US Bridges

US 45 over Southern Outlet

Good

White County, Illinois · 2.5 M S. Mill Shoals · Structure no. 097007600000000

Built
2012
13 years old
Condition
Good
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
127 ft
3 main spans
Daily traffic
1,600
2023 count
Owner
State
State Highway Agency

About this bridge

US 45 over Southern Outlet is a steel continuous stringer/multi-beam or girder carrying US 45 over Southern Outlet in White County, Illinois. It was built in 2012, so it is 13 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 1,600 vehicles a day, roughly 23% of them trucks, projected to reach 1,869 by 2046. The structure is 127 ft (38.7 m) long and 35 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesUS 45
CrossesSouthern Outlet
Location2.5 M S. Mill Shoals
RouteU.S. Route 45
CountyWhite County
StateIllinois
Coordinates38.20498, -88.35112
Functional classRural 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.1 US tons
Inventory rating57.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length127 ft (38.7 m)
Longest span48 ft (14.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic1,869 by 2046
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 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 US 45 over Southern Outlet built?

It was built in 2012, making it 13 years old in 2025.

What condition is US 45 over Southern Outlet 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 November 2022.

How much traffic does US 45 over Southern Outlet carry?

About 1,600 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is US 45 over Southern Outlet?

The structure is 127 ft (38.7 m) long with a longest span of 48 ft (14.6 m) and a deck 35 ft wide.

Who owns US 45 over Southern Outlet?

It is owned by the State Highway Agency.