US Bridges

Thunderbird Road over SR 101L

Good

Maricopa County, Arizona · 1 MI N of Cactus RD · Structure no. 02504

Built
2000
25 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
294 ft
2 main spans
Daily traffic
7,341
2023 count
Owner
State
State Highway Agency

About this bridge

Thunderbird Road over SR 101L is a prestressed concrete continuous box beam or girders - single or spread carrying Thunderbird Road over SR 101L in Maricopa County, Arizona. It was built in 2000, so it is 25 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 7,341 vehicles a day, roughly 7% of them trucks, projected to reach 7,351 by 2042. The structure is 294 ft (89.6 m) long and 96 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesThunderbird Road
CrossesSR 101L
Location1 MI N of Cactus RD
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.6116, -111.8919
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating55 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length294 ft (89.6 m)
Longest span151 ft (46 m)
Deck width96 ft (29.4 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,341 (2023)
Projected traffic7,351 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Thunderbird Road over SR 101L built?

It was built in 2000, making it 25 years old in 2025.

What condition is Thunderbird Road over SR 101L 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 2025.

How much traffic does Thunderbird Road over SR 101L carry?

About 7,341 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Thunderbird Road over SR 101L?

The structure is 294 ft (89.6 m) long with a longest span of 151 ft (46 m) and a deck 96 ft wide.

Who owns Thunderbird Road over SR 101L?

It is owned by the State Highway Agency.