US Bridges

I0020 over Dorcheat Bayou

Fair

Webster Parish, Louisiana · 0.84M East of LA 7 · Structure no. 046004510307182

Built
1960
65 years old, rebuilt 1993
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
600 ft
10 main spans
Daily traffic
38,625
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over Dorcheat Bayou is a prestressed concrete continuous stringer/multi-beam or girder carrying I0020 over Dorcheat Bayou in Webster Parish, Louisiana. It was built in 1960 and reconstructed in 1993, so it is 65 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 38,625 vehicles a day, roughly 19% of them trucks, projected to reach 42,487 by 2041. The structure is 600 ft (182.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI0020
CrossesDorcheat Bayou
Location0.84M East of LA 7
RouteInterstate 20
CountyWebster Parish
StateLouisiana
Coordinates32.59432, -93.3212
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length600 ft (182.9 m)
Longest span60 ft (18.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,625 (2021)
Projected traffic42,487 by 2041
Trucks19%
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 Dorcheat Bayou built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1993.

What condition is I0020 over Dorcheat 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 September 2023.

How much traffic does I0020 over Dorcheat Bayou carry?

About 38,625 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is I0020 over Dorcheat Bayou?

The structure is 600 ft (182.9 m) long with a longest span of 60 ft (18.3 m) and a deck 43 ft wide.

Who owns I0020 over Dorcheat Bayou?

It is owned by the State Highway Agency.