US Bridges

Il 255 - FAP 310 over Rock Creek

Good

Madison County, Illinois · N of Seminary RD · Structure no. 060204300000000

Built
2010
15 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete Continuous
Length
36 ft
3 main spans
Daily traffic
13,600
2023 count
Owner
State
State Highway Agency

About this bridge

Il 255 - FAP 310 over Rock Creek is a concrete continuous culvert carrying Il 255 - FAP 310 over Rock Creek in Madison County, Illinois. It was built in 2010, so it is 15 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 13,600 vehicles a day, roughly 14% of them trucks, projected to reach 14,980 by 2046. The structure is 36 ft (11 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIl 255 - FAP 310
CrossesRock Creek
LocationN of Seminary RD
RouteState Highway 255
CountyMadison County
StateIllinois
Coordinates38.94809, -90.15083
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length36 ft (11 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,600 (2023)
Projected traffic14,980 by 2046
Trucks14%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 255 - FAP 310 over Rock Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Il 255 - FAP 310 over Rock Creek 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 November 2024.

How much traffic does Il 255 - FAP 310 over Rock Creek carry?

About 13,600 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Il 255 - FAP 310 over Rock Creek?

The structure is 36 ft (11 m) long with a longest span of 11 ft (3.5 m).

Who owns Il 255 - FAP 310 over Rock Creek?

It is owned by the State Highway Agency.