US Bridges

FAS 917 over Big Muddy River

Fair

Jackson County, Illinois · SW 1/4 Sec 15-9-3 · Structure no. 039312200000000

Built
1976
49 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
484 ft
6 main spans
Daily traffic
900
2022 count
Owner
County
County Highway Agency

About this bridge

FAS 917 over Big Muddy River is a steel stringer/multi-beam or girder carrying FAS 917 over Big Muddy River in Jackson County, Illinois. It was built in 1976, so it is 49 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 900 vehicles a day, roughly 10% of them trucks, projected to reach 1,010 by 2046. The structure is 484 ft (147.5 m) long and 30 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesFAS 917
CrossesBig Muddy River
LocationSW 1/4 Sec 15-9-3
RouteCounty Highway 0
CountyJackson County
StateIllinois
Coordinates37.7398, -89.42893
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
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 15
Structure length484 ft (147.5 m)
Longest span93 ft (28.3 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2022)
Projected traffic1,010 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 917 over Big Muddy River built?

It was built in 1976, making it 49 years old in 2025.

What condition is FAS 917 over Big Muddy River 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 March 2024.

How much traffic does FAS 917 over Big Muddy River carry?

About 900 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is FAS 917 over Big Muddy River?

The structure is 484 ft (147.5 m) long with a longest span of 93 ft (28.3 m) and a deck 30 ft wide.

Who owns FAS 917 over Big Muddy River?

It is owned by the County Highway Agency.