US Bridges

FAP-750 (ILL-185) over Lone Grove Branch

Fair

Fayette County, Illinois · 0.5 MI N. ST Peter · Structure no. 026006700000000

Built
1932
93 years old, rebuilt 1977
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
950
2023 count
Owner
State
State Highway Agency

About this bridge

FAP-750 (ILL-185) over Lone Grove Branch is a concrete slab carrying FAP-750 (ILL-185) over Lone Grove Branch in Fayette County, Illinois. It was built in 1932 and reconstructed in 1977, so it is 93 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 950 vehicles a day, roughly 21% of them trucks, projected to reach 1,020 by 2046. The structure is 30 ft (9.1 m) long and 42 ft wide. If it were closed, the detour would be 52.8 mi (85 km).

Location

Open in Google Maps
CarriesFAP-750 (ILL-185)
CrossesLone Grove Branch
Location0.5 MI N. ST Peter
RouteState Highway 185
CountyFayette County
StateIllinois
Coordinates38.87681, -88.86302
Functional classRural Minor Arterial

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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic950 (2023)
Projected traffic1,020 by 2046
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.8 mi (85 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-750 (ILL-185) over Lone Grove Branch built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1977.

What condition is FAP-750 (ILL-185) over Lone Grove Branch 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 December 2023.

How much traffic does FAP-750 (ILL-185) over Lone Grove Branch carry?

About 950 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is FAP-750 (ILL-185) over Lone Grove Branch?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 42 ft wide.

Who owns FAP-750 (ILL-185) over Lone Grove Branch?

It is owned by the State Highway Agency.