US Bridges

Ch 20(FAS 661) over Stream

Fair

Coles County, Illinois · 1 MI SE Cooks Mills · Structure no. 015830200000000

Built
1943
82 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
825
2024 count
Owner
County
County Highway Agency

About this bridge

Ch 20(FAS 661) over Stream is a concrete culvert carrying Ch 20(FAS 661) over Stream in Coles County, Illinois. It was built in 1943, so it is 82 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 825 vehicles a day, roughly 5% of them trucks, projected to reach 808 by 2046. The structure is 22 ft (6.8 m) long and 31 ft wide.

CarriesCh 20(FAS 661)
CrossesStream
Location1 MI SE Cooks Mills
RouteCounty Highway 0
Coordinates39.57549, -88.39609
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.8 m)
Longest span10 ft (3.2 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic825 (2024)
Projected traffic808 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 20(FAS 661) over Stream built?

It was built in 1943, making it 82 years old in 2025.

What condition is Ch 20(FAS 661) over Stream 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 Ch 20(FAS 661) over Stream carry?

About 825 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Ch 20(FAS 661) over Stream?

The structure is 22 ft (6.8 m) long with a longest span of 10 ft (3.2 m) and a deck 31 ft wide.

Who owns Ch 20(FAS 661) over Stream?

It is owned by the County Highway Agency.