US Bridges

LA0128 over Muddy Bayou Bridge

Good

Franklin Parish, Louisiana · 1.20 M W of LA 4 · Structure no. 582101700203911

Built
1996
29 years old
Condition
Good
inspected October 2024
Type
Culvert
Steel
Length
31 ft
1 main span
Daily traffic
906
2021 count
Owner
State
State Highway Agency

About this bridge

LA0128 over Muddy Bayou Bridge is a steel culvert carrying LA0128 over Muddy Bayou Bridge in Franklin Parish, Louisiana. It was built in 1996, so it is 29 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 906 vehicles a day, roughly 21% of them trucks, projected to reach 996 by 2041. The structure is 31 ft (9.4 m) long and 97 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesLA0128
CrossesMuddy Bayou Bridge
Location1.20 M W of LA 4
RouteState Highway 128
Coordinates32.08533, -91.6137
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating82.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width97 ft (29.6 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic906 (2021)
Projected traffic996 by 2041
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was LA0128 over Muddy Bayou Bridge built?

It was built in 1996, making it 29 years old in 2025.

What condition is LA0128 over Muddy Bayou Bridge 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 October 2024.

How much traffic does LA0128 over Muddy Bayou Bridge carry?

About 906 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0128 over Muddy Bayou Bridge?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m) and a deck 97 ft wide.

Who owns LA0128 over Muddy Bayou Bridge?

It is owned by the State Highway Agency.