US Bridges

Fdr 909 over Darbonne NW Fork

Poor

Claiborne Parish, Louisiana · National Forest Road · Structure no. 080608000002814

Built
1978
47 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
5
1996 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 909 over Darbonne NW Fork is a steel stringer/multi-beam or girder carrying Fdr 909 over Darbonne NW Fork in Claiborne 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5 vehicles a day, projected to reach 7 by 2045. The structure is 30 ft (9.1 m) long and 12 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesFdr 909
CrossesDarbonne NW Fork
LocationNational Forest Road
RouteFederal Lands Road 909.2
Coordinates32.8898, -92.9211
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.2 US tons
Inventory rating16.4 US tons

Structure

MaterialSteel
DeckOpen grating
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (1996)
Projected traffic7 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 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 909 over Darbonne NW Fork built?

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

What condition is Fdr 909 over Darbonne NW Fork in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Fdr 909 over Darbonne NW Fork carry?

About 5 vehicles per day (1996 count).

How long is Fdr 909 over Darbonne NW Fork?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 12 ft wide.

Who owns Fdr 909 over Darbonne NW Fork?

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