US Bridges

Harmon Johnson RD over Drain to Prairie Bayou

Poor

Ouachita Parish, Louisiana · 2.2 Mi. E. U.S. Hwy. · Structure no. 053732237920471

Built
1968
57 years old
Condition
Poor
inspected March 2024
Type
Culvert
Steel
Length
20 ft
2 main spans
Daily traffic
570
1977 count
Owner
County
County Highway Agency

About this bridge

Harmon Johnson RD over Drain to Prairie Bayou is a steel culvert carrying Harmon Johnson RD over Drain to Prairie Bayou in Ouachita Parish, Louisiana. It was built in 1968, so it is 57 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, temporary structure in place while original is closed.

It carries about 570 vehicles a day, projected to reach 627 by 1997. The structure is 20 ft (6.1 m) long and 54 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesHarmon Johnson RD
CrossesDrain to Prairie Bayou
Location2.2 Mi. E. U.S. Hwy.
RouteCounty Highway 0
Coordinates32.39741, -92.07335
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert0 FailedOut of service and beyond corrective action.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, temporary structure in place while original is closed
ScourFoundations stable; scour above top of footing
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width54 ft (16.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic570 (1977)
Projected traffic627 by 1997
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$108,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Harmon Johnson RD over Drain to Prairie Bayou built?

It was built in 1968, making it 57 years old in 2025.

What condition is Harmon Johnson RD over Drain to Prairie Bayou in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Harmon Johnson RD over Drain to Prairie Bayou carry?

About 570 vehicles per day (1977 count).

How long is Harmon Johnson RD over Drain to Prairie Bayou?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m) and a deck 54 ft wide.

Who owns Harmon Johnson RD over Drain to Prairie Bayou?

It is owned by the County Highway Agency.