US Bridges

I 10 Sky Harb Ramp over 24th ST

Fair

Maricopa County, Arizona · 0.4 MI E of JCT I 10 · Structure no. 01987

Built
1986
39 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
240 ft
3 main spans
Daily traffic
32,281
2020 count
Owner
State
State Highway Agency

About this bridge

I 10 Sky Harb Ramp over 24th ST is a prestressed concrete continuous stringer/multi-beam or girder carrying I 10 Sky Harb Ramp over 24th ST in Maricopa County, Arizona. It was built in 1986, so it is 39 years old, younger 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 32,281 vehicles a day, roughly 4% of them trucks, projected to reach 32,291 by 2040. The structure is 240 ft (73.2 m) long and 73 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI 10 Sky Harb Ramp
Crosses24th ST
Location0.4 MI E of JCT I 10
RouteInterstate 10
CountyMaricopa County
StateArizona
Coordinates33.4376, -112.0306
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
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 rating69 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length240 ft (73.2 m)
Longest span109 ft (33.2 m)
Deck width73 ft (22.3 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,281 (2020)
Projected traffic32,291 by 2040
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 10 Sky Harb Ramp over 24th ST built?

It was built in 1986, making it 39 years old in 2025.

What condition is I 10 Sky Harb Ramp over 24th ST 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 10 Sky Harb Ramp over 24th ST carry?

About 32,281 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is I 10 Sky Harb Ramp over 24th ST?

The structure is 240 ft (73.2 m) long with a longest span of 109 ft (33.2 m) and a deck 73 ft wide.

Who owns I 10 Sky Harb Ramp over 24th ST?

It is owned by the State Highway Agency.