US Bridges

I0310 over Ramps/Rr/Canal/Us 61

Fair

St. Charles Parish, Louisiana · 0.10 M North of US 61 · Structure no. 024504503603505

Built
1992
33 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
6,000 ft
70 main spans
Daily traffic
15,642
2021 count
Owner
State
State Highway Agency

About this bridge

I0310 over Ramps/Rr/Canal/Us 61 is a prestressed concrete continuous stringer/multi-beam or girder carrying I0310 over Ramps/Rr/Canal/Us 61 in St. Charles Parish, Louisiana. It was built in 1992, so it is 33 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 15,642 vehicles a day, roughly 25% of them trucks, projected to reach 17,206 by 2041. The structure is 6,000 ft (1,828.8 m) long and 28 ft wide.

Location

Open in Google Maps
CarriesI0310
CrossesRamps/Rr/Canal/Us 61
Location0.10 M North of US 61
RouteInterstate 310
CountySt. Charles Parish
StateLouisiana
Coordinates29.97315, -90.31066
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans70 (+12 approach)
Design loadHS 20
Structure length6,000 ft (1,828.8 m)
Longest span116 ft (35.4 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic15,642 (2021)
Projected traffic17,206 by 2041
Trucks25%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I0310 over Ramps/Rr/Canal/Us 61 built?

It was built in 1992, making it 33 years old in 2025.

What condition is I0310 over Ramps/Rr/Canal/Us 61 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 October 2023.

How much traffic does I0310 over Ramps/Rr/Canal/Us 61 carry?

About 15,642 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0310 over Ramps/Rr/Canal/Us 61?

The structure is 6,000 ft (1,828.8 m) long with a longest span of 116 ft (35.4 m) and a deck 28 ft wide.

Who owns I0310 over Ramps/Rr/Canal/Us 61?

It is owned by the State Highway Agency.