US Bridges

Harbor Island RD over Tropicana Wash

Fair

Clark County, Nevada · Las Vegas · Structure no. B1866

Built
1988
37 years old
Condition
Fair
inspected January 2021
Type
Culvert
Concrete
Length
51 ft
4 main spans
Daily traffic
37,000
2017 count
Owner
Private
Private (other than railroad)

About this bridge

Harbor Island RD over Tropicana Wash is a concrete culvert carrying Harbor Island RD over Tropicana Wash in Clark County, Nevada. It was built in 1988, so it is 37 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 37,000 vehicles a day, roughly 1% of them trucks, projected to reach 76,520 by 2040. The structure is 51 ft (15.5 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesHarbor Island RD
CrossesTropicana Wash
LocationLas Vegas
CountyClark County
StateNevada
Coordinates36.10831, -115.15827
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating43.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span12 ft (3.7 m)
Deck width34 ft (10.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,000 (2017)
Projected traffic76,520 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerPrivate (other than railroad)
Maintained byPrivate (other than railroad)
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$288,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Harbor Island RD over Tropicana Wash built?

It was built in 1988, making it 37 years old in 2025.

What condition is Harbor Island RD over Tropicana Wash 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 Harbor Island RD over Tropicana Wash carry?

About 37,000 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is Harbor Island RD over Tropicana Wash?

The structure is 51 ft (15.5 m) long with a longest span of 12 ft (3.7 m) and a deck 34 ft wide.

Who owns Harbor Island RD over Tropicana Wash?

It is owned by the Private (other than railroad).