US Bridges

TR 42 (TH-S-17) over Thenius Creek

Good

Marshall County, Illinois · T12N-R9E-4PM Sec 11 · Structure no. 062504800000000

Built
1983
42 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
75 ft
1 main span
Daily traffic
25
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 42 (TH-S-17) over Thenius Creek is a prestressed concrete box beam or girders - multiple carrying TR 42 (TH-S-17) over Thenius Creek in Marshall 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 25 vehicles a day, projected to reach 25 by 2046. The structure is 75 ft (22.9 m) long and 24 ft wide.

CarriesTR 42 (TH-S-17)
CrossesThenius Creek
LocationT12N-R9E-4PM Sec 11
RouteCounty Highway 0
Coordinates41.04607, -89.44274
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 inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span70 ft (21.3 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic25 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 42 (TH-S-17) over Thenius Creek built?

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

What condition is TR 42 (TH-S-17) over Thenius 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 August 2023.

How much traffic does TR 42 (TH-S-17) over Thenius Creek carry?

About 25 vehicles per day (2024 count).

How long is TR 42 (TH-S-17) over Thenius Creek?

The structure is 75 ft (22.9 m) long with a longest span of 70 ft (21.3 m) and a deck 24 ft wide.

Who owns TR 42 (TH-S-17) over Thenius Creek?

It is owned by the Town or Township Highway Agency.