US Bridges

I0020 over US71

Fair

Bossier Parish, Louisiana · 1.8 MI NW of LA 3032 · Structure no. 040804510201426

Built
1966
59 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
264 ft
4 main spans
Daily traffic
15,920
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 over US71 is a steel stringer/multi-beam or girder carrying I0020 over US71 in Bossier Parish, Louisiana. It was built in 1966, so it is 59 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 15,920 vehicles a day, roughly 8% of them trucks, projected to reach 17,512 by 2041. The structure is 264 ft (80.5 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesI0020
CrossesUS71
Location1.8 MI NW of LA 3032
RouteInterstate 20
CountyBossier Parish
StateLouisiana
Coordinates32.5134, -93.7155
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length264 ft (80.5 m)
Longest span70 ft (21.3 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic15,920 (2021)
Projected traffic17,512 by 2041
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 US71 built?

It was built in 1966, making it 59 years old in 2025.

What condition is I0020 over US71 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 US71 carry?

About 15,920 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is I0020 over US71?

The structure is 264 ft (80.5 m) long with a longest span of 70 ft (21.3 m) and a deck 35 ft wide.

Who owns I0020 over US71?

It is owned by the State Highway Agency.