US Bridges

TR 197 over N Fork Lake Fork C

Fair

Logan County, Illinois · 2 MI E 2MIS Chestnut · Structure no. 054490100000000

Built
1973
52 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
50
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 197 over N Fork Lake Fork C is a concrete continuous slab carrying TR 197 over N Fork Lake Fork C in Logan County, Illinois. It was built in 1973, so it is 52 years old, older 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 50 vehicles a day, roughly 4% of them trucks, projected to reach 53 by 2046. The structure is 100 ft (30.5 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 197
CrossesN Fork Lake Fork C
Location2 MI E 2MIS Chestnut
RouteCounty Highway 0
CountyLogan County
StateIllinois
Coordinates40.01956, -89.14793
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length100 ft (30.5 m)
Longest span38 ft (11.6 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic53 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 197 over N Fork Lake Fork C built?

It was built in 1973, making it 52 years old in 2025.

What condition is TR 197 over N Fork Lake Fork C 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 2023.

How much traffic does TR 197 over N Fork Lake Fork C carry?

About 50 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is TR 197 over N Fork Lake Fork C?

The structure is 100 ft (30.5 m) long with a longest span of 38 ft (11.6 m) and a deck 24 ft wide.

Who owns TR 197 over N Fork Lake Fork C?

It is owned by the Town or Township Highway Agency.