US Bridges

Fdr 360 over Bayou Livrogne

Fair

Natchitoches Parish, Louisiana · 6.5 M. Wsw.Of Gorum · Structure no. 080603000002320

Built
1978
47 years old
Condition
Fair
inspected January 2023
Type
Channel Beam
Prestressed Concrete
Length
81 ft
4 main spans
Daily traffic
30
1976 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 360 over Bayou Livrogne is a prestressed concrete channel beam carrying Fdr 360 over Bayou Livrogne in Natchitoches Parish, Louisiana. It was built in 1978, so it is 47 years old, older than the Louisiana average of 43 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 30 vehicles a day, projected to reach 45 by 2045. The structure is 81 ft (24.7 m) long and 17 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

Location

Open in Google Maps
CarriesFdr 360
CrossesBayou Livrogne
Location6.5 M. Wsw.Of Gorum
RouteFederal Lands Road 360.1
CountyNatchitoches Parish
StateLouisiana
Coordinates31.41337, -93.05211
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27.9 US tons
Inventory rating19.6 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans4
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span20 ft (6.1 m)
Deck width17 ft (5.1 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (1976)
Projected traffic45 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13.7 mi (22 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 Fdr 360 over Bayou Livrogne built?

It was built in 1978, making it 47 years old in 2025.

What condition is Fdr 360 over Bayou Livrogne 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 January 2023.

How much traffic does Fdr 360 over Bayou Livrogne carry?

About 30 vehicles per day (1976 count).

How long is Fdr 360 over Bayou Livrogne?

The structure is 81 ft (24.7 m) long with a longest span of 20 ft (6.1 m) and a deck 17 ft wide.

Who owns Fdr 360 over Bayou Livrogne?

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