US Bridges

Sligo Rd. over Big Bayou Sara

Good

West Feliciana Parish, Louisiana · 4.53 Mi. S.W. of US 61 · Structure no. 616300000616307

Built
2024
1 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
481 ft
12 main spans
Daily traffic
80
2020 count
Owner
County
County Highway Agency

About this bridge

Sligo Rd. over Big Bayou Sara is a concrete stringer/multi-beam or girder carrying Sligo Rd. over Big Bayou Sara in West Feliciana Parish, Louisiana. It was built in 2024, so it is 1 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 80 vehicles a day, projected to reach 88 by 2040. The structure is 481 ft (146.6 m) long and 26 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSligo Rd.
CrossesBig Bayou Sara
Location4.53 Mi. S.W. of US 61
RouteCounty Highway 0
CountyWest Feliciana Parish
StateLouisiana
Coordinates30.96464, -91.40668
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans12
Design loadGreater than HL 93
Structure length481 ft (146.6 m)
Longest span41 ft (12.5 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2020)
Projected traffic88 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Sligo Rd. over Big Bayou Sara built?

It was built in 2024, making it 1 years old in 2025.

What condition is Sligo Rd. over Big Bayou Sara in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Sligo Rd. over Big Bayou Sara carry?

About 80 vehicles per day (2020 count).

How long is Sligo Rd. over Big Bayou Sara?

The structure is 481 ft (146.6 m) long with a longest span of 41 ft (12.5 m) and a deck 26 ft wide.

Who owns Sligo Rd. over Big Bayou Sara?

It is owned by the County Highway Agency.