US Bridges

Grammont ST over W Prong Youngs Bayou

FairPosted for load

Ouachita Parish, Louisiana · Grammont ST in Monro · Structure no. 053732307920591

Built
1970
55 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete
Length
36 ft
1 main span
Daily traffic
250
1980 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grammont ST over W Prong Youngs Bayou is a concrete slab carrying Grammont ST over W Prong Youngs Bayou in Ouachita 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 250 vehicles a day, projected to reach 275 by 2000. The structure is 36 ft (11 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesGrammont ST
CrossesW Prong Youngs Bayou
LocationGrammont ST in Monro
RouteCounty Highway 0
CountyOuachita Parish
StateLouisiana
Coordinates32.51046, -92.0997
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating16.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span31 ft (9.4 m)
Deck width32 ft (9.8 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (1980)
Projected traffic275 by 2000
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 byCity or Municipal 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 Grammont ST over W Prong Youngs Bayou built?

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

What condition is Grammont ST over W Prong Youngs 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 August 2024.

How much traffic does Grammont ST over W Prong Youngs Bayou carry?

About 250 vehicles per day (1980 count).

How long is Grammont ST over W Prong Youngs Bayou?

The structure is 36 ft (11 m) long with a longest span of 31 ft (9.4 m) and a deck 32 ft wide.

Who owns Grammont ST over W Prong Youngs Bayou?

It is owned by the City or Municipal Highway Agency.