US Bridges

Fdr 556 over Prairie Creek

Fair

Grant Parish, Louisiana · Logmi 1.56 FR 546 to · Structure no. 080604000002444

Built
1962
63 years old
Condition
Fair
inspected October 2022
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
46 ft
3 main spans
Daily traffic
79
1979 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 556 over Prairie Creek is a wood or timber stringer/multi-beam or girder carrying Fdr 556 over Prairie Creek in Grant Parish, Louisiana. It was built in 1962, so it is 63 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 79 vehicles a day, projected to reach 118 by 2045. The structure is 46 ft (14 m) long and 16 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesFdr 556
CrossesPrairie Creek
LocationLogmi 1.56 FR 546 to
RouteFederal Lands Road 556
CountyGrant Parish
StateLouisiana
Coordinates31.75118, -92.59754
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.1 US tons
Inventory rating27.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 15
Structure length46 ft (14 m)
Longest span15 ft (4.6 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (1979)
Projected traffic118 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 556 over Prairie Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Fdr 556 over Prairie 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 October 2022.

How much traffic does Fdr 556 over Prairie Creek carry?

About 79 vehicles per day (1979 count).

How long is Fdr 556 over Prairie Creek?

The structure is 46 ft (14 m) long with a longest span of 15 ft (4.6 m) and a deck 16 ft wide.

Who owns Fdr 556 over Prairie Creek?

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