US Bridges

I 19; NB over Quartz Wash

Good

Pima County, Arizona · 1.9 MI N of JCT B 19 · Structure no. 01570

Built
1971
54 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
111 ft
4 main spans
Daily traffic
20,358
2021 count
Owner
State
State Highway Agency

About this bridge

I 19; NB over Quartz Wash is a concrete continuous slab carrying I 19; NB over Quartz Wash in Pima County, Arizona. It was built in 1971, so it is 54 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 20,358 vehicles a day, roughly 17% of them trucks, projected to reach 20,368 by 2041. The structure is 111 ft (33.8 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 19; NB
CrossesQuartz Wash
Location1.9 MI N of JCT B 19
RouteInterstate 19
CountyPima County
StateArizona
Coordinates31.934, -110.9864
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than 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 rating67 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length111 ft (33.8 m)
Longest span30 ft (9.1 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,358 (2021)
Projected traffic20,368 by 2041
Trucks17%
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 Quartz Wash built?

It was built in 1971, making it 54 years old in 2025.

What condition is I 19; NB over Quartz 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 May 2023.

How much traffic does I 19; NB over Quartz Wash carry?

About 20,358 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is I 19; NB over Quartz Wash?

The structure is 111 ft (33.8 m) long with a longest span of 30 ft (9.1 m) and a deck 41 ft wide.

Who owns I 19; NB over Quartz Wash?

It is owned by the State Highway Agency.