US Bridges

SR 287 over I-10

Fair

Pinal County, Arizona · 4.2 MI N JCT I-8 · Structure no. 01156

Built
1966
59 years old, rebuilt 2008
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
250 ft
4 main spans
Daily traffic
25,363
2022 count
Owner
State
State Highway Agency

About this bridge

SR 287 over I-10 is a steel continuous stringer/multi-beam or girder carrying SR 287 over I-10 in Pinal County, Arizona. It was built in 1966 and reconstructed in 2008, so it is 59 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 25,363 vehicles a day, roughly 6% of them trucks, projected to reach 25,373 by 2042. The structure is 250 ft (76.2 m) long and 88 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSR 287
CrossesI-10
Location4.2 MI N JCT I-8
RouteState Highway 287
CountyPinal County
StateArizona
Coordinates32.8797, -111.6873
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span78 ft (23.8 m)
Deck width88 ft (26.7 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,363 (2022)
Projected traffic25,373 by 2042
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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 SR 287 over I-10 built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2008.

What condition is SR 287 over I-10 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 SR 287 over I-10 carry?

About 25,363 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR 287 over I-10?

The structure is 250 ft (76.2 m) long with a longest span of 78 ft (23.8 m) and a deck 88 ft wide.

Who owns SR 287 over I-10?

It is owned by the State Highway Agency.