US Bridges

US0011 over Bayou Potassay

Fair

St. Tammany Parish, Louisiana · 0.2 M N of LA 433 · Structure no. 625200180304811

Built
1951
74 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
15,201
2021 count
Owner
State
State Highway Agency

About this bridge

US0011 over Bayou Potassay is a concrete slab carrying US0011 over Bayou Potassay in St. Tammany Parish, Louisiana. It was built in 1951, so it is 74 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 15,201 vehicles a day, roughly 8% of them trucks, projected to reach 16,721 by 2041. The structure is 60 ft (18.3 m) long and 64 ft wide.

Location

Open in Google Maps
CarriesUS0011
CrossesBayou Potassay
Location0.2 M N of LA 433
RouteU.S. Route 11
CountySt. Tammany Parish
StateLouisiana
Coordinates30.2719, -89.7861
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width64 ft (19.5 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,201 (2021)
Projected traffic16,721 by 2041
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US0011 over Bayou Potassay built?

It was built in 1951, making it 74 years old in 2025.

What condition is US0011 over Bayou Potassay 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 September 2023.

How much traffic does US0011 over Bayou Potassay carry?

About 15,201 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is US0011 over Bayou Potassay?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 64 ft wide.

Who owns US0011 over Bayou Potassay?

It is owned by the State Highway Agency.