US Bridges

IRR SR B8 over SR 85

Fair

Maricopa County, Arizona · 0.4 MI N JCT I-8 · Structure no. 00702

Built
1962
63 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
3,630
2021 count
Owner
State
State Highway Agency

About this bridge

IRR SR B8 over SR 85 is a concrete continuous slab carrying IRR SR B8 over SR 85 in Maricopa County, Arizona. It was built in 1962, so it is 63 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 3,630 vehicles a day, roughly 52% of them trucks, projected to reach 3,640 by 2041. The structure is 103 ft (31.4 m) long and 61 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesIRR SR B8
CrossesSR 85
Location0.4 MI N JCT I-8
RouteState Highway 8
CountyMaricopa County
StateArizona
Coordinates32.9433, -112.7351
Functional classRural Principal Arterial - Other

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 inspectionApril 2023
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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span43 ft (13.1 m)
Deck width61 ft (18.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deck20 ft (6.1 m)

Traffic and service

Average daily traffic3,630 (2021)
Projected traffic3,640 by 2041
Trucks52%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 IRR SR B8 over SR 85 built?

It was built in 1962, making it 63 years old in 2025.

What condition is IRR SR B8 over SR 85 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 April 2023.

How much traffic does IRR SR B8 over SR 85 carry?

About 3,630 vehicles per day (2021 count), of which roughly 52% are trucks.

How long is IRR SR B8 over SR 85?

The structure is 103 ft (31.4 m) long with a longest span of 43 ft (13.1 m) and a deck 61 ft wide.

Who owns IRR SR B8 over SR 85?

It is owned by the State Highway Agency.