134 ft (40.8 m)
Longest span132 ft (40.2 m)
Deck width48 ft (14.6 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2017)
Projected traffic7,694 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 340 Bridge ST over Walker Rvr built?

It was built in 1974, making it 51 years old in 2025.

What condition is SR 340 Bridge ST over Walker Rvr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does SR 340 Bridge ST over Walker Rvr carry?

About 3,100 vehicles per day (2017 count), of which roughly 4% are trucks.

How long is SR 340 Bridge ST over Walker Rvr?

The structure is 134 ft (40.8 m) long with a longest span of 132 ft (40.2 m) and a deck 48 ft wide.

Who owns SR 340 Bridge ST over Walker Rvr?

It is owned by the State Highway Agency.