US Bridges

US 89 over Salt River

Fair

Lincoln County, Wyoming · Afton - Alpine JCT · Structure no. BOC

Built
1960
65 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
157 ft
3 main spans
Daily traffic
7,033
2024 count
Owner
State
State Highway Agency

About this bridge

US 89 over Salt River is a prestressed concrete stringer/multi-beam or girder carrying US 89 over Salt River in Lincoln County, Wyoming. It was built in 1960, so it is 65 years old, older than the Wyoming average of 48.4 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 7,033 vehicles a day, roughly 10% of them trucks, projected to reach 9,846 by 2043. The structure is 157 ft (47.9 m) long and 44 ft wide. If it were closed, the detour would be 88.9 mi (143 km).

CarriesUS 89
CrossesSalt River
LocationAfton - Alpine JCT
RouteU.S. Route 89
StateWyoming
Coordinates42.85585, -110.98926
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating96 US tons
Inventory rating57 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length157 ft (47.9 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,033 (2024)
Projected traffic9,846 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed88.9 mi (143 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 89 over Salt River built?

It was built in 1960, making it 65 years old in 2025.

What condition is US 89 over Salt River 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 November 2024.

How much traffic does US 89 over Salt River carry?

About 7,033 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is US 89 over Salt River?

The structure is 157 ft (47.9 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns US 89 over Salt River?

It is owned by the State Highway Agency.