US Bridges

I 17 over 7th Avenue

Fair

Maricopa County, Arizona · 2.9 MI W JCT I 10 · Structure no. 00723

Built
1961
64 years old, rebuilt 1984
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
104 ft
2 main spans
Daily traffic
100,493
2021 count
Owner
State
State Highway Agency

About this bridge

I 17 over 7th Avenue is a prestressed concrete stringer/multi-beam or girder carrying I 17 over 7th Avenue in Maricopa County, Arizona. It was built in 1961 and reconstructed in 1984, so it is 64 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 6 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 100,493 vehicles a day, roughly 12% of them trucks, projected to reach 100,503 by 2041. The structure is 104 ft (31.7 m) long and 113 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI 17
Crosses7th Avenue
Location2.9 MI W JCT I 10
RouteInterstate 17
CountyMaricopa County
StateArizona
Coordinates33.4293, -112.0823
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating92 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span51 ft (15.5 m)
Deck width113 ft (34.4 m)
Roadway width106 ft (32.2 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic100,493 (2021)
Projected traffic100,503 by 2041
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 17 over 7th Avenue built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1984.

What condition is I 17 over 7th Avenue 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 2024.

How much traffic does I 17 over 7th Avenue carry?

About 100,493 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is I 17 over 7th Avenue?

The structure is 104 ft (31.7 m) long with a longest span of 51 ft (15.5 m) and a deck 113 ft wide.

Who owns I 17 over 7th Avenue?

It is owned by the State Highway Agency.