US Bridges

Oliver RD over Big Four Ditch

Fair

Vermilion Parish, Louisiana · 1.36 Mi. W of LA 332 · Structure no. 035729590923521

Built
1960
65 years old
Condition
Fair
inspected July 2023
Type
Channel Beam
Concrete
Length
50 ft
2 main spans
Daily traffic
80
2022 count
Owner
County
County Highway Agency

About this bridge

Oliver RD over Big Four Ditch is a concrete channel beam carrying Oliver RD over Big Four Ditch in Vermilion Parish, Louisiana. It was built in 1960, so it is 65 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 80 vehicles a day, projected to reach 88 by 2042. The structure is 50 ft (15.2 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOliver RD
CrossesBig Four Ditch
Location1.36 Mi. W of LA 332
RouteCounty Highway 0
CountyVermilion Parish
StateLouisiana
Coordinates29.98466, -92.58697
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span25 ft (7.6 m)
Deck width22 ft (6.7 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2022)
Projected traffic88 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Oliver RD over Big Four Ditch built?

It was built in 1960, making it 65 years old in 2025.

What condition is Oliver RD over Big Four Ditch 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 July 2023.

How much traffic does Oliver RD over Big Four Ditch carry?

About 80 vehicles per day (2022 count).

How long is Oliver RD over Big Four Ditch?

The structure is 50 ft (15.2 m) long with a longest span of 25 ft (7.6 m) and a deck 22 ft wide.

Who owns Oliver RD over Big Four Ditch?

It is owned by the County Highway Agency.