US Bridges

TR 178 Elm Road over Coon Creek

Good

Washington County, Illinois · 2 MI NW of Hoyleton · Structure no. 095326400000000

Built
2015
10 years old
Condition
Good
inspected April 2021
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
75
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 178 Elm Road over Coon Creek is a prestressed concrete box beam or girders - multiple carrying TR 178 Elm Road over Coon Creek in Washington County, Illinois. It was built in 2015, so it is 10 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 75 vehicles a day, roughly 20% of them trucks, projected to reach 91 by 2046. The structure is 49 ft (14.8 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesTR 178 Elm Road
CrossesCoon Creek
Location2 MI NW of Hoyleton
RouteCounty Highway 0
Coordinates38.35019, -89.60581
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2021
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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length49 ft (14.8 m)
Longest span48 ft (14.5 m)
Deck width24 ft (7.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic75 (2024)
Projected traffic91 by 2046
Trucks20%
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 178 Elm Road over Coon Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is TR 178 Elm Road 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 April 2021.

How much traffic does TR 178 Elm Road over Coon Creek carry?

About 75 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is TR 178 Elm Road over Coon Creek?

The structure is 49 ft (14.8 m) long with a longest span of 48 ft (14.5 m) and a deck 24 ft wide.

Who owns TR 178 Elm Road over Coon Creek?

It is owned by the Town or Township Highway Agency.