US Bridges

I 19; Nb-Sb & Efr over Niger Canyon

Good

Santa Cruz County, Arizona · 9.4 MI North JCT SR 289 · Structure no. 06664

Built
1978
47 years old
Condition
Good
inspected June 2024
Type
Culvert
Steel
Length
37 ft
3 main spans
Daily traffic
17,500
2020 count
Owner
State
State Highway Agency

About this bridge

I 19; Nb-Sb & Efr over Niger Canyon is a steel culvert carrying I 19; Nb-Sb & Efr over Niger Canyon 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 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 17,500 vehicles a day, roughly 9% of them trucks, projected to reach 17,510 by 2040. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

No coordinates are recorded for this structure.

CarriesI 19; Nb-Sb & Efr
CrossesNiger Canyon
Location9.4 MI North JCT SR 289
RouteInterstate 19
CountySanta Cruz County
StateArizona
Functional classRural 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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,500 (2020)
Projected traffic17,510 by 2040
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 19; Nb-Sb & Efr over Niger Canyon built?

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

What condition is I 19; Nb-Sb & Efr over Niger Canyon 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 June 2024.

How much traffic does I 19; Nb-Sb & Efr over Niger Canyon carry?

About 17,500 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is I 19; Nb-Sb & Efr over Niger Canyon?

The structure is 37 ft (11.3 m) long with a longest span of 9 ft (2.7 m).

Who owns I 19; Nb-Sb & Efr over Niger Canyon?

It is owned by the State Highway Agency.