US Bridges

LA0066 over Big Bayou Sara

Fair

West Feliciana Parish, Louisiana · LA0066 · Structure no. 616302510101511

Built
1949
76 years old
Condition
Fair
inspected August 2024
Type
Truss - Thru
Steel
Length
718 ft
5 main spans
Daily traffic
4,492
2021 count
Owner
State
State Highway Agency

About this bridge

LA0066 over Big Bayou Sara is a steel truss - thru carrying LA0066 over Big Bayou Sara in West Feliciana Parish, Louisiana. It was built in 1949, so it is 76 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 4,492 vehicles a day, roughly 10% of them trucks, projected to reach 4,941 by 2041. The structure is 718 ft (218.8 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLA0066
CrossesBig Bayou Sara
LocationLA0066
RouteState Highway 66
CountyWest Feliciana Parish
StateLouisiana
Coordinates30.84483, -91.40445
Functional classRural Major Collector

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 inspectionAugust 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating36 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans5 (+5 approach)
Design loadH 15
Structure length718 ft (218.8 m)
Longest span103 ft (31.4 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,492 (2021)
Projected traffic4,941 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0066 over Big Bayou Sara built?

It was built in 1949, making it 76 years old in 2025.

What condition is LA0066 over Big Bayou Sara 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 August 2024.

How much traffic does LA0066 over Big Bayou Sara carry?

About 4,492 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0066 over Big Bayou Sara?

The structure is 718 ft (218.8 m) long with a longest span of 103 ft (31.4 m) and a deck 28 ft wide.

Who owns LA0066 over Big Bayou Sara?

It is owned by the State Highway Agency.