US Bridges

CH-8 (FAS-939) over Unnamed Creek

Fair

Pulaski County, Illinois · 1 MI NE Mounds · Structure no. 077307800000000

Built
1981
44 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
1,850
2023 count
Owner
County
County Highway Agency

About this bridge

CH-8 (FAS-939) over Unnamed Creek is a prestressed concrete box beam or girders - multiple carrying CH-8 (FAS-939) over Unnamed Creek in Pulaski County, Illinois. It was built in 1981, so it is 44 years old, younger 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 1,850 vehicles a day, roughly 14% of them trucks, projected to reach 1,869 by 2046. The structure is 59 ft (17.9 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCH-8 (FAS-939)
CrossesUnnamed Creek
Location1 MI NE Mounds
RouteCounty Highway 0
CountyPulaski County
StateIllinois
Coordinates37.12926, -89.17263
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length59 ft (17.9 m)
Longest span56 ft (17 m)
Deck width34 ft (10.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,850 (2023)
Projected traffic1,869 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 CH-8 (FAS-939) over Unnamed Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is CH-8 (FAS-939) over Unnamed 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 November 2024.

How much traffic does CH-8 (FAS-939) over Unnamed Creek carry?

About 1,850 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is CH-8 (FAS-939) over Unnamed Creek?

The structure is 59 ft (17.9 m) long with a longest span of 56 ft (17 m) and a deck 34 ft wide.

Who owns CH-8 (FAS-939) over Unnamed Creek?

It is owned by the County Highway Agency.