US Bridges

Forest Road 30520 over Granite Creek

Fair

Teton County, Wyoming · 15 Mi. East of Hoback JCT · Structure no. 040304000001067

Built
1982
43 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
450
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road 30520 over Granite Creek is a prestressed concrete tee beam carrying Forest Road 30520 over Granite Creek in Teton County, Wyoming. It was built in 1982, so it is 43 years old, younger 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 5 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 450 vehicles a day, projected to reach 675 by 2045. The structure is 58 ft (17.7 m) long and 18 ft wide.

Location

Open in Google Maps
CarriesForest Road 30520
CrossesGranite Creek
Location15 Mi. East of Hoback JCT
RouteFederal Lands Road 30520
CountyTeton County
StateWyoming
Coordinates43.34871, -110.43888
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.5 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length58 ft (17.7 m)
Longest span57 ft (17.4 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (—)
Projected traffic675 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$141,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Forest Road 30520 over Granite Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Forest Road 30520 over Granite Creek 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 September 2024.

How much traffic does Forest Road 30520 over Granite Creek carry?

About 450 vehicles per day (latest count).

How long is Forest Road 30520 over Granite Creek?

The structure is 58 ft (17.7 m) long with a longest span of 57 ft (17.4 m) and a deck 18 ft wide.

Who owns Forest Road 30520 over Granite Creek?

It is owned by the U.S. Forest Service.