US Bridges

IRR SR 170 over Wash

Good

Gila County, Arizona · 1.2 MI N JCT US 70 · Structure no. 07215

Built
1969
56 years old, rebuilt 2005
Condition
Good
inspected October 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
4,286
2024 count
Owner
State
State Highway Agency

About this bridge

IRR SR 170 over Wash is a concrete continuous culvert carrying IRR SR 170 over Wash in Gila County, Arizona. It was built in 1969 and reconstructed in 2005, so it is 56 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 4,286 vehicles a day, roughly 10% of them trucks, projected to reach 4,296 by 2042. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 26.1 mi (42 km).

CarriesIRR SR 170
CrossesWash
Location1.2 MI N JCT US 70
RouteState Highway 170
StateArizona
Coordinates33.31429, -110.45494
Functional classRural Major Collector

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 inspectionOctober 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
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,286 (2024)
Projected traffic4,296 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemNo

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 IRR SR 170 over Wash built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2005.

What condition is IRR SR 170 over 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 October 2024.

How much traffic does IRR SR 170 over Wash carry?

About 4,286 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is IRR SR 170 over Wash?

The structure is 21 ft (6.4 m) long with a longest span of 11 ft (3.4 m).

Who owns IRR SR 170 over Wash?

It is owned by the State Highway Agency.