US Bridges

LA0016 over Slough

Fair

Livingston Parish, Louisiana · 0.8 M N of LA 42 · Structure no. 623202620100861

Built
1974
51 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
77 ft
4 main spans
Daily traffic
10,070
2021 count
Owner
State
State Highway Agency

About this bridge

LA0016 over Slough is a concrete slab carrying LA0016 over Slough in Livingston Parish, Louisiana. It was built in 1974, so it is 51 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 5 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 10,070 vehicles a day, roughly 8% of them trucks, projected to reach 11,077 by 2041. The structure is 77 ft (23.5 m) long and 35 ft wide.

CarriesLA0016
CrossesSlough
Location0.8 M N of LA 42
RouteState Highway 16
Coordinates30.34387, -90.8468
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span19 ft (5.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,070 (2021)
Projected traffic11,077 by 2041
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 LA0016 over Slough built?

It was built in 1974, making it 51 years old in 2025.

What condition is LA0016 over Slough 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 April 2024.

How much traffic does LA0016 over Slough carry?

About 10,070 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is LA0016 over Slough?

The structure is 77 ft (23.5 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.

Who owns LA0016 over Slough?

It is owned by the State Highway Agency.