US Bridges

Wyngate Blvd over 71st Street Ditch

Fair

Caddo Parish, Louisiana · 0.8 Mi.So. of LA 511 · Structure no. 040932259934641

Built
1956
69 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
162 ft
8 main spans
Daily traffic
2,200
1979 count
Owner
City
City or Municipal Highway Agency

About this bridge

Wyngate Blvd over 71st Street Ditch is a concrete slab carrying Wyngate Blvd over 71st Street Ditch in Caddo Parish, Louisiana. It was built in 1956, so it is 69 years old, older 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 2,200 vehicles a day, projected to reach 2,420 by 1999. The structure is 162 ft (49.4 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesWyngate Blvd
Crosses71st Street Ditch
Location0.8 Mi.So. of LA 511
RouteCounty Highway 0
CountyCaddo Parish
StateLouisiana
Coordinates32.43159, -93.77368
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 15
Structure length162 ft (49.4 m)
Longest span20 ft (6.1 m)
Deck width59 ft (17.9 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (1979)
Projected traffic2,420 by 1999
Trucks—
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$898,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyngate Blvd over 71st Street Ditch built?

It was built in 1956, making it 69 years old in 2025.

What condition is Wyngate Blvd over 71st Street Ditch 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 April 2023.

How much traffic does Wyngate Blvd over 71st Street Ditch carry?

About 2,200 vehicles per day (1979 count).

How long is Wyngate Blvd over 71st Street Ditch?

The structure is 162 ft (49.4 m) long with a longest span of 20 ft (6.1 m) and a deck 59 ft wide.

Who owns Wyngate Blvd over 71st Street Ditch?

It is owned by the City or Municipal Highway Agency.