US Bridges

I 19; NB over Tubac RD

Fair

Santa Cruz County, Arizona · 13.9 MI N JCT SR 289 · Structure no. 01875

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
134 ft
1 main span
Daily traffic
10,495
2023 count
Owner
State
State Highway Agency

About this bridge

I 19; NB over Tubac RD is a prestressed concrete box beam or girders - single or spread carrying I 19; NB over Tubac RD in Santa Cruz County, Arizona. It was built in 1978, so it is 47 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 10,495 vehicles a day, roughly 9% of them trucks, projected to reach 10,505 by 2042. The structure is 134 ft (40.8 m) long and 45 ft wide.

Location

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CarriesI 19; NB
CrossesTubac RD
Location13.9 MI N JCT SR 289
RouteInterstate 19
CountySanta Cruz County
StateArizona
Coordinates31.6066, -111.0514
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span132 ft (40.2 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,495 (2023)
Projected traffic10,505 by 2042
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 19; NB over Tubac RD built?

It was built in 1978, making it 47 years old in 2025.

What condition is I 19; NB over Tubac RD 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 May 2024.

How much traffic does I 19; NB over Tubac RD carry?

About 10,495 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I 19; NB over Tubac RD?

The structure is 134 ft (40.8 m) long with a longest span of 132 ft (40.2 m) and a deck 45 ft wide.

Who owns I 19; NB over Tubac RD?

It is owned by the State Highway Agency.