US Bridges

LA0015 over Muddy Bayou

Fair

Richland Parish, Louisiana · 4.03 MI West of LA 137 · Structure no. 054200260904031

Built
1938
87 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
28 ft
6 main spans
Daily traffic
2,198
2021 count
Owner
State
State Highway Agency

About this bridge

LA0015 over Muddy Bayou is a concrete culvert carrying LA0015 over Muddy Bayou in Richland Parish, Louisiana. It was built in 1938, so it is 87 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.

It carries about 2,198 vehicles a day, roughly 16% of them trucks, projected to reach 2,417 by 2041. The structure is 28 ft (8.5 m) long and 49 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0015
CrossesMuddy Bayou
Location4.03 MI West of LA 137
RouteState Highway 15
CountyRichland Parish
StateLouisiana
Coordinates32.35639, -91.844
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans6
Design loadH 15
Structure length28 ft (8.5 m)
Longest span4 ft (1.2 m)
Deck width49 ft (14.9 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,198 (2021)
Projected traffic2,417 by 2041
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 LA0015 over Muddy Bayou built?

It was built in 1938, making it 87 years old in 2025.

What condition is LA0015 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 July 2023.

How much traffic does LA0015 over Muddy Bayou carry?

About 2,198 vehicles per day (2021 count), of which roughly 16% are trucks.

How long is LA0015 over Muddy Bayou?

The structure is 28 ft (8.5 m) long with a longest span of 4 ft (1.2 m) and a deck 49 ft wide.

Who owns LA0015 over Muddy Bayou?

It is owned by the State Highway Agency.