US Bridges

Zion - Mount Carme over Oak Creek & Watchman Res

Fair

Washington County, Utah · From South Entrance Go 0 · Structure no. 1590003P0000000

Built
1958
67 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
112 ft
2 main spans
Daily traffic
1,341
2022 count
Owner
Federal
National Park Service

About this bridge

Zion - Mount Carme over Oak Creek & Watchman Res is a steel stringer/multi-beam or girder carrying Zion - Mount Carme over Oak Creek & Watchman Res in Washington County, Utah. It was built in 1958, so it is 67 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 1,341 vehicles a day, roughly 20% of them trucks, projected to reach 1,609 by 2042. The structure is 112 ft (34.1 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesZion - Mount Carme
CrossesOak Creek & Watchman Res
LocationFrom South Entrance Go 0
RouteState Highway 9
CountyWashington County
StateUtah
Coordinates37.20745, -112.98071
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span63 ft (19.2 m)
Deck width35 ft (10.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,341 (2022)
Projected traffic1,609 by 2042
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$75,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Zion - Mount Carme over Oak Creek & Watchman Res built?

It was built in 1958, making it 67 years old in 2025.

What condition is Zion - Mount Carme over Oak Creek & Watchman Res 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 May 2023.

How much traffic does Zion - Mount Carme over Oak Creek & Watchman Res carry?

About 1,341 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Zion - Mount Carme over Oak Creek & Watchman Res?

The structure is 112 ft (34.1 m) long with a longest span of 63 ft (19.2 m) and a deck 35 ft wide.

Who owns Zion - Mount Carme over Oak Creek & Watchman Res?

It is owned by the National Park Service.