US Bridges

Wyo 390 over Granite Creek

Good

Teton County, Wyoming · Wil-Grand Teton Natl Park · Structure no. FOM

Built
1972
53 years old
Condition
Good
inspected August 2023
Type
Culvert
Steel
Length
36 ft
3 main spans
Daily traffic
1,852
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 390 over Granite Creek is a steel culvert carrying Wyo 390 over Granite Creek in Teton County, Wyoming. It was built in 1972, so it is 53 years old, older than the Wyoming average of 48.4 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 1,852 vehicles a day, roughly 2% of them trucks, projected to reach 2,593 by 2043. The structure is 36 ft (11.1 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWyo 390
CrossesGranite Creek
LocationWil-Grand Teton Natl Park
RouteState Highway 390
StateWyoming
Coordinates43.59577, -110.80634
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length36 ft (11.1 m)
Longest span10 ft (2.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,852 (2024)
Projected traffic2,593 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$6,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 390 over Granite Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is Wyo 390 over Granite Creek 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 Wyo 390 over Granite Creek carry?

About 1,852 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Wyo 390 over Granite Creek?

The structure is 36 ft (11.1 m) long with a longest span of 10 ft (2.9 m).

Who owns Wyo 390 over Granite Creek?

It is owned by the State Highway Agency.