US Bridges

Lower Zachary RD over Drainage Bayou

Good

East Baton Rouge Parish, Louisiana · 0.185 Mi. W. of LA 19 · Structure no. 611700000611707

Built
2019
6 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
80 ft
4 main spans
Daily traffic
4,570
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lower Zachary RD over Drainage Bayou is a concrete slab carrying Lower Zachary RD over Drainage Bayou in East Baton Rouge Parish, Louisiana. It was built in 2019, so it is 6 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,570 vehicles a day, projected to reach 5,027 by 2042. The structure is 80 ft (24.4 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLower Zachary RD
CrossesDrainage Bayou
Location0.185 Mi. W. of LA 19
RouteCounty Highway 0
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.64084, -91.15037
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating46.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadGreater than HL 93
Structure length80 ft (24.4 m)
Longest span20 ft (6.1 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,570 (2022)
Projected traffic5,027 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal 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 Lower Zachary RD over Drainage Bayou built?

It was built in 2019, making it 6 years old in 2025.

What condition is Lower Zachary RD over Drainage Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does Lower Zachary RD over Drainage Bayou carry?

About 4,570 vehicles per day (2022 count).

How long is Lower Zachary RD over Drainage Bayou?

The structure is 80 ft (24.4 m) long with a longest span of 20 ft (6.1 m) and a deck 31 ft wide.

Who owns Lower Zachary RD over Drainage Bayou?

It is owned by the City or Municipal Highway Agency and maintained by the County Highway Agency.