US Bridges

Riggs RD over Sonoqui Wash

Good

Maricopa County, Arizona · 0.2 MI E of Hawes RD · Structure no. 11108

Built
2012
13 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
191 ft
2 main spans
Daily traffic
7,108
2023 count
Owner
County
County Highway Agency

About this bridge

Riggs RD over Sonoqui Wash is a prestressed concrete continuous stringer/multi-beam or girder carrying Riggs RD over Sonoqui Wash in Maricopa County, Arizona. It was built in 2012, so it is 13 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 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 7,108 vehicles a day, roughly 5% of them trucks, projected to reach 7,118 by 2042. The structure is 191 ft (58.2 m) long and 87 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRiggs RD
CrossesSonoqui Wash
Location0.2 MI E of Hawes RD
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.2196, -111.6484
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length191 ft (58.2 m)
Longest span92 ft (28 m)
Deck width87 ft (26.4 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,108 (2023)
Projected traffic7,118 by 2042
Trucks5%
Lanes on structure4
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 Riggs RD over Sonoqui Wash built?

It was built in 2012, making it 13 years old in 2025.

What condition is Riggs RD over Sonoqui 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 November 2023.

How much traffic does Riggs RD over Sonoqui Wash carry?

About 7,108 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Riggs RD over Sonoqui Wash?

The structure is 191 ft (58.2 m) long with a longest span of 92 ft (28 m) and a deck 87 ft wide.

Who owns Riggs RD over Sonoqui Wash?

It is owned by the County Highway Agency.