US Bridges

Decatur Bl over Flamingo Wash

Fair

Clark County, Nevada · Las Vegas · Structure no. B1559

Built
1977
48 years old
Condition
Fair
inspected January 2021
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
34,000
2021 count
Owner
County
County Highway Agency

About this bridge

Decatur Bl over Flamingo Wash is a concrete culvert carrying Decatur Bl over Flamingo Wash in Clark County, Nevada. It was built in 1977, so it is 48 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 34,000 vehicles a day, roughly 2% of them trucks, projected to reach 78,588 by 2040. The structure is 38 ft (11.6 m) long and 115 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDecatur Bl
CrossesFlamingo Wash
LocationLas Vegas
RouteCity Street 597
CountyClark County
StateNevada
Coordinates36.1023, -115.20797
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width115 ft (35.2 m)
Roadway width109 ft (33.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,000 (2021)
Projected traffic78,588 by 2040
Trucks2%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Decatur Bl over Flamingo Wash built?

It was built in 1977, making it 48 years old in 2025.

What condition is Decatur Bl over Flamingo 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 Decatur Bl over Flamingo Wash carry?

About 34,000 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Decatur Bl over Flamingo Wash?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 115 ft wide.

Who owns Decatur Bl over Flamingo Wash?

It is owned by the County Highway Agency.