US Bridges

LA0120 over Winn Creek

Fair

Natchitoches Parish, Louisiana · 6.8 Mi. E of Int LA487 · Structure no. 083500420510301

Built
1950
75 years old
Condition
Fair
inspected February 2024
Type
Slab
Concrete
Length
160 ft
8 main spans
Daily traffic
1,715
2021 count
Owner
State
State Highway Agency

About this bridge

LA0120 over Winn Creek is a concrete slab carrying LA0120 over Winn Creek in Natchitoches 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 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 1,715 vehicles a day, roughly 14% of them trucks, projected to reach 1,886 by 2041. The structure is 160 ft (48.8 m) long and 29 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesLA0120
CrossesWinn Creek
Location6.8 Mi. E of Int LA487
RouteState Highway 120
CountyNatchitoches Parish
StateLouisiana
Coordinates31.69219, -93.31
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating39 US tons
Inventory rating23 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadH 15
Structure length160 ft (48.8 m)
Longest span20 ft (6.1 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,715 (2021)
Projected traffic1,886 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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$741,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0120 over Winn Creek built?

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

What condition is LA0120 over Winn Creek 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 February 2024.

How much traffic does LA0120 over Winn Creek carry?

About 1,715 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0120 over Winn Creek?

The structure is 160 ft (48.8 m) long with a longest span of 20 ft (6.1 m) and a deck 29 ft wide.

Who owns LA0120 over Winn Creek?

It is owned by the State Highway Agency.