US Bridges

Thenius Road over Thenius CR

Fair

Marshall County, Illinois · Village of Sparland · Structure no. 062630300000000

Built
1987
38 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
76 ft
1 main span
Daily traffic
150
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Thenius Road over Thenius CR is a prestressed concrete box beam or girders - multiple carrying Thenius Road over Thenius CR in Marshall County, Illinois. It was built in 1987, so it is 38 years old, younger 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 6 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 150 vehicles a day, roughly 37% of them trucks, projected to reach 152 by 2046. The structure is 76 ft (23.3 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesThenius Road
CrossesThenius CR
LocationVillage of Sparland
RouteCity Street 0
CountyMarshall County
StateIllinois
Coordinates41.03489, -89.4389
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum 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 alignment6: Equal to present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length76 ft (23.3 m)
Longest span74 ft (22.5 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic152 by 2046
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Thenius Road over Thenius CR built?

It was built in 1987, making it 38 years old in 2025.

What condition is Thenius Road over Thenius CR 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 August 2023.

How much traffic does Thenius Road over Thenius CR carry?

About 150 vehicles per day (2024 count), of which roughly 37% are trucks.

How long is Thenius Road over Thenius CR?

The structure is 76 ft (23.3 m) long with a longest span of 74 ft (22.5 m) and a deck 27 ft wide.

Who owns Thenius Road over Thenius CR?

It is owned by the City or Municipal Highway Agency.