US Bridges

LA0576 over Muddy Bayou

FairPosted for load

Richland Parish, Louisiana · 6.0 MI South of LA 132 · Structure no. 054203410106081

Built
1968
57 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
77 ft
4 main spans
Daily traffic
162
2021 count
Owner
State
State Highway Agency

About this bridge

LA0576 over Muddy Bayou is a wood or timber stringer/multi-beam or girder carrying LA0576 over Muddy Bayou in Richland Parish, Louisiana. It was built in 1968, so it is 57 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. Its operating status is: posted for load restriction.

It carries about 162 vehicles a day, roughly 15% of them trucks, projected to reach 178 by 2041. The structure is 77 ft (23.5 m) long and 28 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLA0576
CrossesMuddy Bayou
Location6.0 MI South of LA 132
RouteState Highway 576
CountyRichland Parish
StateLouisiana
Coordinates32.23301, -91.879
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length77 ft (23.5 m)
Longest span19 ft (5.8 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic162 (2021)
Projected traffic178 by 2041
Trucks15%
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

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$397,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0576 over Muddy Bayou built?

It was built in 1968, making it 57 years old in 2025.

What condition is LA0576 over Muddy 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 September 2023.

How much traffic does LA0576 over Muddy Bayou carry?

About 162 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0576 over Muddy Bayou?

The structure is 77 ft (23.5 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns LA0576 over Muddy Bayou?

It is owned by the State Highway Agency.