US Bridges

LA1166 over Bayou Marron

Fair

Evangeline Parish, Louisiana · 1.45 MI North of LA 1165 · Structure no. 032008202101451

Built
1974
51 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
193
2022 count
Owner
State
State Highway Agency

About this bridge

LA1166 over Bayou Marron is a concrete slab carrying LA1166 over Bayou Marron in Evangeline Parish, Louisiana. It was built in 1974, so it is 51 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 193 vehicles a day, roughly 15% of them trucks, projected to reach 212 by 2042. The structure is 76 ft (23.2 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLA1166
CrossesBayou Marron
Location1.45 MI North of LA 1165
RouteState Highway 1166
Coordinates30.60888, -92.27576
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic193 (2022)
Projected traffic212 by 2042
Trucks15%
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

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 LA1166 over Bayou Marron built?

It was built in 1974, making it 51 years old in 2025.

What condition is LA1166 over Bayou Marron 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 May 2023.

How much traffic does LA1166 over Bayou Marron carry?

About 193 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is LA1166 over Bayou Marron?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA1166 over Bayou Marron?

It is owned by the State Highway Agency.