US Bridges

Carney RD over Bayou Baton Rouge

Poor

East Baton Rouge Parish, Louisiana · 0.2 M W of LA 964 · Structure no. 611730373911231

Built
1965
60 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
172 ft
9 main spans
Daily traffic
180
2023 count
Owner
County
County Highway Agency

About this bridge

Carney RD over Bayou Baton Rouge is a wood or timber stringer/multi-beam or girder carrying Carney RD over Bayou Baton Rouge in East Baton Rouge Parish, Louisiana. It was built in 1965, so it is 60 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 3 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 180 vehicles a day, projected to reach 198 by 2043. The structure is 172 ft (52.4 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCarney RD
CrossesBayou Baton Rouge
Location0.2 M W of LA 964
RouteCounty Highway 0
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.62157, -91.20535
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.3 US tons
Inventory rating18.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans9
Design loadH 10
Structure length172 ft (52.4 m)
Longest span19 ft (5.8 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2023)
Projected traffic198 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$550,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Carney RD over Bayou Baton Rouge built?

It was built in 1965, making it 60 years old in 2025.

What condition is Carney RD over Bayou Baton Rouge 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 November 2024.

How much traffic does Carney RD over Bayou Baton Rouge carry?

About 180 vehicles per day (2023 count).

How long is Carney RD over Bayou Baton Rouge?

The structure is 172 ft (52.4 m) long with a longest span of 19 ft (5.8 m) and a deck 25 ft wide.

Who owns Carney RD over Bayou Baton Rouge?

It is owned by the County Highway Agency.