US Bridges

TR-159A over Marys River

Good

Randolph County, Illinois · 4 Miles SE of Sparta · Structure no. 079416300000000

Built
2003
22 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
104 ft
1 main span
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

TR-159A over Marys River is a prestressed concrete box beam or girders - multiple carrying TR-159A over Marys River in Randolph County, Illinois. It was built in 2003, so it is 22 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 50 vehicles a day, roughly 14% of them trucks, projected to reach 51 by 2046. The structure is 104 ft (31.7 m) long and 24 ft wide.

CarriesTR-159A
CrossesMarys River
Location4 Miles SE of Sparta
RouteCounty Highway 0
Coordinates38.0734, -89.64682
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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length104 ft (31.7 m)
Longest span102 ft (31.2 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic51 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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-159A over Marys River built?

It was built in 2003, making it 22 years old in 2025.

What condition is TR-159A over Marys River 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 November 2023.

How much traffic does TR-159A over Marys River carry?

About 50 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is TR-159A over Marys River?

The structure is 104 ft (31.7 m) long with a longest span of 102 ft (31.2 m) and a deck 24 ft wide.

Who owns TR-159A over Marys River?

It is owned by the County Highway Agency.