US Bridges

Patterson RD over Bayou

Poor

Jefferson Davis Parish, Louisiana · 1.3 MI N of Atterberry RD · Structure no. 072730196925471

Built
1980
45 years old
Condition
Poor
inspected October 2024
Type
Channel Beam
Prestressed Concrete
Length
40 ft
2 main spans
Daily traffic
350
2019 count
Owner
County
County Highway Agency

About this bridge

Patterson RD over Bayou is a prestressed concrete channel beam carrying Patterson RD over Bayou in Jefferson Davis Parish, Louisiana. It was built in 1980, so it is 45 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 4 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.

It carries about 350 vehicles a day, projected to reach 385 by 2039. The structure is 40 ft (12.2 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPatterson RD
CrossesBayou
Location1.3 MI N of Atterberry RD
RouteCounty Highway 0
CountyJefferson Davis Parish
StateLouisiana
Coordinates30.32606, -92.91178
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating18.2 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2019)
Projected traffic385 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Patterson RD over Bayou built?

It was built in 1980, making it 45 years old in 2025.

What condition is Patterson RD over 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 October 2024.

How much traffic does Patterson RD over Bayou carry?

About 350 vehicles per day (2019 count).

How long is Patterson RD over Bayou?

The structure is 40 ft (12.2 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Patterson RD over Bayou?

It is owned by the County Highway Agency.