US Bridges

I 15S Off Ramp over SR 579 Bonanza Road

Good

Clark County, Nevada · Las Vegas · Structure no. H 942L

Built
2010
15 years old
Condition
Good
inspected February 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
171 ft
1 main span
Daily traffic
13,900
2017 count
Owner
State
State Highway Agency

About this bridge

I 15S Off Ramp over SR 579 Bonanza Road is a prestressed concrete box beam or girders - single or spread carrying I 15S Off Ramp over SR 579 Bonanza Road in Clark County, Nevada. It was built in 2010, so it is 15 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,900 vehicles a day, roughly 3% of them trucks, projected to reach 28,747 by 2040. The structure is 171 ft (52 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 15S Off Ramp
CrossesSR 579 Bonanza Road
LocationLas Vegas
RouteInterstate 15
CountyClark County
StateNevada
Coordinates36.17722, -115.15173
Functional classUrban 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating66.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length171 ft (52 m)
Longest span167 ft (50.9 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,900 (2017)
Projected traffic28,747 by 2040
Trucks3%
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 15S Off Ramp over SR 579 Bonanza Road built?

It was built in 2010, making it 15 years old in 2025.

What condition is I 15S Off Ramp over SR 579 Bonanza Road 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 February 2024.

How much traffic does I 15S Off Ramp over SR 579 Bonanza Road carry?

About 13,900 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is I 15S Off Ramp over SR 579 Bonanza Road?

The structure is 171 ft (52 m) long with a longest span of 167 ft (50.9 m) and a deck 41 ft wide.

Who owns I 15S Off Ramp over SR 579 Bonanza Road?

It is owned by the State Highway Agency.