US Bridges

W Robert Wilson RD over Drainage Bayou

Fair

Ascension Parish, Louisiana · 0.26 Miles North of LA.30 · Structure no. 610300000610362

Built
2016
9 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
120
2019 count
Owner
County
County Highway Agency

About this bridge

W Robert Wilson RD over Drainage Bayou is a concrete culvert carrying W Robert Wilson RD over Drainage Bayou in Ascension Parish, Louisiana. It was built in 2016, so it is 9 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 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 120 vehicles a day, projected to reach 132 by 2039. The structure is 22 ft (6.7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesW Robert Wilson RD
CrossesDrainage Bayou
Location0.26 Miles North of LA.30
RouteCounty Highway 0
CountyAscension Parish
StateLouisiana
Coordinates30.21438, -90.97101
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 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 rating43.2 US tons
Inventory rating33.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width32 ft (9.8 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2019)
Projected traffic132 by 2039
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was W Robert Wilson RD over Drainage Bayou built?

It was built in 2016, making it 9 years old in 2025.

What condition is W Robert Wilson 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 January 2023.

How much traffic does W Robert Wilson RD over Drainage Bayou carry?

About 120 vehicles per day (2019 count).

How long is W Robert Wilson RD over Drainage Bayou?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns W Robert Wilson RD over Drainage Bayou?

It is owned by the County Highway Agency.