US Bridges

I 17; NB over Squaw Creek

Fair

Maricopa County, Arizona · 15.2 MI N JCT SR 74 · Structure no. 00968

Built
1967
58 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
315 ft
4 main spans
Daily traffic
22,606
2023 count
Owner
State
State Highway Agency

About this bridge

I 17; NB over Squaw Creek is a steel continuous stringer/multi-beam or girder carrying I 17; NB over Squaw Creek 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 22,606 vehicles a day, roughly 14% of them trucks, projected to reach 22,616 by 2042. The structure is 315 ft (96 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 17; NB
CrossesSquaw Creek
Location15.2 MI N JCT SR 74
RouteInterstate 17
CountyMaricopa County
StateArizona
Coordinates34.0133, -112.1369
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length315 ft (96 m)
Longest span85 ft (25.9 m)
Deck width36 ft (10.9 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deck35 ft (10.7 m)

Traffic and service

Average daily traffic22,606 (2023)
Projected traffic22,616 by 2042
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 17; NB over Squaw Creek built?

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

What condition is I 17; NB over Squaw Creek 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 I 17; NB over Squaw Creek carry?

About 22,606 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is I 17; NB over Squaw Creek?

The structure is 315 ft (96 m) long with a longest span of 85 ft (25.9 m) and a deck 36 ft wide.

Who owns I 17; NB over Squaw Creek?

It is owned by the State Highway Agency.