US Bridges

Fdr 360 over Steep Branch

Fair

Natchitoches Parish, Louisiana · 5.8 M. Wnm. of Gorum · Structure no. 080603000002323

Built
1975
50 years old
Condition
Fair
inspected January 2025
Type
Channel Beam
Prestressed Concrete
Length
42 ft
2 main spans
Daily traffic
30
1976 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 360 over Steep Branch is a prestressed concrete channel beam carrying Fdr 360 over Steep Branch in Natchitoches Parish, Louisiana. It was built in 1975, so it is 50 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 42 ft (12.8 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
CrossesSteep Branch
Location5.8 M. Wnm. of Gorum
RouteFederal Lands Road 360.5
CountyNatchitoches Parish
StateLouisiana
Coordinates31.46117, -93.03998
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 2025
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 alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating19.6 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length42 ft (12.8 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 Steep Branch built?

It was built in 1975, making it 50 years old in 2025.

What condition is Fdr 360 over Steep Branch 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 2025.

How much traffic does Fdr 360 over Steep Branch carry?

About 30 vehicles per day (1976 count).

How long is Fdr 360 over Steep Branch?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.1 m) and a deck 17 ft wide.

Who owns Fdr 360 over Steep Branch?

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