US Bridges

LA0004 over Ash Slough Canal

Fair

Franklin Parish, Louisiana · .4 MI South of LA 865 · Structure no. 582100360307811

Built
1950
75 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
28 ft
3 main spans
Daily traffic
1,701
2021 count
Owner
State
State Highway Agency

About this bridge

LA0004 over Ash Slough Canal is a concrete culvert carrying LA0004 over Ash Slough Canal in Franklin Parish, Louisiana. It was built in 1950, so it is 75 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 1,701 vehicles a day, roughly 21% of them trucks, projected to reach 1,871 by 2041. The structure is 28 ft (8.5 m) long and 61 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesLA0004
CrossesAsh Slough Canal
Location.4 MI South of LA 865
RouteState Highway 4
CountyFranklin Parish
StateLouisiana
Coordinates32.13961, -91.7357
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length28 ft (8.5 m)
Longest span9 ft (2.7 m)
Deck width61 ft (18.6 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,701 (2021)
Projected traffic1,871 by 2041
Trucks21%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0004 over Ash Slough Canal built?

It was built in 1950, making it 75 years old in 2025.

What condition is LA0004 over Ash Slough Canal 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 October 2023.

How much traffic does LA0004 over Ash Slough Canal carry?

About 1,701 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0004 over Ash Slough Canal?

The structure is 28 ft (8.5 m) long with a longest span of 9 ft (2.7 m) and a deck 61 ft wide.

Who owns LA0004 over Ash Slough Canal?

It is owned by the State Highway Agency.