US Bridges

SR 88 over Davis Wash

Fair

Maricopa County, Arizona · 10.2 MI SW JCT SR 188 · Structure no. 00221

Built
1939
86 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
76 ft
3 main spans
Daily traffic
321
2022 count
Owner
State
State Highway Agency

About this bridge

SR 88 over Davis Wash is a concrete continuous slab carrying SR 88 over Davis 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 321 vehicles a day, roughly 4% of them trucks, projected to reach 331 by 2042. The structure is 76 ft (23.2 m) long and 27 ft wide. If it were closed, the detour would be 85.1 mi (137 km).

Location

Open in Google Maps
CarriesSR 88
CrossesDavis Wash
Location10.2 MI SW JCT SR 188
RouteState Highway 88
CountyMaricopa County
StateArizona
Coordinates33.58169, -111.21257
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.1 US tons
Inventory rating29 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span25 ft (7.6 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic321 (2022)
Projected traffic331 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed85.1 mi (137 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 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 88 over Davis Wash built?

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

What condition is SR 88 over Davis 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 March 2024.

How much traffic does SR 88 over Davis Wash carry?

About 321 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is SR 88 over Davis Wash?

The structure is 76 ft (23.2 m) long with a longest span of 25 ft (7.6 m) and a deck 27 ft wide.

Who owns SR 88 over Davis Wash?

It is owned by the State Highway Agency.