US Bridges

I 17; E FR RD over Cap Aqueduct

Fair

Maricopa County, Arizona · 3.6 MI South JCT SR 74 · Structure no. 01402

Built
1977
48 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
86 ft
1 main span
Daily traffic
1,000
2022 count
Owner
State
State Highway Agency

About this bridge

I 17; E FR RD over Cap Aqueduct is a prestressed concrete stringer/multi-beam or girder carrying I 17; E FR RD over Cap Aqueduct in Maricopa County, Arizona. It was built in 1977, so it is 48 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,010 by 2042. The structure is 86 ft (26.2 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 17; E FR RD
CrossesCap Aqueduct
Location3.6 MI South JCT SR 74
RouteState Highway 17
CountyMaricopa County
StateArizona
Coordinates33.74678, -112.12424
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span84 ft (25.6 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck20 ft (6.1 m)

Traffic and service

Average daily traffic1,000 (2022)
Projected traffic1,010 by 2042
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 17; E FR RD over Cap Aqueduct built?

It was built in 1977, making it 48 years old in 2025.

What condition is I 17; E FR RD over Cap Aqueduct 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 December 2024.

How much traffic does I 17; E FR RD over Cap Aqueduct carry?

About 1,000 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is I 17; E FR RD over Cap Aqueduct?

The structure is 86 ft (26.2 m) long with a longest span of 84 ft (25.6 m) and a deck 29 ft wide.

Who owns I 17; E FR RD over Cap Aqueduct?

It is owned by the State Highway Agency.