US Bridges

LA0091 over B. Plaq. Brule/Estherwoo

PoorPosted for load

Acadia Parish, Louisiana · 1.2 MI N of US 90 · Structure no. 030108010901171

Built
1975
50 years old
Condition
Poor
inspected May 2023
Type
Movable - Swing
Steel
Length
357 ft
10 main spans
Daily traffic
1,617
2021 count
Owner
State
State Highway Agency

About this bridge

LA0091 over B. Plaq. Brule/Estherwoo is a steel movable - swing carrying LA0091 over B. Plaq. Brule/Estherwoo in Acadia Parish, Louisiana. It was built in 1975, so it is 50 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 1,617 vehicles a day, roughly 13% of them trucks, projected to reach 1,778 by 2041. The structure is 357 ft (108.8 m) long and 27 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLA0091
CrossesB. Plaq. Brule/Estherwoo
Location1.2 MI N of US 90
RouteState Highway 91
CountyAcadia Parish
StateLouisiana
Coordinates30.19739, -92.46344
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating17.2 US tons
Inventory rating13.2 US tons

Structure

Structure typeMovable - Swing
MaterialSteel
DeckSteel plate
Main spans10 (+9 approach)
Design loadHS 20
Structure length357 ft (108.8 m)
Longest span162 ft (49.4 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deck21 ft (6.3 m)

Traffic and service

Average daily traffic1,617 (2021)
Projected traffic1,778 by 2041
Trucks13%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was LA0091 over B. Plaq. Brule/Estherwoo built?

It was built in 1975, making it 50 years old in 2025.

What condition is LA0091 over B. Plaq. Brule/Estherwoo in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does LA0091 over B. Plaq. Brule/Estherwoo carry?

About 1,617 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA0091 over B. Plaq. Brule/Estherwoo?

The structure is 357 ft (108.8 m) long with a longest span of 162 ft (49.4 m) and a deck 27 ft wide.

Who owns LA0091 over B. Plaq. Brule/Estherwoo?

It is owned by the State Highway Agency.