US Bridges

IRR SR 85 over Wash

Fair

Maricopa County, Arizona · 20.5 MI S JCT B 8 · Structure no. 04573

Built
1939
86 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
24 ft
2 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 1939, so it is 86 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 24 ft (7.3 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR SR 85
CrossesWash
Location20.5 MI S JCT B 8
RouteState Highway 85
CountyMaricopa County
StateArizona
Coordinates32.67744, -112.85656
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width35 ft (10.8 m)
Roadway width33 ft (10.2 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 85 over Wash built?

It was built in 1939, making it 86 years old in 2025.

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 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 35 ft wide.

Who owns IRR SR 85 over Wash?

It is owned by the State Highway Agency.