US Bridges

Township RD No 186 over Br Coon Creek

Fair

Jo Daviess County, Illinois · 5.5 MI So Apple Riv · Structure no. 043314500000000

Built
1915
110 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
25
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Township RD No 186 over Br Coon Creek is a concrete slab carrying Township RD No 186 over Br Coon Creek in Jo Daviess County, Illinois. It was built in 1915, so it is 110 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 25 vehicles a day, projected to reach 25 by 2046. The structure is 24 ft (7.3 m) long and 18 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesTownship RD No 186
CrossesBr Coon Creek
Location5.5 MI So Apple Riv
RouteCounty Highway 0
CountyJo Daviess County
StateIllinois
Coordinates42.4218, -90.10173
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionSeptember 2024
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width18 ft (5.4 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2021)
Projected traffic25 by 2046
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$56,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Township RD No 186 over Br Coon Creek built?

It was built in 1915, making it 110 years old in 2025.

What condition is Township RD No 186 over Br Coon Creek 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 September 2024.

How much traffic does Township RD No 186 over Br Coon Creek carry?

About 25 vehicles per day (2021 count).

How long is Township RD No 186 over Br Coon Creek?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 18 ft wide.

Who owns Township RD No 186 over Br Coon Creek?

It is owned by the Town or Township Highway Agency.