US Bridges

I0310 over M. P. RR

Fair

St. Charles Parish, Louisiana · 4.9 MI S of US 61 · Structure no. 024504503800001

Built
1979
46 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,900 ft
14 main spans
Daily traffic
47,396
2021 count
Owner
State
State Highway Agency

About this bridge

I0310 over M. P. RR is a steel continuous stringer/multi-beam or girder carrying I0310 over M. P. RR in St. Charles 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 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 47,396 vehicles a day, roughly 25% of them trucks, projected to reach 52,135 by 2041. The structure is 1,900 ft (579.1 m) long and 87 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesI0310
CrossesM. P. RR
Location4.9 MI S of US 61
RouteInterstate 310
CountySt. Charles Parish
StateLouisiana
Coordinates29.9378, -90.3768
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20
Structure length1,900 ft (579.1 m)
Longest span200 ft (61 m)
Deck width87 ft (26.6 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,396 (2021)
Projected traffic52,135 by 2041
Trucks25%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed98.8 mi (159 km)
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I0310 over M. P. RR built?

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

What condition is I0310 over M. P. RR 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 November 2024.

How much traffic does I0310 over M. P. RR carry?

About 47,396 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0310 over M. P. RR?

The structure is 1,900 ft (579.1 m) long with a longest span of 200 ft (61 m) and a deck 87 ft wide.

Who owns I0310 over M. P. RR?

It is owned by the State Highway Agency.