US Bridges

I 15 over Town Wash

Good

Clark County, Nevada · NE of Mesquite · Structure no. B 977N

Built
1973
52 years old
Condition
Good
inspected November 2024
Type
Box Beam or Girders - Single or Spread
Concrete
Length
70 ft
1 main span
Daily traffic
15,500
2021 count
Owner
State
State Highway Agency

About this bridge

I 15 over Town Wash is a concrete box beam or girders - single or spread carrying I 15 over Town Wash in Clark County, Nevada. It was built in 1973, so it is 52 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 15,500 vehicles a day, roughly 29% of them trucks, projected to reach 19,751 by 2040. The structure is 70 ft (21.3 m) long and 50 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 15
CrossesTown Wash
LocationNE of Mesquite
RouteInterstate 15
StateNevada
Coordinates36.81077, -114.06789
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating44.6 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span68 ft (20.7 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2021)
Projected traffic19,751 by 2040
Trucks29%
Lanes on structure3
Traffic directionOne-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 15 over Town Wash built?

It was built in 1973, making it 52 years old in 2025.

What condition is I 15 over Town Wash 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 November 2024.

How much traffic does I 15 over Town Wash carry?

About 15,500 vehicles per day (2021 count), of which roughly 29% are trucks.

How long is I 15 over Town Wash?

The structure is 70 ft (21.3 m) long with a longest span of 68 ft (20.7 m) and a deck 50 ft wide.

Who owns I 15 over Town Wash?

It is owned by the State Highway Agency.