US Bridges

TR 237 over Spring Branch

Fair

Bond County, Illinois · 2.75 M N Keyesport · Structure no. 003390600000000

Built
1967
58 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
146 ft
4 main spans
Daily traffic
50
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 237 over Spring Branch is a prestressed concrete box beam or girders - multiple carrying TR 237 over Spring Branch in Bond County, Illinois. It was built in 1967, so it is 58 years old, older 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 50 vehicles a day, roughly 8% of them trucks, projected to reach 51 by 2046. The structure is 146 ft (44.5 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 237
CrossesSpring Branch
Location2.75 M N Keyesport
RouteCounty Highway 0
CountyBond County
StateIllinois
Coordinates38.78254, -89.26541
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating22.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadHS 15
Structure length146 ft (44.5 m)
Longest span36 ft (11 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic51 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 237 over Spring Branch built?

It was built in 1967, making it 58 years old in 2025.

What condition is TR 237 over Spring Branch 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 January 2024.

How much traffic does TR 237 over Spring Branch carry?

About 50 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is TR 237 over Spring Branch?

The structure is 146 ft (44.5 m) long with a longest span of 36 ft (11 m) and a deck 22 ft wide.

Who owns TR 237 over Spring Branch?

It is owned by the Town or Township Highway Agency.