US Bridges

Old US 51 (unmarke over Clay Lick Branch

Poor

Jackson County, Illinois · 0.1 MI N Union CO · Structure no. 039200700000000

Built
1958
67 years old
Condition
Poor
inspected December 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
850
2022 count
Owner
State
State Highway Agency

About this bridge

Old US 51 (unmarke over Clay Lick Branch is a concrete continuous culvert carrying Old US 51 (unmarke over Clay Lick Branch in Jackson County, Illinois. It was built in 1958, so it is 67 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 850 vehicles a day, roughly 7% of them trucks, projected to reach 1,010 by 2046. The structure is 27 ft (8.3 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesOld US 51 (unmarke
CrossesClay Lick Branch
Location0.1 MI N Union CO
RouteCounty Highway 0
CountyJackson County
StateIllinois
Coordinates37.59984, -89.23999
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating59.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length27 ft (8.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic850 (2022)
Projected traffic1,010 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Old US 51 (unmarke over Clay Lick Branch built?

It was built in 1958, making it 67 years old in 2025.

What condition is Old US 51 (unmarke over Clay Lick Branch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does Old US 51 (unmarke over Clay Lick Branch carry?

About 850 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Old US 51 (unmarke over Clay Lick Branch?

The structure is 27 ft (8.3 m) long with a longest span of 12 ft (3.7 m).

Who owns Old US 51 (unmarke over Clay Lick Branch?

It is owned by the State Highway Agency.