US Bridges

Riggs Road over Wash

Good

Maricopa County, Arizona · 0.25 MI W of Hawes RD · Structure no. 11578

Built
2019
6 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
7,098
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Riggs Road over Wash is a concrete continuous culvert carrying Riggs Road over Wash in Maricopa County, Arizona. It was built in 2019, so it is 6 years old, younger than the Arizona average of 47.8 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 7,098 vehicles a day, roughly 5% of them trucks, projected to reach 8,008 by 2038. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRiggs Road
CrossesWash
Location0.25 MI W of Hawes RD
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.2195, -111.6559
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.9 US tons
Inventory rating62.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,098 (2018)
Projected traffic8,008 by 2038
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Riggs Road over Wash built?

It was built in 2019, making it 6 years old in 2025.

What condition is Riggs Road over Wash 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 January 2024.

How much traffic does Riggs Road over Wash carry?

About 7,098 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Riggs Road over Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Riggs Road over Wash?

It is owned by the Town or Township Highway Agency.