US Bridges

Gibbens RD over Cypress Bayou

Poor

East Baton Rouge Parish, Louisiana · 0.4 Mi. S of LA 423 · Structure no. 611730332910931

Built
1970
55 years old
Condition
Poor
inspected July 2023
Type
Slab
Concrete
Length
154 ft
8 main spans
Daily traffic
2,125
2019 count
Owner
County
County Highway Agency

About this bridge

Gibbens RD over Cypress Bayou is a concrete slab carrying Gibbens RD over Cypress Bayou in East Baton Rouge Parish, Louisiana. It was built in 1970, so it is 55 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 2,125 vehicles a day, projected to reach 2,337 by 2039. The structure is 154 ft (46.9 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGibbens RD
CrossesCypress Bayou
Location0.4 Mi. S of LA 423
RouteCounty Highway 0
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.55355, -91.15584
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans8
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span19 ft (5.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,125 (2019)
Projected traffic2,337 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Gibbens RD over Cypress Bayou built?

It was built in 1970, making it 55 years old in 2025.

What condition is Gibbens RD over Cypress 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 July 2023.

How much traffic does Gibbens RD over Cypress Bayou carry?

About 2,125 vehicles per day (2019 count).

How long is Gibbens RD over Cypress Bayou?

The structure is 154 ft (46.9 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns Gibbens RD over Cypress Bayou?

It is owned by the County Highway Agency.