US Bridges

I 15N over SR604 Las Vegas Bl

Good

Clark County, Nevada · North Las Vegas · Structure no. I 969N

Built
1963
62 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
132 ft
3 main spans
Daily traffic
17,000
2021 count
Owner
State
State Highway Agency

About this bridge

I 15N over SR604 Las Vegas Bl is a concrete continuous box beam or girders - multiple carrying I 15N over SR604 Las Vegas Bl in Clark County, Nevada. It was built in 1963, so it is 62 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 17,000 vehicles a day, roughly 25% of them trucks, projected to reach 14,000 by 2040. The structure is 132 ft (40.2 m) long and 63 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 15N
CrossesSR604 Las Vegas Bl
LocationNorth Las Vegas
RouteInterstate 15
StateNevada
Coordinates36.30989, -114.95271
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.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating38.5 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length132 ft (40.2 m)
Longest span51 ft (15.5 m)
Deck width63 ft (19.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,000 (2021)
Projected traffic14,000 by 2040
Trucks25%
Lanes on structure3
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 SR604 Las Vegas Bl built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 15N over SR604 Las Vegas Bl 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 October 2024.

How much traffic does I 15N over SR604 Las Vegas Bl carry?

About 17,000 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I 15N over SR604 Las Vegas Bl?

The structure is 132 ft (40.2 m) long with a longest span of 51 ft (15.5 m) and a deck 63 ft wide.

Who owns I 15N over SR604 Las Vegas Bl?

It is owned by the State Highway Agency.