US Bridges

FAP 821 (il 15) over Big Muddy Overflow

Good

Jefferson County, Illinois · 7.9 MI E Wash CO LN · Structure no. 041010400000000

Built
2003
22 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
234 ft
3 main spans
Daily traffic
5,200
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 821 (il 15) over Big Muddy Overflow is a steel continuous stringer/multi-beam or girder carrying FAP 821 (il 15) over Big Muddy Overflow in Jefferson County, Illinois. It was built in 2003, so it is 22 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 5,200 vehicles a day, roughly 8% of them trucks, projected to reach 5,252 by 2046. The structure is 234 ft (71.2 m) long and 39 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesFAP 821 (il 15)
CrossesBig Muddy Overflow
Location7.9 MI E Wash CO LN
RouteState Highway 15
CountyJefferson County
StateIllinois
Coordinates38.31032, -89.00086
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating81 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length234 ft (71.2 m)
Longest span85 ft (25.9 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,200 (2023)
Projected traffic5,252 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 821 (il 15) over Big Muddy Overflow built?

It was built in 2003, making it 22 years old in 2025.

What condition is FAP 821 (il 15) over Big Muddy Overflow 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 September 2023.

How much traffic does FAP 821 (il 15) over Big Muddy Overflow carry?

About 5,200 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is FAP 821 (il 15) over Big Muddy Overflow?

The structure is 234 ft (71.2 m) long with a longest span of 85 ft (25.9 m) and a deck 39 ft wide.

Who owns FAP 821 (il 15) over Big Muddy Overflow?

It is owned by the State Highway Agency.