US Bridges

St. Claire Rd. over St. Clair Bayou

Fair

Lafayette Parish, Louisiana · 1.4 MI W of Sawmill HWY · Structure no. 032830181915771

Built
1986
39 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
95 ft
5 main spans
Daily traffic
720
2020 count
Owner
County
County Highway Agency

About this bridge

St. Claire Rd. over St. Clair Bayou is a concrete slab carrying St. Claire Rd. over St. Clair Bayou in Lafayette Parish, Louisiana. It was built in 1986, so it is 39 years old, younger 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 720 vehicles a day, projected to reach 792 by 2040. The structure is 95 ft (29 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSt. Claire Rd.
CrossesSt. Clair Bayou
Location1.4 MI W of Sawmill HWY
RouteCounty Highway 0
CountyLafayette Parish
StateLouisiana
Coordinates30.30396, -91.97703
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length95 ft (29 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic720 (2020)
Projected traffic792 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 St. Claire Rd. over St. Clair Bayou built?

It was built in 1986, making it 39 years old in 2025.

What condition is St. Claire Rd. over St. Clair 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 October 2023.

How much traffic does St. Claire Rd. over St. Clair Bayou carry?

About 720 vehicles per day (2020 count).

How long is St. Claire Rd. over St. Clair Bayou?

The structure is 95 ft (29 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns St. Claire Rd. over St. Clair Bayou?

It is owned by the County Highway Agency.