US Bridges

IRR SR 85 over Wash

Fair

Maricopa County, Arizona · 28.6 MI S JCT B 8 · Structure no. 04577

Built
1937
88 years old, rebuilt 1998
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
1,143
2021 count
Owner
State
State Highway Agency

About this bridge

IRR SR 85 over Wash is a concrete continuous culvert carrying IRR SR 85 over Wash in Maricopa County, Arizona. It was built in 1937 and reconstructed in 1998, so it is 88 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 1,143 vehicles a day, roughly 10% of them trucks, projected to reach 1,153 by 2041. The structure is 32 ft (9.8 m) long and 87 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR SR 85
CrossesWash
Location28.6 MI S JCT B 8
RouteState Highway 85
CountyMaricopa County
StateArizona
Coordinates32.56219, -112.87775
Functional classRural Minor 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width87 ft (26.5 m)
Roadway width85 ft (25.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,143 (2021)
Projected traffic1,153 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 85 over Wash built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1998.

What condition is IRR SR 85 over Wash 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 85 over Wash carry?

About 1,143 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is IRR SR 85 over Wash?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 87 ft wide.

Who owns IRR SR 85 over Wash?

It is owned by the State Highway Agency.