US Bridges

I0020 over Drainage-Canal

Fair

Madison Parish, Louisiana · 5.5 MI East of LA 577 · Structure no. 053304510808161

Built
1975
50 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
35 ft
4 main spans
Daily traffic
31,481
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over Drainage-Canal is a concrete culvert carrying I0020 over Drainage-Canal in Madison Parish, Louisiana. It was built in 1975, so it is 50 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 31,481 vehicles a day, roughly 37% of them trucks, projected to reach 34,629 by 2041. The structure is 35 ft (10.7 m) long and 206 ft wide. If it were closed, the detour would be 60.9 mi (98 km).

Location

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CarriesI0020
CrossesDrainage-Canal
Location5.5 MI East of LA 577
RouteInterstate 20
CountyMadison Parish
StateLouisiana
Coordinates32.42183, -91.3341
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span8 ft (2.4 m)
Deck width206 ft (62.8 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,481 (2021)
Projected traffic34,629 by 2041
Trucks37%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.9 mi (98 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 Drainage-Canal built?

It was built in 1975, making it 50 years old in 2025.

What condition is I0020 over Drainage-Canal 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 June 2023.

How much traffic does I0020 over Drainage-Canal carry?

About 31,481 vehicles per day (2021 count), of which roughly 37% are trucks.

How long is I0020 over Drainage-Canal?

The structure is 35 ft (10.7 m) long with a longest span of 8 ft (2.4 m) and a deck 206 ft wide.

Who owns I0020 over Drainage-Canal?

It is owned by the State Highway Agency.