US Bridges

Dunlap Ave over I 17

Fair

Maricopa County, Arizona · 14.0 MI N JCT I 10 · Structure no. 02496

Built
1998
27 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
180 ft
2 main spans
Daily traffic
46,409
2021 count
Owner
State
State Highway Agency

About this bridge

Dunlap Ave over I 17 is a prestressed concrete continuous box beam or girders - multiple carrying Dunlap Ave over I 17 in Maricopa County, Arizona. It was built in 1998, so it is 27 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 46,409 vehicles a day, roughly 5% of them trucks, projected to reach 46,419 by 2041. The structure is 180 ft (54.9 m) long and 184 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesDunlap Ave
CrossesI 17
Location14.0 MI N JCT I 10
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.5676, -112.1176
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating87 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span88 ft (26.8 m)
Deck width184 ft (56.1 m)
Roadway width112 ft (34.1 m)
Vertical clearance over deck21 ft (6.5 m)

Traffic and service

Average daily traffic46,409 (2021)
Projected traffic46,419 by 2041
Trucks5%
Lanes on structure9
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 Dunlap Ave over I 17 built?

It was built in 1998, making it 27 years old in 2025.

What condition is Dunlap Ave over I 17 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 July 2024.

How much traffic does Dunlap Ave over I 17 carry?

About 46,409 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Dunlap Ave over I 17?

The structure is 180 ft (54.9 m) long with a longest span of 88 ft (26.8 m) and a deck 184 ft wide.

Who owns Dunlap Ave over I 17?

It is owned by the State Highway Agency.