US Bridges

I0020 Frontage RD over Drainage

Good

Madison Parish, Louisiana · 2.8 MI West of LA 577 · Structure no. 053304510800263

Built
1971
54 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
162
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 Frontage RD over Drainage is a prestressed concrete stringer/multi-beam or girder carrying I0020 Frontage RD over Drainage in Madison Parish, Louisiana. It was built in 1971, so it is 54 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.

It carries about 162 vehicles a day, roughly 15% of them trucks, projected to reach 178 by 2041. The structure is 55 ft (16.8 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI0020 Frontage RD
CrossesDrainage
Location2.8 MI West of LA 577
RouteInterstate 20
Coordinates32.43846, -91.46815
Functional classRural Major Collector

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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length55 ft (16.8 m)
Longest span55 ft (16.8 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic162 (2021)
Projected traffic178 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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$303,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I0020 Frontage RD over Drainage built?

It was built in 1971, making it 54 years old in 2025.

What condition is I0020 Frontage RD over Drainage 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 June 2023.

How much traffic does I0020 Frontage RD over Drainage carry?

About 162 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is I0020 Frontage RD over Drainage?

The structure is 55 ft (16.8 m) long with a longest span of 55 ft (16.8 m) and a deck 29 ft wide.

Who owns I0020 Frontage RD over Drainage?

It is owned by the State Highway Agency.