US Bridges

I0055 over I-55 North on Ramp Ruddc

Good

St. John the Baptist Parish, Louisiana · 0.1 M W of US 51 · Structure no. 624804520107955

Built
1975
50 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
660 ft
8 main spans
Daily traffic
8,115
2021 count
Owner
State
State Highway Agency

About this bridge

I0055 over I-55 North on Ramp Ruddc is a prestressed concrete stringer/multi-beam or girder carrying I0055 over I-55 North on Ramp Ruddc in St. John the Baptist Parish, Louisiana. It was built in 1975, so it is 50 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,115 vehicles a day, roughly 25% of them trucks, projected to reach 8,926 by 2041. The structure is 660 ft (201.2 m) long and 29 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesI0055
CrossesI-55 North on Ramp Ruddc
Location0.1 M W of US 51
RouteInterstate 55
CountySt. John the Baptist Parish
StateLouisiana
Coordinates30.19496, -90.4343
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8 (+5 approach)
Design loadHS 20
Structure length660 ft (201.2 m)
Longest span70 ft (21.3 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,115 (2021)
Projected traffic8,926 by 2041
Trucks25%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 I0055 over I-55 North on Ramp Ruddc built?

It was built in 1975, making it 50 years old in 2025.

What condition is I0055 over I-55 North on Ramp Ruddc in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does I0055 over I-55 North on Ramp Ruddc carry?

About 8,115 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0055 over I-55 North on Ramp Ruddc?

The structure is 660 ft (201.2 m) long with a longest span of 70 ft (21.3 m) and a deck 29 ft wide.

Who owns I0055 over I-55 North on Ramp Ruddc?

It is owned by the State Highway Agency.