US Bridges

North 1st Avenue over Medium Wash

Good

Pima County, Arizona · 0.3 MI S JCT River RD · Structure no. 09616

Built
1961
64 years old
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
43 ft
4 main spans
Daily traffic
28,223
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

North 1st Avenue over Medium Wash is a concrete continuous culvert carrying North 1st Avenue over Medium Wash in Pima County, Arizona. It was built in 1961, so it is 64 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 28,223 vehicles a day, roughly 10% of them trucks, projected to reach 28,243 by 2042. The structure is 43 ft (13.1 m) long and 90 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNorth 1st Avenue
CrossesMedium Wash
Location0.3 MI S JCT River RD
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.291, -110.9611
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span10 ft (3 m)
Deck width90 ft (27.4 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,223 (2024)
Projected traffic28,243 by 2042
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 North 1st Avenue over Medium Wash built?

It was built in 1961, making it 64 years old in 2025.

What condition is North 1st Avenue over Medium Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does North 1st Avenue over Medium Wash carry?

About 28,223 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is North 1st Avenue over Medium Wash?

The structure is 43 ft (13.1 m) long with a longest span of 10 ft (3 m) and a deck 90 ft wide.

Who owns North 1st Avenue over Medium Wash?

It is owned by the City or Municipal Highway Agency.