US Bridges

I-8 Sfr over Wash

Fair

Maricopa County, Arizona · 5.3 MI W JCT SR 85 · Structure no. 01505

Built
1923
102 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
44 ft
2 main spans
Daily traffic
602
2021 count
Owner
State
State Highway Agency

About this bridge

I-8 Sfr over Wash is a concrete slab carrying I-8 Sfr over Wash in Maricopa County, Arizona. It was built in 1923, so it is 102 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 602 vehicles a day, roughly 5% of them trucks, projected to reach 612 by 2041. The structure is 44 ft (13.4 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-8 Sfr
CrossesWash
Location5.3 MI W JCT SR 85
RouteState Highway 8
CountyMaricopa County
StateArizona
Coordinates32.9293, -112.8221
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length44 ft (13.4 m)
Longest span22 ft (6.7 m)
Deck width28 ft (8.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic602 (2021)
Projected traffic612 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-8 Sfr over Wash built?

It was built in 1923, making it 102 years old in 2025.

What condition is I-8 Sfr 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 February 2023.

How much traffic does I-8 Sfr over Wash carry?

About 602 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is I-8 Sfr over Wash?

The structure is 44 ft (13.4 m) long with a longest span of 22 ft (6.7 m) and a deck 28 ft wide.

Who owns I-8 Sfr over Wash?

It is owned by the State Highway Agency.