US Bridges

Illinois 100 over Poor Farm Hollow Crk

Good

Calhoun County, Illinois · Hardin High Sch MP.9 · Structure no. 007200500000000

Built
1996
29 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete Continuous
Length
35 ft
3 main spans
Daily traffic
3,400
2023 count
Owner
State
State Highway Agency

About this bridge

Illinois 100 over Poor Farm Hollow Crk is a concrete continuous culvert carrying Illinois 100 over Poor Farm Hollow Crk in Calhoun County, Illinois. It was built in 1996, so it is 29 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 3,400 vehicles a day, roughly 9% of them trucks, projected to reach 2,828 by 2046. The structure is 35 ft (10.8 m) long. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesIllinois 100
CrossesPoor Farm Hollow Crk
LocationHardin High Sch MP.9
RouteState Highway 100
CountyCalhoun County
StateIllinois
Coordinates39.17359, -90.61306
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
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating36.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length35 ft (10.8 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2023)
Projected traffic2,828 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Illinois 100 over Poor Farm Hollow Crk built?

It was built in 1996, making it 29 years old in 2025.

What condition is Illinois 100 over Poor Farm Hollow Crk 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 2023.

How much traffic does Illinois 100 over Poor Farm Hollow Crk carry?

About 3,400 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Illinois 100 over Poor Farm Hollow Crk?

The structure is 35 ft (10.8 m) long with a longest span of 11 ft (3.4 m).

Who owns Illinois 100 over Poor Farm Hollow Crk?

It is owned by the State Highway Agency.