US Bridges

23rd Avenue over Sl 101

Good

Maricopa County, Arizona · 23.70 MI N of I 10 · Structure no. 02132

Built
1991
34 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
272 ft
2 main spans
Daily traffic
5,791
2023 count
Owner
State
State Highway Agency

About this bridge

23rd Avenue over Sl 101 is a prestressed concrete continuous box beam or girders - single or spread carrying 23rd Avenue over Sl 101 in Maricopa County, Arizona. It was built in 1991, so it is 34 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 5,791 vehicles a day, roughly 5% of them trucks, projected to reach 5,801 by 2042. The structure is 272 ft (82.9 m) long and 89 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries23rd Avenue
CrossesSl 101
Location23.70 MI N of I 10
RouteCity Street 0
StateArizona
Coordinates33.6684, -112.1086
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 geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length272 ft (82.9 m)
Longest span146 ft (44.5 m)
Deck width89 ft (27.1 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,791 (2023)
Projected traffic5,801 by 2042
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 23rd Avenue over Sl 101 built?

It was built in 1991, making it 34 years old in 2025.

What condition is 23rd Avenue over Sl 101 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 23rd Avenue over Sl 101 carry?

About 5,791 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is 23rd Avenue over Sl 101?

The structure is 272 ft (82.9 m) long with a longest span of 146 ft (44.5 m) and a deck 89 ft wide.

Who owns 23rd Avenue over Sl 101?

It is owned by the State Highway Agency.