US Bridges

I 19; NB over Drainageway

Fair

Pima County, Arizona · 2.8 MI S JCT I 10 · Structure no. 01121

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
147 ft
4 main spans
Daily traffic
42,594
2022 count
Owner
State
State Highway Agency

About this bridge

I 19; NB over Drainageway is a concrete continuous slab carrying I 19; NB over Drainageway in Pima County, Arizona. It was built in 1965, so it is 60 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 42,594 vehicles a day, roughly 13% of them trucks, projected to reach 42,604 by 2042. The structure is 147 ft (44.8 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 19; NB
CrossesDrainageway
Location2.8 MI S JCT I 10
RouteInterstate 19
CountyPima County
StateArizona
Coordinates32.1551, -110.9862
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length147 ft (44.8 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic42,594 (2022)
Projected traffic42,604 by 2042
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 19; NB over Drainageway built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 19; NB over Drainageway 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 September 2023.

How much traffic does I 19; NB over Drainageway carry?

About 42,594 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is I 19; NB over Drainageway?

The structure is 147 ft (44.8 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns I 19; NB over Drainageway?

It is owned by the State Highway Agency.