US Bridges

FAU 7998 Ch 40 over Lake Springfield

Good

Sangamon County, Illinois · 1.5 MI E of Chatham · Structure no. 084341300000000

Built
1987
38 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
149 ft
3 main spans
Daily traffic
8,000
2022 count
Owner
County
County Highway Agency

About this bridge

FAU 7998 Ch 40 over Lake Springfield is a steel continuous stringer/multi-beam or girder carrying FAU 7998 Ch 40 over Lake Springfield in Sangamon County, Illinois. It was built in 1987, so it is 38 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 8,000 vehicles a day, roughly 4% of them trucks, projected to reach 5,959 by 2046. The structure is 149 ft (45.4 m) long and 44 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesFAU 7998 Ch 40
CrossesLake Springfield
Location1.5 MI E of Chatham
CountySangamon County
StateIllinois
Coordinates39.67327, -89.66341
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length149 ft (45.4 m)
Longest span48 ft (14.6 m)
Deck width44 ft (13.3 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2022)
Projected traffic5,959 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 FAU 7998 Ch 40 over Lake Springfield built?

It was built in 1987, making it 38 years old in 2025.

What condition is FAU 7998 Ch 40 over Lake Springfield 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 March 2023.

How much traffic does FAU 7998 Ch 40 over Lake Springfield carry?

About 8,000 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is FAU 7998 Ch 40 over Lake Springfield?

The structure is 149 ft (45.4 m) long with a longest span of 48 ft (14.6 m) and a deck 44 ft wide.

Who owns FAU 7998 Ch 40 over Lake Springfield?

It is owned by the County Highway Agency.