US Bridges

TR 108 over Trib South Otter CR

Good

Jersey County, Illinois · 2MI NW Otterville · Structure no. 042314200000000

Built
2007
18 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
75
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 108 over Trib South Otter CR is a concrete continuous culvert carrying TR 108 over Trib South Otter CR in Jersey County, Illinois. It was built in 2007, so it is 18 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 75 vehicles a day, roughly 17% of them trucks, projected to reach 76 by 2046. The structure is 28 ft (8.6 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 108
CrossesTrib South Otter CR
Location2MI NW Otterville
RouteCounty Highway 0
Coordinates39.08463, -90.42701
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length28 ft (8.6 m)
Longest span13 ft (4.1 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic76 by 2046
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 108 over Trib South Otter CR built?

It was built in 2007, making it 18 years old in 2025.

What condition is TR 108 over Trib South Otter CR 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 March 2024.

How much traffic does TR 108 over Trib South Otter CR carry?

About 75 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is TR 108 over Trib South Otter CR?

The structure is 28 ft (8.6 m) long with a longest span of 13 ft (4.1 m) and a deck 20 ft wide.

Who owns TR 108 over Trib South Otter CR?

It is owned by the Town or Township Highway Agency.