US Bridges

37th Street Ramp over Tucson Diversion Channel

Good

Pima County, Arizona · At Palo Verde Road · Structure no. 10503

Built
2012
13 years old
Condition
Good
inspected January 2023
Type
Arch - Deck
Concrete
Length
98 ft
1 main span
Daily traffic
1,650
2022 count
Owner
County
County Highway Agency

About this bridge

37th Street Ramp over Tucson Diversion Channel is a concrete arch - deck carrying 37th Street Ramp over Tucson Diversion Channel in Pima County, Arizona. It was built in 2012, so it is 13 years old, younger 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 1,650 vehicles a day, roughly 3% of them trucks, projected to reach 1,660 by 2042. The structure is 98 ft (29.9 m) long and 138 ft wide.

Carries37th Street Ramp
CrossesTucson Diversion Channel
LocationAt Palo Verde Road
RouteCounty Highway 0
StateArizona
Coordinates32.19195, -110.91378
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82 US tons
Inventory rating54 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length98 ft (29.9 m)
Longest span98 ft (29.9 m)
Deck width138 ft (42.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,650 (2022)
Projected traffic1,660 by 2042
Trucks3%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 37th Street Ramp over Tucson Diversion Channel built?

It was built in 2012, making it 13 years old in 2025.

What condition is 37th Street Ramp over Tucson Diversion Channel 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 January 2023.

How much traffic does 37th Street Ramp over Tucson Diversion Channel carry?

About 1,650 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 37th Street Ramp over Tucson Diversion Channel?

The structure is 98 ft (29.9 m) long with a longest span of 98 ft (29.9 m) and a deck 138 ft wide.

Who owns 37th Street Ramp over Tucson Diversion Channel?

It is owned by the County Highway Agency.