US Bridges

Main Avenue over Tucson Arroyo

Fair

Pima County, Arizona · 300 N JCT ST Marys RD · Structure no. 09767

Built
1938
87 years old, rebuilt 1944
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
2,010
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main Avenue over Tucson Arroyo is a concrete continuous culvert carrying Main Avenue over Tucson Arroyo in Pima County, Arizona. It was built in 1938 and reconstructed in 1944, so it is 87 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 2,010 vehicles a day, roughly 10% of them trucks, projected to reach 2,020 by 2042. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMain Avenue
CrossesTucson Arroyo
Location300 N JCT ST Marys RD
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.2286, -110.9771
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck40 ft (12.2 m)

Traffic and service

Average daily traffic2,010 (2023)
Projected traffic2,020 by 2042
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 Main Avenue over Tucson Arroyo built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1944.

What condition is Main Avenue over Tucson Arroyo 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 August 2023.

How much traffic does Main Avenue over Tucson Arroyo carry?

About 2,010 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Main Avenue over Tucson Arroyo?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Main Avenue over Tucson Arroyo?

It is owned by the City or Municipal Highway Agency.