US Bridges

SR-163 over Unnamed Wash

Good

San Juan County, Utah · 2 Miles So.Of Mexican Hat · Structure no. 0V 650

Built
1957
68 years old
Condition
Good
inspected August 2023
Type
Culvert
Steel
Length
20 ft
1 main span
Daily traffic
2,683
2022 count
Owner
State
State Highway Agency

About this bridge

SR-163 over Unnamed Wash is a steel culvert carrying SR-163 over Unnamed Wash in San Juan County, Utah. It was built in 1957, so it is 68 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 2,683 vehicles a day, roughly 27% of them trucks, projected to reach 3,220 by 2042. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSR-163
CrossesUnnamed Wash
Location2 Miles So.Of Mexican Hat
RouteState Highway 163
CountySan Juan County
StateUtah
Coordinates37.13144, -109.89111
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 inspectionAugust 2023
Inspection intervalevery 24 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 alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating106.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length20 ft (6.2 m)
Longest span20 ft (6.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,683 (2022)
Projected traffic3,220 by 2042
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR-163 over Unnamed Wash built?

It was built in 1957, making it 68 years old in 2025.

What condition is SR-163 over Unnamed 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 August 2023.

How much traffic does SR-163 over Unnamed Wash carry?

About 2,683 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is SR-163 over Unnamed Wash?

The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m).

Who owns SR-163 over Unnamed Wash?

It is owned by the State Highway Agency.