US Bridges

SR 208 Topaz RD over W Walker Rvr Wilson C

Fair

Lyon County, Nevada · East of Smith · Structure no. B 778

Built
1959
66 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
1,500
2017 count
Owner
State
State Highway Agency

About this bridge

SR 208 Topaz RD over W Walker Rvr Wilson C is a concrete continuous slab carrying SR 208 Topaz RD over W Walker Rvr Wilson C in Lyon County, Nevada. It was built in 1959, so it is 66 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 1,500 vehicles a day, roughly 11% of them trucks, projected to reach 2,500 by 2040. The structure is 123 ft (37.5 m) long and 37 ft wide. If it were closed, the detour would be 77.1 mi (124 km).

Location

Open in Google Maps
CarriesSR 208 Topaz RD
CrossesW Walker Rvr Wilson C
LocationEast of Smith
RouteState Highway 208
CountyLyon County
StateNevada
Coordinates38.80909, -119.22122
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 inspectionApril 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 rating86.6 US tons
Inventory rating51.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span48 ft (14.6 m)
Deck width37 ft (11.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2017)
Projected traffic2,500 by 2040
Trucks11%
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 208 Topaz RD over W Walker Rvr Wilson C built?

It was built in 1959, making it 66 years old in 2025.

What condition is SR 208 Topaz RD over W Walker Rvr Wilson C 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 208 Topaz RD over W Walker Rvr Wilson C carry?

About 1,500 vehicles per day (2017 count), of which roughly 11% are trucks.

How long is SR 208 Topaz RD over W Walker Rvr Wilson C?

The structure is 123 ft (37.5 m) long with a longest span of 48 ft (14.6 m) and a deck 37 ft wide.

Who owns SR 208 Topaz RD over W Walker Rvr Wilson C?

It is owned by the State Highway Agency.