US Bridges

US0090 over Franklin Canal

Fair

St. Mary Parish, Louisiana · 4.50 MI W of LA 3215 · Structure no. 035104240511602

Built
1979
46 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
3,264 ft
1 main span
Daily traffic
10,063
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over Franklin Canal is a steel stringer/multi-beam or girder carrying US0090 over Franklin Canal in St. Mary Parish, Louisiana. It was built in 1979, so it is 46 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.

It carries about 10,063 vehicles a day, roughly 14% of them trucks, projected to reach 11,069 by 2041. The structure is 3,264 ft (994.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0090
CrossesFranklin Canal
Location4.50 MI W of LA 3215
RouteU.S. Route 90
CountySt. Mary Parish
StateLouisiana
Coordinates29.78245, -91.52062
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection8 Very GoodNo problems noted.
Last inspectionMarch 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+48 approach)
Design loadHS 20
Structure length3,264 ft (994.9 m)
Longest span175 ft (53.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,063 (2021)
Projected traffic11,069 by 2041
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was US0090 over Franklin Canal built?

It was built in 1979, making it 46 years old in 2025.

What condition is US0090 over Franklin Canal 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 US0090 over Franklin Canal carry?

About 10,063 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is US0090 over Franklin Canal?

The structure is 3,264 ft (994.9 m) long with a longest span of 175 ft (53.3 m) and a deck 43 ft wide.

Who owns US0090 over Franklin Canal?

It is owned by the State Highway Agency.