US Bridges

450 Fdr over Branch of Black Creek

Fair

Vernon Parish, Louisiana · 6.2 M. E. of Rosepin · Structure no. 080605000002545

Built
1970
55 years old
Condition
Fair
inspected January 2025
Type
Channel Beam
Prestressed Concrete
Length
40 ft
2 main spans
Daily traffic
20
1976 count
Owner
Federal
U.S. Forest Service

About this bridge

450 Fdr over Branch of Black Creek is a prestressed concrete channel beam carrying 450 Fdr over Branch of Black Creek in Vernon Parish, Louisiana. It was built in 1970, so it is 55 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 20 vehicles a day, projected to reach 30 by 2045. The structure is 40 ft (12.2 m) long and 17 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries450 Fdr
CrossesBranch of Black Creek
Location6.2 M. E. of Rosepin
RouteFederal Lands Road 450.2
CountyVernon Parish
StateLouisiana
Coordinates30.92718, -93.164
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating15.3 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length40 ft (12.2 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 traffic20 (1976)
Projected traffic30 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 450 Fdr over Branch of Black Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is 450 Fdr over Branch of Black 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 January 2025.

How much traffic does 450 Fdr over Branch of Black Creek carry?

About 20 vehicles per day (1976 count).

How long is 450 Fdr over Branch of Black Creek?

The structure is 40 ft (12.2 m) long with a longest span of 20 ft (6.1 m) and a deck 17 ft wide.

Who owns 450 Fdr over Branch of Black Creek?

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