US Bridges

I0020 over I20;RAMP S4

GoodClosed to traffic

Ouachita Parish, Louisiana · 2.0 MI East of LA 34 · Structure no. 053704510618365

Built
1965
60 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
742 ft
9 main spans
Daily traffic
15,642
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over I20;RAMP S4 is a steel stringer/multi-beam or girder carrying I0020 over I20;RAMP S4 in Ouachita Parish, Louisiana. It was built in 1965, so it is 60 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: closed to all traffic.

It carries about 15,642 vehicles a day, roughly 25% of them trucks, projected to reach 17,206 by 2041. The structure is 742 ft (226.2 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI0020
CrossesI20;RAMP S4
Location2.0 MI East of LA 34
RouteInterstate 20
CountyOuachita Parish
StateLouisiana
Coordinates32.49906, -92.1104
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length742 ft (226.2 m)
Longest span70 ft (21.3 m)
Deck width22 ft (6.6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,642 (2021)
Projected traffic17,206 by 2041
Trucks25%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I0020 over I20;RAMP S4 built?

It was built in 1965, making it 60 years old in 2025.

What condition is I0020 over I20;RAMP S4 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does I0020 over I20;RAMP S4 carry?

About 15,642 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0020 over I20;RAMP S4?

The structure is 742 ft (226.2 m) long with a longest span of 70 ft (21.3 m) and a deck 22 ft wide.

Who owns I0020 over I20;RAMP S4?

It is owned by the State Highway Agency.