US Bridges

IRR Riggs Road over I 10; EB & WB

Fair

Maricopa County, Arizona · 12.6 MI S of JCT US 60 · Structure no. 01148

Built
1967
58 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
301 ft
4 main spans
Daily traffic
14,292
2022 count
Owner
State
State Highway Agency

About this bridge

IRR Riggs Road over I 10; EB & WB is a steel continuous stringer/multi-beam or girder carrying IRR Riggs Road over I 10; EB & WB in Maricopa County, Arizona. It was built in 1967, so it is 58 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 14,292 vehicles a day, roughly 5% of them trucks, projected to reach 14,302 by 2042. The structure is 301 ft (91.7 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesIRR Riggs Road
CrossesI 10; EB & WB
Location12.6 MI S of JCT US 60
RouteCounty Highway 0
CountyMaricopa County
StateArizona
Coordinates33.2192, -111.9207
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length301 ft (91.7 m)
Longest span93 ft (28.3 m)
Deck width31 ft (9.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,292 (2022)
Projected traffic14,302 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR Riggs Road over I 10; EB & WB built?

It was built in 1967, making it 58 years old in 2025.

What condition is IRR Riggs Road over I 10; EB & WB 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 August 2023.

How much traffic does IRR Riggs Road over I 10; EB & WB carry?

About 14,292 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is IRR Riggs Road over I 10; EB & WB?

The structure is 301 ft (91.7 m) long with a longest span of 93 ft (28.3 m) and a deck 31 ft wide.

Who owns IRR Riggs Road over I 10; EB & WB?

It is owned by the State Highway Agency.