US Bridges

SR 188 over Tinhorn Wash

Good

Gila County, Arizona · 2.6 MI N JCT US 60 · Structure no. 06600

Built
1976
49 years old, rebuilt 2006
Condition
Good
inspected March 2024
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
2,290
2022 count
Owner
State
State Highway Agency

About this bridge

SR 188 over Tinhorn Wash is a concrete continuous culvert carrying SR 188 over Tinhorn Wash in Gila County, Arizona. It was built in 1976 and reconstructed in 2006, so it is 49 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 2,290 vehicles a day, roughly 37% of them trucks, projected to reach 2,300 by 2042. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 19.9 mi (32 km).

CarriesSR 188
CrossesTinhorn Wash
Location2.6 MI N JCT US 60
RouteState Highway 188
StateArizona
Coordinates33.4487, -110.83813
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,290 (2022)
Projected traffic2,300 by 2042
Trucks37%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 SR 188 over Tinhorn Wash built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2006.

What condition is SR 188 over Tinhorn 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 March 2024.

How much traffic does SR 188 over Tinhorn Wash carry?

About 2,290 vehicles per day (2022 count), of which roughly 37% are trucks.

How long is SR 188 over Tinhorn Wash?

The structure is 38 ft (11.6 m) long with a longest span of 10 ft (3 m).

Who owns SR 188 over Tinhorn Wash?

It is owned by the State Highway Agency.