US Bridges

SBI-15 over Unnamed Stream

Poor

Wayne County, Illinois · 3.5 MI W Edwards C L · Structure no. 096002700000000

Built
1921
104 years old
Condition
Poor
inspected February 2024
Type
Slab
Concrete
Length
79 ft
3 main spans
Daily traffic
10
2022 count
Owner
County
County Highway Agency

About this bridge

SBI-15 over Unnamed Stream is a concrete slab carrying SBI-15 over Unnamed Stream in Wayne County, Illinois. It was built in 1921, so it is 104 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 10 vehicles a day, roughly 20% of them trucks, projected to reach 10 by 2046. The structure is 79 ft (24.1 m) long and 23 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSBI-15
CrossesUnnamed Stream
Location3.5 MI W Edwards C L
RouteCounty Highway 0
CountyWayne County
StateIllinois
Coordinates38.37527, -88.21496
Functional classRural Local

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.4 US tons
Inventory rating45.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length79 ft (24.1 m)
Longest span27 ft (8.1 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2022)
Projected traffic10 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$143,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SBI-15 over Unnamed Stream built?

It was built in 1921, making it 104 years old in 2025.

What condition is SBI-15 over Unnamed Stream 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 February 2024.

How much traffic does SBI-15 over Unnamed Stream carry?

About 10 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is SBI-15 over Unnamed Stream?

The structure is 79 ft (24.1 m) long with a longest span of 27 ft (8.1 m) and a deck 23 ft wide.

Who owns SBI-15 over Unnamed Stream?

It is owned by the County Highway Agency.