US Bridges

Marsh Station Road over I-10

Good

Pima County, Arizona · 11.2 Miles W of JCT SR 90 · Structure no. 02766

Built
2010
15 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
268 ft
2 main spans
Daily traffic
185
2022 count
Owner
State
State Highway Agency

About this bridge

Marsh Station Road over I-10 is a prestressed concrete continuous stringer/multi-beam or girder carrying Marsh Station Road over I-10 in Pima County, Arizona. It was built in 2010, so it is 15 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 185 vehicles a day, roughly 10% of them trucks, projected to reach 195 by 2042. The structure is 268 ft (81.7 m) long and 47 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesMarsh Station Road
CrossesI-10
Location11.2 Miles W of JCT SR 90
RouteCounty Highway 0
CountyPima County
StateArizona
Coordinates31.9814, -110.5363
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
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 rating99 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length268 ft (81.7 m)
Longest span131 ft (39.9 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic185 (2022)
Projected traffic195 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed9.9 mi (16 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 Marsh Station Road over I-10 built?

It was built in 2010, making it 15 years old in 2025.

What condition is Marsh Station Road over I-10 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does Marsh Station Road over I-10 carry?

About 185 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Marsh Station Road over I-10?

The structure is 268 ft (81.7 m) long with a longest span of 131 ft (39.9 m) and a deck 47 ft wide.

Who owns Marsh Station Road over I-10?

It is owned by the State Highway Agency.