US Bridges

IL3NB-255WB Ramp a over I 255 NB - Ramp D

Fair

Monroe County, Illinois · North of Columbia · Structure no. 067002500000000

Built
1982
43 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
150 ft
1 main span
Daily traffic
25,850
2023 count
Owner
State
State Highway Agency

About this bridge

IL3NB-255WB Ramp a over I 255 NB - Ramp D is a steel stringer/multi-beam or girder carrying IL3NB-255WB Ramp a over I 255 NB - Ramp D in Monroe County, Illinois. It was built in 1982, so it is 43 years old, younger than the Illinois average of 45.3 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 25,850 vehicles a day, roughly 10% of them trucks, projected to reach 14,125 by 2046. The structure is 150 ft (45.7 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIL3NB-255WB Ramp a
CrossesI 255 NB - Ramp D
LocationNorth of Columbia
RouteInterstate 255
CountyMonroe County
StateIllinois
Coordinates38.4739, -90.2285
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length150 ft (45.7 m)
Longest span147 ft (44.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,850 (2023)
Projected traffic14,125 by 2046
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 IL3NB-255WB Ramp a over I 255 NB - Ramp D built?

It was built in 1982, making it 43 years old in 2025.

What condition is IL3NB-255WB Ramp a over I 255 NB - Ramp D 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 January 2025.

How much traffic does IL3NB-255WB Ramp a over I 255 NB - Ramp D carry?

About 25,850 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IL3NB-255WB Ramp a over I 255 NB - Ramp D?

The structure is 150 ft (45.7 m) long with a longest span of 147 ft (44.8 m) and a deck 43 ft wide.

Who owns IL3NB-255WB Ramp a over I 255 NB - Ramp D?

It is owned by the State Highway Agency.