US Bridges

TR-177 over Coon Creek

Good

Effingham County, Illinois · 2 MI SE Altamont · Structure no. 025502000000000

Built
1984
41 years old
Condition
Good
inspected December 2022
Type
Culvert
Concrete
Length
27 ft
2 main spans
Daily traffic
200
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR-177 over Coon Creek is a concrete culvert carrying TR-177 over Coon Creek in Effingham County, Illinois. It was built in 1984, so it is 41 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 200 vehicles a day, roughly 16% of them trucks, projected to reach 106 by 2046. The structure is 27 ft (8.3 m) long and 25 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesTR-177
CrossesCoon Creek
Location2 MI SE Altamont
RouteCounty Highway 0
Coordinates39.04597, -88.70794
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert8 Very GoodNo problems noted.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length27 ft (8.3 m)
Longest span13 ft (3.9 m)
Deck width25 ft (7.7 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic106 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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-177 over Coon Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is TR-177 over Coon 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 December 2022.

How much traffic does TR-177 over Coon Creek carry?

About 200 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is TR-177 over Coon Creek?

The structure is 27 ft (8.3 m) long with a longest span of 13 ft (3.9 m) and a deck 25 ft wide.

Who owns TR-177 over Coon Creek?

It is owned by the Town or Township Highway Agency.