US Bridges

I-8 WB over Tc&gb Railroad

Fair

Maricopa County, Arizona · 0.7 MI E JCT SR 85 · Structure no. 01340

Built
1965
60 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
120 ft
3 main spans
Daily traffic
4,588
2021 count
Owner
State
State Highway Agency

About this bridge

I-8 WB over Tc&gb Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying I-8 WB over Tc&gb Railroad in Maricopa County, Arizona. It was built in 1965, so it is 60 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 4,588 vehicles a day, roughly 26% of them trucks, projected to reach 4,598 by 2041. The structure is 120 ft (36.6 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-8 WB
CrossesTc&gb Railroad
Location0.7 MI E JCT SR 85
RouteInterstate 8
CountyMaricopa County
StateArizona
Coordinates32.937, -112.7222
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum 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 spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span39 ft (11.9 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,588 (2021)
Projected traffic4,598 by 2041
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
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-8 WB over Tc&gb Railroad built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-8 WB over Tc&gb Railroad 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 February 2023.

How much traffic does I-8 WB over Tc&gb Railroad carry?

About 4,588 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is I-8 WB over Tc&gb Railroad?

The structure is 120 ft (36.6 m) long with a longest span of 39 ft (11.9 m) and a deck 40 ft wide.

Who owns I-8 WB over Tc&gb Railroad?

It is owned by the State Highway Agency.