US Bridges

I 15N over Sandhill

Fair

Clark County, Nevada · Mesquite · Structure no. I 978N

Built
1973
52 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
122 ft
3 main spans
Daily traffic
15,500
2021 count
Owner
State
State Highway Agency

About this bridge

I 15N over Sandhill is a concrete continuous box beam or girders - single or spread carrying I 15N over Sandhill 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 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 15,500 vehicles a day, roughly 29% of them trucks, projected to reach 22,749 by 2040. The structure is 122 ft (37.3 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 15N
CrossesSandhill
LocationMesquite
RouteInterstate 15
StateNevada
Coordinates36.81253, -114.06419
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating57.2 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length122 ft (37.3 m)
Longest span60 ft (18.3 m)
Deck width44 ft (13.5 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2021)
Projected traffic22,749 by 2040
Trucks29%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 15N over Sandhill built?

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

What condition is I 15N over Sandhill 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 15N over Sandhill carry?

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

How long is I 15N over Sandhill?

The structure is 122 ft (37.3 m) long with a longest span of 60 ft (18.3 m) and a deck 44 ft wide.

Who owns I 15N over Sandhill?

It is owned by the State Highway Agency.