US Bridges

Interstate 11 over Silverline Road

Good

Clark County, Nevada · Outside of Boulder City · Structure no. H2955S

Built
2017
8 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
73 ft
1 main span
Daily traffic
8,550
2021 count
Owner
State
State Highway Agency

About this bridge

Interstate 11 over Silverline Road is a steel stringer/multi-beam or girder carrying Interstate 11 over Silverline Road in Clark County, Nevada. It was built in 2017, so it is 8 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 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 8,550 vehicles a day, projected to reach 105,474 by 2040. The structure is 73 ft (22.3 m) long and 56 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesInterstate 11
CrossesSilverline Road
LocationOutside of Boulder City
RouteInterstate 11
CountyClark County
StateNevada
Coordinates35.95766, -114.90952
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length73 ft (22.3 m)
Longest span71 ft (21.6 m)
Deck width56 ft (17.1 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,550 (2021)
Projected traffic105,474 by 2040
Trucks—
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 Interstate 11 over Silverline Road built?

It was built in 2017, making it 8 years old in 2025.

What condition is Interstate 11 over Silverline 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 September 2021.

How much traffic does Interstate 11 over Silverline Road carry?

About 8,550 vehicles per day (2021 count).

How long is Interstate 11 over Silverline Road?

The structure is 73 ft (22.3 m) long with a longest span of 71 ft (21.6 m) and a deck 56 ft wide.

Who owns Interstate 11 over Silverline Road?

It is owned by the State Highway Agency.