US Bridges

Neff LN over Drainage Bayou

Poor

East Baton Rouge Parish, Louisiana · 3.1 Mi.Ene LA64 LA67 · Structure no. 611730394910321

Built
1965
60 years old
Condition
Poor
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
37 ft
3 main spans
Daily traffic
22
2019 count
Owner
County
County Highway Agency

About this bridge

Neff LN over Drainage Bayou is a wood or timber stringer/multi-beam or girder carrying Neff LN 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.

It carries about 22 vehicles a day, projected to reach 24 by 2039. The structure is 37 ft (11.3 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesNeff LN
CrossesDrainage Bayou
Location3.1 Mi.Ene LA64 LA67
RouteCounty Highway 0
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.65618, -91.05321
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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.7 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length37 ft (11.3 m)
Longest span18 ft (5.5 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22 (2019)
Projected traffic24 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Neff LN over Drainage Bayou built?

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

What condition is Neff LN 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 Neff LN over Drainage Bayou carry?

About 22 vehicles per day (2019 count).

How long is Neff LN over Drainage Bayou?

The structure is 37 ft (11.3 m) long with a longest span of 18 ft (5.5 m) and a deck 25 ft wide.

Who owns Neff LN over Drainage Bayou?

It is owned by the County Highway Agency.