US Bridges

FAP-733 (IL-61&94) over Big Neck Creek

Fair

Adams County, Illinois · 0.5M N IL-61&94 Jct. · Structure no. 001000200000000

Built
1924
101 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
700
2023 count
Owner
State
State Highway Agency

About this bridge

FAP-733 (IL-61&94) over Big Neck Creek is a concrete slab carrying FAP-733 (IL-61&94) over Big Neck Creek in Adams County, Illinois. It was built in 1924, so it is 101 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 700 vehicles a day, roughly 16% of them trucks, projected to reach 758 by 2046. The structure is 26 ft (7.9 m) long and 32 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

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CarriesFAP-733 (IL-61&94)
CrossesBig Neck Creek
Location0.5M N IL-61&94 Jct.
RouteState Highway 61
CountyAdams County
StateIllinois
Coordinates40.14516, -91.06649
Functional classRural Major 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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width32 ft (9.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2023)
Projected traffic758 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 FAP-733 (IL-61&94) over Big Neck Creek built?

It was built in 1924, making it 101 years old in 2025.

What condition is FAP-733 (IL-61&94) over Big Neck Creek 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 May 2023.

How much traffic does FAP-733 (IL-61&94) over Big Neck Creek carry?

About 700 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is FAP-733 (IL-61&94) over Big Neck Creek?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 32 ft wide.

Who owns FAP-733 (IL-61&94) over Big Neck Creek?

It is owned by the State Highway Agency.