US Bridges

Ch 16 over Flat Branch Creek

Good

Coles County, Illinois · 3 MI NE Cooks Mill · Structure no. 015323800000000

Built
1980
45 years old
Condition
Good
inspected January 2025
Type
Channel Beam
Concrete
Length
104 ft
3 main spans
Daily traffic
325
2024 count
Owner
County
County Highway Agency

About this bridge

Ch 16 over Flat Branch Creek is a concrete channel beam carrying Ch 16 over Flat Branch Creek in Coles County, Illinois. It was built in 1980, so it is 45 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 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 325 vehicles a day, roughly 3% of them trucks, projected to reach 328 by 2046. The structure is 104 ft (31.7 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCh 16
CrossesFlat Branch Creek
Location3 MI NE Cooks Mill
RouteCounty Highway 0
Coordinates39.60446, -88.37448
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span34 ft (10.4 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic325 (2024)
Projected traffic328 by 2046
Trucks3%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Ch 16 over Flat Branch Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Ch 16 over Flat Branch 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 January 2025.

How much traffic does Ch 16 over Flat Branch Creek carry?

About 325 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Ch 16 over Flat Branch Creek?

The structure is 104 ft (31.7 m) long with a longest span of 34 ft (10.4 m) and a deck 26 ft wide.

Who owns Ch 16 over Flat Branch Creek?

It is owned by the County Highway Agency.