US Bridges

I 10; EB over Marana Road

Fair

Pima County, Arizona · 25.4 MI SE JCT SR 87 · Structure no. 00773

Built
1963
62 years old, rebuilt 2004
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
127 ft
3 main spans
Daily traffic
34,002
2022 count
Owner
State
State Highway Agency

About this bridge

I 10; EB over Marana Road is a prestressed concrete stringer/multi-beam or girder carrying I 10; EB over Marana Road in Pima County, Arizona. It was built in 1963 and reconstructed in 2004, so it is 62 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 34,002 vehicles a day, roughly 19% of them trucks, projected to reach 34,012 by 2042. The structure is 127 ft (38.7 m) long and 62 ft wide.

Location

Open in Google Maps
CarriesI 10; EB
CrossesMarana Road
Location25.4 MI SE JCT SR 87
RouteInterstate 10
CountyPima County
StateArizona
Coordinates32.4619, -111.2168
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length127 ft (38.7 m)
Longest span63 ft (19.2 m)
Deck width62 ft (18.9 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,002 (2022)
Projected traffic34,012 by 2042
Trucks19%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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; EB over Marana Road built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2004.

What condition is I 10; EB over Marana Road 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 10; EB over Marana Road carry?

About 34,002 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is I 10; EB over Marana Road?

The structure is 127 ft (38.7 m) long with a longest span of 63 ft (19.2 m) and a deck 62 ft wide.

Who owns I 10; EB over Marana Road?

It is owned by the State Highway Agency.