US Bridges

I0020 over Marshall St/La 1/RRS.

Poor

Caddo Parish, Louisiana · I-20 over LA 1 · Structure no. 040904510118982

Built
1965
60 years old
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,837 ft
18 main spans
Daily traffic
98,318
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over Marshall St/La 1/RRS. is a steel continuous stringer/multi-beam or girder carrying I0020 over Marshall St/La 1/RRS. in Caddo 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 98,318 vehicles a day, roughly 19% of them trucks, projected to reach 108,149 by 2041. The structure is 1,837 ft (559.9 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI0020
CrossesMarshall St/La 1/RRS.
LocationI-20 over LA 1
RouteInterstate 20
CountyCaddo Parish
StateLouisiana
Coordinates32.51125, -93.7409
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20
Structure length1,837 ft (559.9 m)
Longest span134 ft (40.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98,318 (2021)
Projected traffic108,149 by 2041
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$7.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I0020 over Marshall St/La 1/RRS. built?

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

What condition is I0020 over Marshall St/La 1/RRS. in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does I0020 over Marshall St/La 1/RRS. carry?

About 98,318 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is I0020 over Marshall St/La 1/RRS.?

The structure is 1,837 ft (559.9 m) long with a longest span of 134 ft (40.8 m) and a deck 31 ft wide.

Who owns I0020 over Marshall St/La 1/RRS.?

It is owned by the State Highway Agency.