US Bridges

NFSR 349 over Libby Creek

Fair

Albany County, Wyoming · Entrance to Spruce Cg · Structure no. 020605000001235

Built
1961
64 years old
Condition
Fair
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
44
2002 count
Owner
Federal
U.S. Forest Service

About this bridge

NFSR 349 over Libby Creek is a prestressed concrete tee beam carrying NFSR 349 over Libby Creek in Albany County, Wyoming. It was built in 1961, so it is 64 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 44 vehicles a day, projected to reach 66 by 2045. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

Location

Open in Google Maps
CarriesNFSR 349
CrossesLibby Creek
LocationEntrance to Spruce Cg
RouteFederal Lands Road 349
CountyAlbany County
StateWyoming
Coordinates41.31931, -106.15827
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span27 ft (8.2 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44 (2002)
Projected traffic66 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed620.7 mi (999 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was NFSR 349 over Libby Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is NFSR 349 over Libby 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 August 2024.

How much traffic does NFSR 349 over Libby Creek carry?

About 44 vehicles per day (2002 count).

How long is NFSR 349 over Libby Creek?

The structure is 30 ft (9.1 m) long with a longest span of 27 ft (8.2 m) and a deck 16 ft wide.

Who owns NFSR 349 over Libby Creek?

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