US Bridges

56th ST over Wash

Fair

Maricopa County, Arizona · 400 S of Dynamite · Structure no. 11279

Built
1997
28 years old
Condition
Fair
inspected March 2021
Type
Culvert
Concrete Continuous
Length
64 ft
5 main spans
Daily traffic
150
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

56th ST over Wash is a concrete continuous culvert carrying 56th ST over Wash in Maricopa County, Arizona. It was built in 1997, so it is 28 years old, younger 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 150 vehicles a day, roughly 5% of them trucks, projected to reach 160 by 2038. The structure is 64 ft (19.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries56th ST
CrossesWash
Location400 S of Dynamite
RouteCity Street 0
CountyMaricopa County
StateArizona
Coordinates33.7371, -111.9606
Functional classUrban Local

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 inspectionMarch 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans5
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2018)
Projected traffic160 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 56th ST over Wash built?

It was built in 1997, making it 28 years old in 2025.

What condition is 56th ST 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 March 2021.

How much traffic does 56th ST over Wash carry?

About 150 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is 56th ST over Wash?

The structure is 64 ft (19.5 m) long with a longest span of 12 ft (3.7 m).

Who owns 56th ST over Wash?

It is owned by the City or Municipal Highway Agency.