US Bridges

Louis White RD over Drainage Bayou

FairPosted for load

Ascension Parish, Louisiana · 1.2 MI SW Dutchtown · Structure no. 610330146910041

Built
1989
36 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
3 main spans
Daily traffic
10
2019 count
Owner
County
County Highway Agency

About this bridge

Louis White RD over Drainage Bayou is a wood or timber stringer/multi-beam or girder carrying Louis White RD over Drainage Bayou in Ascension Parish, Louisiana. It was built in 1989, so it is 36 years old, younger 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. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, projected to reach 11 by 2039. The structure is 38 ft (11.6 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLouis White RD
CrossesDrainage Bayou
Location1.2 MI SW Dutchtown
RouteCounty Highway 0
CountyAscension Parish
StateLouisiana
Coordinates30.24199, -91.00604
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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating32.5 US tons
Inventory rating23.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 15
Structure length38 ft (11.6 m)
Longest span17 ft (5.2 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2019)
Projected traffic11 by 2039
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Louis White RD over Drainage Bayou built?

It was built in 1989, making it 36 years old in 2025.

What condition is Louis White RD over Drainage Bayou 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 February 2023.

How much traffic does Louis White RD over Drainage Bayou carry?

About 10 vehicles per day (2019 count).

How long is Louis White RD over Drainage Bayou?

The structure is 38 ft (11.6 m) long with a longest span of 17 ft (5.2 m) and a deck 16 ft wide.

Who owns Louis White RD over Drainage Bayou?

It is owned by the County Highway Agency.