US Bridges

SR-163 over Unnamed Wash

Fair

San Juan County, Utah · 1 Mile No.Of Mexican Hat · Structure no. 0V 811

Built
1962
63 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
50 ft
2 main spans
Daily traffic
2,115
2021 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 1962, so it is 63 years old, older than the Utah average of 40.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,115 vehicles a day, roughly 27% of them trucks, projected to reach 2,538 by 2041. The structure is 50 ft (15.2 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSR-163
CrossesUnnamed Wash
Location1 Mile No.Of Mexican Hat
RouteState Highway 163
CountySan Juan County
StateUtah
Coordinates37.15492, -109.857
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than 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 spans2
Design loadH 15
Structure length50 ft (15.2 m)
Longest span21 ft (6.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,115 (2021)
Projected traffic2,538 by 2041
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 1962, making it 63 years old in 2025.

What condition is SR-163 over Unnamed Wash in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

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

About 2,115 vehicles per day (2021 count), of which roughly 27% are trucks.

How long is SR-163 over Unnamed Wash?

The structure is 50 ft (15.2 m) long with a longest span of 21 ft (6.4 m).

Who owns SR-163 over Unnamed Wash?

It is owned by the State Highway Agency.