US Bridges

SR 338/SWEETWATER over Dalzell Canyon

Fair

Lyon County, Nevada · South of Wellington · Structure no. B 511

Built
1947
78 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
400
2017 count
Owner
State
State Highway Agency

About this bridge

SR 338/SWEETWATER over Dalzell Canyon is a concrete culvert carrying SR 338/SWEETWATER over Dalzell Canyon in Lyon County, Nevada. It was built in 1947, so it is 78 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 400 vehicles a day, roughly 6% of them trucks, projected to reach 993 by 2040. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 77.1 mi (124 km).

Location

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CarriesSR 338/SWEETWATER
CrossesDalzell Canyon
LocationSouth of Wellington
RouteState Highway 338
CountyLyon County
StateNevada
Coordinates38.63247, -119.2617
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: 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 rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length30 ft (9.1 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 traffic400 (2017)
Projected traffic993 by 2040
Trucks6%
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 338/SWEETWATER over Dalzell Canyon built?

It was built in 1947, making it 78 years old in 2025.

What condition is SR 338/SWEETWATER over Dalzell Canyon 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 338/SWEETWATER over Dalzell Canyon carry?

About 400 vehicles per day (2017 count), of which roughly 6% are trucks.

How long is SR 338/SWEETWATER over Dalzell Canyon?

The structure is 30 ft (9.1 m) long with a longest span of 10 ft (3 m).

Who owns SR 338/SWEETWATER over Dalzell Canyon?

It is owned by the State Highway Agency.