US Bridges

LA 135 over Muddy Bayou

Good

Richland Parish, Louisiana · 1.7 Mi. N. of LA 576 · Structure no. 054200000054203

Built
2020
5 years old
Condition
Good
inspected August 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
698
2021 count
Owner
State
State Highway Agency

About this bridge

LA 135 over Muddy Bayou is a concrete slab carrying LA 135 over Muddy Bayou in Richland Parish, Louisiana. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 698 vehicles a day, roughly 14% of them trucks, projected to reach 767 by 2041. The structure is 100 ft (30.5 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLA 135
CrossesMuddy Bayou
Location1.7 Mi. N. of LA 576
RouteState Highway 135
CountyRichland Parish
StateLouisiana
Coordinates32.25961, -91.86606
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating50.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadGreater than HL 93
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic698 (2021)
Projected traffic767 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 LA 135 over Muddy Bayou built?

It was built in 2020, making it 5 years old in 2025.

What condition is LA 135 over Muddy Bayou 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 August 2023.

How much traffic does LA 135 over Muddy Bayou carry?

About 698 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA 135 over Muddy Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 32 ft wide.

Who owns LA 135 over Muddy Bayou?

It is owned by the State Highway Agency.