US Bridges

TR 101 over Seminary Creek

Good

Greene County, Illinois · 1.2 MI W Whitehall · Structure no. 031505200000000

Built
1983
42 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
300
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 101 over Seminary Creek is a prestressed concrete box beam or girders - multiple carrying TR 101 over Seminary Creek in Greene County, Illinois. It was built in 1983, so it is 42 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 300 vehicles a day, roughly 9% of them trucks, projected to reach 202 by 2046. The structure is 66 ft (20.1 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 101
CrossesSeminary Creek
Location1.2 MI W Whitehall
RouteCounty Highway 0
Coordinates39.44083, -90.42177
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span66 ft (20.1 m)
Deck width27 ft (8.3 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2022)
Projected traffic202 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 101 over Seminary Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is TR 101 over Seminary 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 2023.

How much traffic does TR 101 over Seminary Creek carry?

About 300 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is TR 101 over Seminary Creek?

The structure is 66 ft (20.1 m) long with a longest span of 66 ft (20.1 m) and a deck 27 ft wide.

Who owns TR 101 over Seminary Creek?

It is owned by the Town or Township Highway Agency.