US Bridges

FAU 8003 Long Bay over Lake Springfield

Fair

Sangamon County, Illinois · W of Henson Robinson Zoo · Structure no. 084991600000000

Built
1933
92 years old
Condition
Fair
inspected September 2024
Type
Girder and Floorbeam System
Concrete
Length
1,398 ft
11 main spans
Daily traffic
1,850
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

FAU 8003 Long Bay over Lake Springfield is a concrete girder and floorbeam system carrying FAU 8003 Long Bay over Lake Springfield in Sangamon County, Illinois. It was built in 1933, so it is 92 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 6 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 1,850 vehicles a day, roughly 4% of them trucks, projected to reach 1,869 by 2046. The structure is 1,398 ft (426.1 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesFAU 8003 Long Bay
CrossesLake Springfield
LocationW of Henson Robinson Zoo
CountySangamon County
StateIllinois
Coordinates39.72682, -89.59785
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29.7 US tons
Inventory rating18.2 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11 (+10 approach)
Design loadUnknown
Structure length1,398 ft (426.1 m)
Longest span100 ft (30.5 m)
Deck width37 ft (11.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,850 (2022)
Projected traffic1,869 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU 8003 Long Bay over Lake Springfield built?

It was built in 1933, making it 92 years old in 2025.

What condition is FAU 8003 Long Bay over Lake Springfield 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 September 2024.

How much traffic does FAU 8003 Long Bay over Lake Springfield carry?

About 1,850 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is FAU 8003 Long Bay over Lake Springfield?

The structure is 1,398 ft (426.1 m) long with a longest span of 100 ft (30.5 m) and a deck 37 ft wide.

Who owns FAU 8003 Long Bay over Lake Springfield?

It is owned by the City or Municipal Highway Agency.