US Bridges

I0020 over Clarke Bayou

Fair

Bossier Parish, Louisiana · 0.5 MI East of US 80 · Structure no. 040804510216082

Built
1975
50 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete
Length
181 ft
9 main spans
Daily traffic
25,379
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over Clarke Bayou is a concrete slab carrying I0020 over Clarke Bayou in Bossier 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 25,379 vehicles a day, roughly 36% of them trucks, projected to reach 27,916 by 2041. The structure is 181 ft (55.2 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI0020
CrossesClarke Bayou
Location0.5 MI East of US 80
RouteInterstate 20
CountyBossier Parish
StateLouisiana
Coordinates32.57183, -93.4853
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length181 ft (55.2 m)
Longest span20 ft (6.1 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,379 (2021)
Projected traffic27,916 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 Clarke Bayou built?

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

What condition is I0020 over Clarke 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 November 2023.

How much traffic does I0020 over Clarke Bayou carry?

About 25,379 vehicles per day (2021 count), of which roughly 36% are trucks.

How long is I0020 over Clarke Bayou?

The structure is 181 ft (55.2 m) long with a longest span of 20 ft (6.1 m) and a deck 42 ft wide.

Who owns I0020 over Clarke Bayou?

It is owned by the State Highway Agency.