US Bridges

I 15 over Dry Wash

Fair

Clark County, Nevada · South of Las Vegas · Structure no. B 729

Built
1961
64 years old, rebuilt 1980
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
52 ft
4 main spans
Daily traffic
151,000
2021 count
Owner
State
State Highway Agency

About this bridge

I 15 over Dry Wash is a concrete culvert carrying I 15 over Dry Wash in Clark County, Nevada. It was built in 1961 and reconstructed in 1980, so it is 64 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 151,000 vehicles a day, roughly 22% of them trucks, projected to reach 289,536 by 2040. The structure is 52 ft (15.8 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 15
CrossesDry Wash
LocationSouth of Las Vegas
RouteInterstate 15
CountyClark County
StateNevada
Coordinates36.04107, -115.18059
Functional classRural Principal Arterial - Interstate

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 inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating32.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length52 ft (15.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic151,000 (2021)
Projected traffic289,536 by 2040
Trucks22%
Lanes on structure14
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$610,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 15 over Dry Wash built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1980.

What condition is I 15 over Dry Wash 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 January 2023.

How much traffic does I 15 over Dry Wash carry?

About 151,000 vehicles per day (2021 count), of which roughly 22% are trucks.

How long is I 15 over Dry Wash?

The structure is 52 ft (15.8 m) long with a longest span of 12 ft (3.7 m).

Who owns I 15 over Dry Wash?

It is owned by the State Highway Agency.