US Bridges

Fdr 337 over Kisatchie Bayou

Fair

Natchitoches Parish, Louisiana · National Forest Road · Structure no. 080603000002311

Built
1970
55 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
80 ft
5 main spans
Daily traffic
30
1976 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 337 over Kisatchie Bayou is a wood or timber stringer/multi-beam or girder carrying Fdr 337 over Kisatchie Bayou in Natchitoches 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 5 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 80 ft (24.4 m) long and 16 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesFdr 337
CrossesKisatchie Bayou
LocationNational Forest Road
RouteFederal Lands Road 337.6
CountyNatchitoches Parish
StateLouisiana
Coordinates31.43424, -93.23585
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans5
Design loadH 15
Structure length80 ft (24.4 m)
Longest span17 ft (5.2 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.3 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 closed8.7 mi (14 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 337 over Kisatchie Bayou built?

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

What condition is Fdr 337 over Kisatchie Bayou 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 337 over Kisatchie Bayou carry?

About 30 vehicles per day (1976 count).

How long is Fdr 337 over Kisatchie Bayou?

The structure is 80 ft (24.4 m) long with a longest span of 17 ft (5.2 m) and a deck 16 ft wide.

Who owns Fdr 337 over Kisatchie Bayou?

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