US Bridges

CH-8 over Trib Big Mound Drain

Good

Wayne County, Illinois · 4 MI SE Fairfield · Structure no. 096336500000000

Built
1987
38 years old
Condition
Good
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

CH-8 over Trib Big Mound Drain is a prestressed concrete box beam or girders - multiple carrying CH-8 over Trib Big Mound Drain in Wayne County, Illinois. It was built in 1987, so it is 38 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 75 vehicles a day, roughly 19% of them trucks, projected to reach 77 by 2046. The structure is 52 ft (15.8 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCH-8
CrossesTrib Big Mound Drain
Location4 MI SE Fairfield
RouteCounty Highway 0
Coordinates38.32942, -88.42514
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span49 ft (14.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic77 by 2046
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 over Trib Big Mound Drain built?

It was built in 1987, making it 38 years old in 2025.

What condition is CH-8 over Trib Big Mound Drain 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 February 2024.

How much traffic does CH-8 over Trib Big Mound Drain carry?

About 75 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is CH-8 over Trib Big Mound Drain?

The structure is 52 ft (15.8 m) long with a longest span of 49 ft (14.9 m) and a deck 28 ft wide.

Who owns CH-8 over Trib Big Mound Drain?

It is owned by the County Highway Agency.