US Bridges

County Road over Winn Hollow

Good

Iron County, Utah · 1.5 Miles Sw. of Summit · Structure no. 021007E

Built
1981
44 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
517
2010 count
Owner
County
County Highway Agency

About this bridge

County Road over Winn Hollow is a concrete culvert carrying County Road over Winn Hollow in Iron County, Utah. It was built in 1981, so it is 44 years old, older than the Utah average of 40.1 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 517 vehicles a day, roughly 5% of them trucks, projected to reach 629 by 2030. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Road
CrossesWinn Hollow
Location1.5 Miles Sw. of Summit
RouteCounty Highway 1788
CountyIron County
StateUtah
Coordinates37.79303, -112.96325
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.6 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic517 (2010)
Projected traffic629 by 2030
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road over Winn Hollow built?

It was built in 1981, making it 44 years old in 2025.

What condition is County Road over Winn Hollow 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 County Road over Winn Hollow carry?

About 517 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is County Road over Winn Hollow?

The structure is 22 ft (6.6 m) long with a longest span of 20 ft (6.1 m).

Who owns County Road over Winn Hollow?

It is owned by the County Highway Agency.