US Bridges

LA0928 over Jim Bayou

Poor

Ascension Parish, Louisiana · 1.5 Miles SW of LA 427 · Structure no. 610308030704191

Built
1966
59 years old
Condition
Poor
inspected May 2023
Type
Culvert
Concrete
Length
38 ft
5 main spans
Daily traffic
5,446
2021 count
Owner
State
State Highway Agency

About this bridge

LA0928 over Jim Bayou is a concrete culvert carrying LA0928 over Jim Bayou in Ascension Parish, Louisiana. It was built in 1966, so it is 59 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.

It carries about 5,446 vehicles a day, roughly 11% of them trucks, projected to reach 5,990 by 2041. The structure is 38 ft (11.6 m) long and 50 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA0928
CrossesJim Bayou
Location1.5 Miles SW of LA 427
RouteState Highway 928
CountyAscension Parish
StateLouisiana
Coordinates30.30756, -91.00321
Functional classUrban 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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82.9 US tons
Inventory rating63.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadH 15
Structure length38 ft (11.6 m)
Longest span7 ft (2.1 m)
Deck width50 ft (15.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,446 (2021)
Projected traffic5,990 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$229,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0928 over Jim Bayou built?

It was built in 1966, making it 59 years old in 2025.

What condition is LA0928 over Jim Bayou 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 LA0928 over Jim Bayou carry?

About 5,446 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0928 over Jim Bayou?

The structure is 38 ft (11.6 m) long with a longest span of 7 ft (2.1 m) and a deck 50 ft wide.

Who owns LA0928 over Jim Bayou?

It is owned by the State Highway Agency.