US Bridges

Ill. Rte. 127 over Swanwick CR Overflow

Fair

Perry County, Illinois · 4.1M S Wash CO Line · Structure no. 073002600000000

Built
1976
49 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
238 ft
4 main spans
Daily traffic
3,500
2023 count
Owner
State
State Highway Agency

About this bridge

Ill. Rte. 127 over Swanwick CR Overflow is a steel continuous stringer/multi-beam or girder carrying Ill. Rte. 127 over Swanwick CR Overflow in Perry County, Illinois. It was built in 1976, so it is 49 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,500 vehicles a day, roughly 11% of them trucks, projected to reach 3,333 by 2046. The structure is 238 ft (72.6 m) long and 46 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

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CarriesIll. Rte. 127
CrossesSwanwick CR Overflow
Location4.1M S Wash CO Line
RouteState Highway 127
CountyPerry County
StateIllinois
Coordinates38.15594, -89.38364
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating47.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length238 ft (72.6 m)
Longest span64 ft (19.6 m)
Deck width46 ft (14 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic3,333 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 Ill. Rte. 127 over Swanwick CR Overflow built?

It was built in 1976, making it 49 years old in 2025.

What condition is Ill. Rte. 127 over Swanwick CR Overflow in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does Ill. Rte. 127 over Swanwick CR Overflow carry?

About 3,500 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Ill. Rte. 127 over Swanwick CR Overflow?

The structure is 238 ft (72.6 m) long with a longest span of 64 ft (19.6 m) and a deck 46 ft wide.

Who owns Ill. Rte. 127 over Swanwick CR Overflow?

It is owned by the State Highway Agency.