US Bridges

I0020 Service RD over Bayou Despair

Fair

Madison Parish, Louisiana · 6.0 MI West of US 65 · Structure no. 053304510810223

Built
1975
50 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
200 ft
8 main spans
Daily traffic
155
2021 count
Owner
State
State Highway Agency

About this bridge

I0020 Service RD over Bayou Despair is a concrete slab carrying I0020 Service RD over Bayou Despair in Madison Parish, Louisiana. It was built in 1975, so it is 50 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 6 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 155 vehicles a day, roughly 15% of them trucks, projected to reach 170 by 2041. The structure is 200 ft (61 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI0020 Service RD
CrossesBayou Despair
Location6.0 MI West of US 65
RouteInterstate 20
CountyMadison Parish
StateLouisiana
Coordinates32.41848, -91.298
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length200 ft (61 m)
Longest span25 ft (7.6 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic155 (2021)
Projected traffic170 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$897,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I0020 Service RD over Bayou Despair built?

It was built in 1975, making it 50 years old in 2025.

What condition is I0020 Service RD over Bayou Despair 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 June 2023.

How much traffic does I0020 Service RD over Bayou Despair carry?

About 155 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is I0020 Service RD over Bayou Despair?

The structure is 200 ft (61 m) long with a longest span of 25 ft (7.6 m) and a deck 29 ft wide.

Who owns I0020 Service RD over Bayou Despair?

It is owned by the State Highway Agency.