US Bridges

I0020 over Saline Bayou

Fair

Bienville Parish, Louisiana · 6.4 MI W of LA 507 · Structure no. 040704510416452

Built
1963
62 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
37,514
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over Saline Bayou is a concrete culvert carrying I0020 over Saline Bayou in Bienville Parish, Louisiana. It was built in 1963, so it is 62 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 37,514 vehicles a day, roughly 36% of them trucks, projected to reach 41,265 by 2041. The structure is 26 ft (7.9 m) long and 154 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI0020
CrossesSaline Bayou
Location6.4 MI W of LA 507
RouteInterstate 20
Coordinates32.56045, -92.89512
Functional classRural Principal Arterial - Interstate

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span8 ft (2.4 m)
Deck width154 ft (46.9 m)
Roadway width139 ft (42.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,514 (2021)
Projected traffic41,265 by 2041
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I0020 over Saline Bayou built?

It was built in 1963, making it 62 years old in 2025.

What condition is I0020 over Saline Bayou 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 I0020 over Saline Bayou carry?

About 37,514 vehicles per day (2021 count), of which roughly 36% are trucks.

How long is I0020 over Saline Bayou?

The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m) and a deck 154 ft wide.

Who owns I0020 over Saline Bayou?

It is owned by the State Highway Agency.