US Bridges

I 15S over Toquop Wash

Fair

Clark County, Nevada · West of Mesquite · Structure no. B 571S

Built
1965
60 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
244 ft
5 main spans
Daily traffic
12,400
2021 count
Owner
State
State Highway Agency

About this bridge

I 15S over Toquop Wash is a concrete continuous tee beam carrying I 15S over Toquop Wash in Clark County, Nevada. It was built in 1965, so it is 60 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 12,400 vehicles a day, roughly 25% of them trucks, projected to reach 21,715 by 2040. The structure is 244 ft (74.4 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 15S
CrossesToquop Wash
LocationWest of Mesquite
RouteInterstate 15
StateNevada
Coordinates36.76512, -114.18701
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating27.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length244 ft (74.4 m)
Longest span68 ft (20.7 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,400 (2021)
Projected traffic21,715 by 2040
Trucks25%
Lanes on structure2
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 15S over Toquop Wash built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 15S over Toquop 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 November 2024.

How much traffic does I 15S over Toquop Wash carry?

About 12,400 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I 15S over Toquop Wash?

The structure is 244 ft (74.4 m) long with a longest span of 68 ft (20.7 m) and a deck 42 ft wide.

Who owns I 15S over Toquop Wash?

It is owned by the State Highway Agency.