US Bridges

US0090 over Drainage Ditch

Fair

St. Mary Parish, Louisiana · .95 MI E of LA 3215 · Structure no. 035104240517071

Built
1979
46 years old
Condition
Fair
inspected December 2023
Type
Culvert
Steel
Length
25 ft
4 main spans
Daily traffic
7,885
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over Drainage Ditch is a steel culvert carrying US0090 over Drainage Ditch in St. Mary Parish, Louisiana. It was built in 1979, so it is 46 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 7,885 vehicles a day, roughly 14% of them trucks, projected to reach 8,673 by 2041. The structure is 25 ft (7.6 m) long and 305 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesUS0090
CrossesDrainage Ditch
Location.95 MI E of LA 3215
RouteU.S. Route 90
CountySt. Mary Parish
StateLouisiana
Coordinates29.75261, -91.44979
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.5 US tons
Inventory rating63.6 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span5 ft (1.5 m)
Deck width305 ft (93 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,885 (2021)
Projected traffic8,673 by 2041
Trucks14%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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$333,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US0090 over Drainage Ditch built?

It was built in 1979, making it 46 years old in 2025.

What condition is US0090 over Drainage 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 December 2023.

How much traffic does US0090 over Drainage Ditch carry?

About 7,885 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is US0090 over Drainage Ditch?

The structure is 25 ft (7.6 m) long with a longest span of 5 ft (1.5 m) and a deck 305 ft wide.

Who owns US0090 over Drainage Ditch?

It is owned by the State Highway Agency.