US Bridges

I 15N over SR591 Spring Mtn RD

Fair

Clark County, Nevada · Las Vegas · Structure no. I 806N

Built
1994
31 years old
Condition
Fair
inspected January 2021
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
231 ft
2 main spans
Daily traffic
121,500
2021 count
Owner
State
State Highway Agency

About this bridge

I 15N over SR591 Spring Mtn RD is a prestressed concrete continuous box beam or girders - multiple carrying I 15N over SR591 Spring Mtn RD in Clark County, Nevada. It was built in 1994, so it is 31 years old, younger 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 121,500 vehicles a day, roughly 6% of them trucks, projected to reach 329,000 by 2040. The structure is 231 ft (70.4 m) long and 85 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 15N
CrossesSR591 Spring Mtn RD
LocationLas Vegas
RouteInterstate 15
CountyClark County
StateNevada
Coordinates36.12618, -115.18039
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating59.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length231 ft (70.4 m)
Longest span120 ft (36.6 m)
Deck width85 ft (25.9 m)
Roadway width79 ft (24.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic121,500 (2021)
Projected traffic329,000 by 2040
Trucks6%
Lanes on structure6
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.6 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 15N over SR591 Spring Mtn RD built?

It was built in 1994, making it 31 years old in 2025.

What condition is I 15N over SR591 Spring Mtn RD 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 2021.

How much traffic does I 15N over SR591 Spring Mtn RD carry?

About 121,500 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I 15N over SR591 Spring Mtn RD?

The structure is 231 ft (70.4 m) long with a longest span of 120 ft (36.6 m) and a deck 85 ft wide.

Who owns I 15N over SR591 Spring Mtn RD?

It is owned by the State Highway Agency.