US Bridges

Ill 84 over Irish Hollow Creek

Good

Jo Daviess County, Illinois · 2.3 MI S US 20 · Structure no. 043003700000000

Built
1984
41 years old, rebuilt 2010
Condition
Good
inspected October 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
209 ft
3 main spans
Daily traffic
1,800
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 84 over Irish Hollow Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Ill 84 over Irish Hollow Creek in Jo Daviess County, Illinois. It was built in 1984 and reconstructed in 2010, so it is 41 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 1,800 vehicles a day, roughly 13% of them trucks, projected to reach 1,970 by 2046. The structure is 209 ft (63.7 m) long and 35 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesIll 84
CrossesIrish Hollow Creek
Location2.3 MI S US 20
RouteState Highway 84
CountyJo Daviess County
StateIllinois
Coordinates42.29387, -90.28201
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating55.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length209 ft (63.7 m)
Longest span80 ft (24.3 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2023)
Projected traffic1,970 by 2046
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 km)
TollOn a free road
National Highway SystemYes

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 Ill 84 over Irish Hollow Creek built?

It was built in 1984, making it 41 years old in 2025. It was reconstructed in 2010.

What condition is Ill 84 over Irish Hollow Creek 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 October 2021.

How much traffic does Ill 84 over Irish Hollow Creek carry?

About 1,800 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is Ill 84 over Irish Hollow Creek?

The structure is 209 ft (63.7 m) long with a longest span of 80 ft (24.3 m) and a deck 35 ft wide.

Who owns Ill 84 over Irish Hollow Creek?

It is owned by the State Highway Agency.