US Bridges

TR 120 over Henderson Creek

Good

Mercer County, Illinois · SW-30-T13NR3W · Structure no. 066433000000000

Built
1984
41 years old
Condition
Good
inspected December 2021
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
81 ft
1 main span
Daily traffic
25
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 120 over Henderson Creek is a prestressed concrete box beam or girders - multiple carrying TR 120 over Henderson Creek in Mercer County, Illinois. It was built in 1984, so it is 41 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 81 ft (24.7 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTR 120
CrossesHenderson Creek
LocationSW-30-T13NR3W
RouteCounty Highway 0
Coordinates41.08448, -90.78468
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 inspectionDecember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating59.3 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length81 ft (24.7 m)
Longest span79 ft (24.1 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 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 120 over Henderson Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is TR 120 over Henderson 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 December 2021.

How much traffic does TR 120 over Henderson Creek carry?

About 25 vehicles per day (2024 count).

How long is TR 120 over Henderson Creek?

The structure is 81 ft (24.7 m) long with a longest span of 79 ft (24.1 m) and a deck 24 ft wide.

Who owns TR 120 over Henderson Creek?

It is owned by the Town or Township Highway Agency.