US Bridges

SR366 over Hospital Flats Wash

Good

Graham County, Arizona · _ · Structure no. 07358

Built
2022
3 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
704
2023 count
Owner
State
State Highway Agency

About this bridge

SR366 over Hospital Flats Wash is a concrete culvert carrying SR366 over Hospital Flats Wash in Graham County, Arizona. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 704 vehicles a day, roughly 2% of them trucks, projected to reach 714 by 2042. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesSR366
CrossesHospital Flats Wash
Location_
RouteState Highway 366
CountyGraham County
StateArizona
Coordinates32.6676, -109.8732
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 protection9 ExcellentNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating75.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length21 ft (6.4 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 traffic704 (2023)
Projected traffic714 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 SR366 over Hospital Flats Wash built?

It was built in 2022, making it 3 years old in 2025.

What condition is SR366 over Hospital Flats 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 December 2024.

How much traffic does SR366 over Hospital Flats Wash carry?

About 704 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is SR366 over Hospital Flats Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns SR366 over Hospital Flats Wash?

It is owned by the State Highway Agency.