US Bridges

4th Avenue over High School Wash

Fair

Pima County, Arizona · 250 Ft S of 7th ST · Structure no. 08936

Built
1910
115 years old, rebuilt 2012
Condition
Fair
inspected July 2021
Type
Culvert
Concrete Continuous
Length
22 ft
3 main spans
Daily traffic
7,162
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

4th Avenue over High School Wash is a concrete continuous culvert carrying 4th Avenue over High School Wash in Pima County, Arizona. It was built in 1910 and reconstructed in 2012, so it is 115 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 7,162 vehicles a day, roughly 10% of them trucks, projected to reach 7,172 by 2040. The structure is 22 ft (6.7 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries4th Avenue
CrossesHigh School Wash
Location250 Ft S of 7th ST
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.22569, -110.96558
Functional classUrban 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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span7 ft (2.1 m)
Deck width80 ft (24.3 m)
Roadway width55 ft (16.9 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic7,162 (2020)
Projected traffic7,172 by 2040
Trucks10%
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 4th Avenue over High School Wash built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 2012.

What condition is 4th Avenue over High School 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 July 2021.

How much traffic does 4th Avenue over High School Wash carry?

About 7,162 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is 4th Avenue over High School Wash?

The structure is 22 ft (6.7 m) long with a longest span of 7 ft (2.1 m) and a deck 80 ft wide.

Who owns 4th Avenue over High School Wash?

It is owned by the City or Municipal Highway Agency.