US Bridges

US 51 over Unnamed Stream

Good

Jackson County, Illinois · N of Scl Elkville · Structure no. 039203200000000

Built
2022
3 years old
Condition
Good
inspected February 2025
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
6,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 over Unnamed Stream is a concrete continuous culvert carrying US 51 over Unnamed Stream in Jackson County, Illinois. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,400 vehicles a day, roughly 8% of them trucks, projected to reach 7,070 by 2046. The structure is 26 ft (8 m) long and 50 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

Open in Google Maps
CarriesUS 51
CrossesUnnamed Stream
LocationN of Scl Elkville
RouteU.S. Route 51
CountyJackson County
StateIllinois
Coordinates37.9065, -89.2356
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length26 ft (8 m)
Longest span13 ft (3.9 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,400 (2023)
Projected traffic7,070 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 km)
TollOn a free road
National Highway SystemYes

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 US 51 over Unnamed Stream built?

It was built in 2022, making it 3 years old in 2025.

What condition is US 51 over Unnamed Stream 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 February 2025.

How much traffic does US 51 over Unnamed Stream carry?

About 6,400 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is US 51 over Unnamed Stream?

The structure is 26 ft (8 m) long with a longest span of 13 ft (3.9 m) and a deck 50 ft wide.

Who owns US 51 over Unnamed Stream?

It is owned by the State Highway Agency.