US Bridges

I0020 over Black Lake Creek

Fair

Bienville Parish, Louisiana · 1.3 MI East of LA 154 · Structure no. 040704510407391

Built
1964
61 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
51 ft
4 main spans
Daily traffic
37,514
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over Black Lake Creek is a concrete culvert carrying I0020 over Black Lake Creek in Bienville Parish, Louisiana. It was built in 1964, so it is 61 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 51 ft (15.5 m) long and 100 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesI0020
CrossesBlack Lake Creek
Location1.3 MI East of LA 154
RouteInterstate 20
Coordinates32.56319, -93.0489
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum 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 spans4
Design loadHS 20
Structure length51 ft (15.5 m)
Longest span10 ft (3 m)
Deck width100 ft (30.5 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,514 (2021)
Projected traffic41,265 by 2041
Trucks36%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Black Lake Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is I0020 over Black Lake 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 April 2024.

How much traffic does I0020 over Black Lake Creek carry?

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

How long is I0020 over Black Lake Creek?

The structure is 51 ft (15.5 m) long with a longest span of 10 ft (3 m) and a deck 100 ft wide.

Who owns I0020 over Black Lake Creek?

It is owned by the State Highway Agency.