US Bridges

Il 10 over Salt Spring Branch

Good

Logan County, Illinois · 1.2M E Il 121 · Structure no. 054202900000000

Built
1991
34 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
29 ft
3 main spans
Daily traffic
2,200
2023 count
Owner
State
State Highway Agency

About this bridge

Il 10 over Salt Spring Branch is a concrete continuous culvert carrying Il 10 over Salt Spring Branch in Logan County, Illinois. It was built in 1991, so it is 34 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 2,200 vehicles a day, roughly 11% of them trucks, projected to reach 2,625 by 2046. The structure is 29 ft (8.8 m) long and 47 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesIl 10
CrossesSalt Spring Branch
Location1.2M E Il 121
RouteState Highway 10
Coordinates40.15014, -89.33097
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span9 ft (2.7 m)
Deck width47 ft (14.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2023)
Projected traffic2,625 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Il 10 over Salt Spring Branch built?

It was built in 1991, making it 34 years old in 2025.

What condition is Il 10 over Salt Spring Branch 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 2023.

How much traffic does Il 10 over Salt Spring Branch carry?

About 2,200 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Il 10 over Salt Spring Branch?

The structure is 29 ft (8.8 m) long with a longest span of 9 ft (2.7 m) and a deck 47 ft wide.

Who owns Il 10 over Salt Spring Branch?

It is owned by the State Highway Agency.