US Bridges

S. Westport Dr. over Drainage Canal

Fair

West Baton Rouge Parish, Louisiana · 1.38 Mi. E. of LA 415 · Structure no. 616100000616103

Built
1970
55 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
28 ft
3 main spans
Daily traffic
3,500
2022 count
Owner
County
County Highway Agency

About this bridge

S. Westport Dr. over Drainage Canal is a concrete culvert carrying S. Westport Dr. over Drainage Canal in West Baton Rouge Parish, Louisiana. It was built in 1970, so it is 55 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 3,500 vehicles a day, projected to reach 3,850 by 2042. The structure is 28 ft (8.5 m) long and 90 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS. Westport Dr.
CrossesDrainage Canal
Location1.38 Mi. E. of LA 415
RouteCounty Highway 0
CountyWest Baton Rouge Parish
StateLouisiana
Coordinates30.44199, -91.22342
Functional classRural Minor 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.2 US tons
Inventory rating67.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span8 ft (2.4 m)
Deck width90 ft (27.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2022)
Projected traffic3,850 by 2042
Trucks—
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

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 S. Westport Dr. over Drainage Canal built?

It was built in 1970, making it 55 years old in 2025.

What condition is S. Westport Dr. over Drainage Canal 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 2024.

How much traffic does S. Westport Dr. over Drainage Canal carry?

About 3,500 vehicles per day (2022 count).

How long is S. Westport Dr. over Drainage Canal?

The structure is 28 ft (8.5 m) long with a longest span of 8 ft (2.4 m) and a deck 90 ft wide.

Who owns S. Westport Dr. over Drainage Canal?

It is owned by the County Highway Agency.