US Bridges

Johnson RD over Johnson Bayou

Good

Avoyelles Parish, Louisiana · 0.08 Mi. North of LA 1192 · Structure no. 080500000800123

Built
2009
16 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
21 ft
3 main spans
Daily traffic
400
2020 count
Owner
County
County Highway Agency

About this bridge

Johnson RD over Johnson Bayou is a concrete culvert carrying Johnson RD over Johnson Bayou in Avoyelles Parish, Louisiana. It was built in 2009, so it is 16 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 400 vehicles a day, projected to reach 440 by 2040. The structure is 21 ft (6.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesJohnson RD
CrossesJohnson Bayou
Location0.08 Mi. North of LA 1192
RouteCounty Highway 0
Coordinates31.19184, -92.0799
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span7 ft (2.1 m)
Deck width45 ft (13.7 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2020)
Projected traffic440 by 2040
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Johnson RD over Johnson Bayou built?

It was built in 2009, making it 16 years old in 2025.

What condition is Johnson RD over Johnson Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does Johnson RD over Johnson Bayou carry?

About 400 vehicles per day (2020 count).

How long is Johnson RD over Johnson Bayou?

The structure is 21 ft (6.4 m) long with a longest span of 7 ft (2.1 m) and a deck 45 ft wide.

Who owns Johnson RD over Johnson Bayou?

It is owned by the County Highway Agency.