US Bridges

FAS-798 over Little Muddy

Poor

Clay County, Illinois · Bible Grove · Structure no. 013316500000000

Built
1970
55 years old
Condition
Poor
inspected February 2024
Type
Slab
Concrete
Length
40 ft
2 main spans
Daily traffic
475
2021 count
Owner
County
County Highway Agency

About this bridge

FAS-798 over Little Muddy is a concrete slab carrying FAS-798 over Little Muddy in Clay County, Illinois. It was built in 1970, so it is 55 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 475 vehicles a day, roughly 19% of them trucks, projected to reach 480 by 2046. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFAS-798
CrossesLittle Muddy
LocationBible Grove
RouteCounty Highway 0
CountyClay County
StateIllinois
Coordinates38.87204, -88.44403
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating35.7 US tons
Inventory rating21.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span18 ft (5.5 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic475 (2021)
Projected traffic480 by 2046
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 FAS-798 over Little Muddy built?

It was built in 1970, making it 55 years old in 2025.

What condition is FAS-798 over Little Muddy in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does FAS-798 over Little Muddy carry?

About 475 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is FAS-798 over Little Muddy?

The structure is 40 ft (12.2 m) long with a longest span of 18 ft (5.5 m) and a deck 28 ft wide.

Who owns FAS-798 over Little Muddy?

It is owned by the County Highway Agency.