US Bridges

Keithvil-Kingston over Cypress Bayou

Fair

Caddo Parish, Louisiana · 1.7 Miles East of US 171 · Structure no. 040932200934791

Built
2007
18 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

Keithvil-Kingston over Cypress Bayou is a concrete slab carrying Keithvil-Kingston over Cypress Bayou in Caddo Parish, Louisiana. It was built in 2007, so it is 18 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, projected to reach 110 by 2039. The structure is 100 ft (30.5 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKeithvil-Kingston
CrossesCypress Bayou
Location1.7 Miles East of US 171
RouteCounty Highway 0
CountyCaddo Parish
StateLouisiana
Coordinates32.33325, -93.79932
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.1 US tons
Inventory rating44.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.1 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic110 by 2039
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Keithvil-Kingston over Cypress Bayou built?

It was built in 2007, making it 18 years old in 2025.

What condition is Keithvil-Kingston over Cypress Bayou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Keithvil-Kingston over Cypress Bayou carry?

About 100 vehicles per day (2019 count).

How long is Keithvil-Kingston over Cypress Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Keithvil-Kingston over Cypress Bayou?

It is owned by the County Highway Agency.