US Bridges

SR 85 over Rainbow Wash

Good

Maricopa County, Arizona · 20.8 MI N JCT SR B 8 · Structure no. 00466

Built
1956
69 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
81 ft
3 main spans
Daily traffic
7,264
2023 count
Owner
State
State Highway Agency

About this bridge

SR 85 over Rainbow Wash is a concrete continuous slab carrying SR 85 over Rainbow Wash in Maricopa County, Arizona. It was built in 1956, so it is 69 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,264 vehicles a day, roughly 25% of them trucks, projected to reach 7,274 by 2042. The structure is 81 ft (24.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 85
CrossesRainbow Wash
Location20.8 MI N JCT SR B 8
RouteState Highway 85
CountyMaricopa County
StateArizona
Coordinates33.23532, -112.64064
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span30 ft (9.1 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,264 (2023)
Projected traffic7,274 by 2042
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 85 over Rainbow Wash built?

It was built in 1956, making it 69 years old in 2025.

What condition is SR 85 over Rainbow Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does SR 85 over Rainbow Wash carry?

About 7,264 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is SR 85 over Rainbow Wash?

The structure is 81 ft (24.7 m) long with a longest span of 30 ft (9.1 m) and a deck 45 ft wide.

Who owns SR 85 over Rainbow Wash?

It is owned by the State Highway Agency.