US Bridges

LA0156 over Bayou Terry

Fair

Natchitoches Parish, Louisiana · 1.1 Mi. E of Int LA9 · Structure no. 083500920101141

Built
1956
69 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
27 ft
4 main spans
Daily traffic
825
2021 count
Owner
State
State Highway Agency

About this bridge

LA0156 over Bayou Terry is a concrete culvert carrying LA0156 over Bayou Terry in Natchitoches Parish, Louisiana. It was built in 1956, so it is 69 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 825 vehicles a day, roughly 14% of them trucks, projected to reach 907 by 2041. The structure is 27 ft (8.2 m) long and 38 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA0156
CrossesBayou Terry
Location1.1 Mi. E of Int LA9
RouteState Highway 156
CountyNatchitoches Parish
StateLouisiana
Coordinates31.97101, -93.0319
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 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
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length27 ft (8.2 m)
Longest span6 ft (1.8 m)
Deck width38 ft (11.6 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic825 (2021)
Projected traffic907 by 2041
Trucks14%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0156 over Bayou Terry built?

It was built in 1956, making it 69 years old in 2025.

What condition is LA0156 over Bayou Terry 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 January 2024.

How much traffic does LA0156 over Bayou Terry carry?

About 825 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0156 over Bayou Terry?

The structure is 27 ft (8.2 m) long with a longest span of 6 ft (1.8 m) and a deck 38 ft wide.

Who owns LA0156 over Bayou Terry?

It is owned by the State Highway Agency.