US Bridges

Brian RD over Drainage Bayou

PoorPosted for load

East Baton Rouge Parish, Louisiana · 2.6 MI N.Jct LA 64 L · Structure no. 611730416911211

Built
1965
60 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
58 ft
3 main spans
Daily traffic
197
2023 count
Owner
County
County Highway Agency

About this bridge

Brian RD over Drainage Bayou is a wood or timber stringer/multi-beam or girder carrying Brian RD over Drainage Bayou 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 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. Its operating status is: posted for load restriction.

It carries about 197 vehicles a day, projected to reach 216 by 2043. The structure is 58 ft (17.7 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesBrian RD
CrossesDrainage Bayou
Location2.6 MI N.Jct LA 64 L
RouteCounty Highway 0
Coordinates30.69232, -91.20222
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.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating31.7 US tons
Inventory rating24.7 US tons

Structure

MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length58 ft (17.7 m)
Longest span17 ft (5.2 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic197 (2023)
Projected traffic216 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$220,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Brian RD over Drainage Bayou built?

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

What condition is Brian RD over Drainage 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 December 2023.

How much traffic does Brian RD over Drainage Bayou carry?

About 197 vehicles per day (2023 count).

How long is Brian RD over Drainage Bayou?

The structure is 58 ft (17.7 m) long with a longest span of 17 ft (5.2 m) and a deck 25 ft wide.

Who owns Brian RD over Drainage Bayou?

It is owned by the County Highway Agency.