US Bridges

Il 84 over Cattail Creek

Fair

Whiteside County, Illinois · 0.9 MI S JCT US 30 · Structure no. 098011400000000

Built
2008
17 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
105 ft
3 main spans
Daily traffic
3,950
2023 count
Owner
State
State Highway Agency

About this bridge

Il 84 over Cattail Creek is a concrete continuous slab carrying Il 84 over Cattail Creek in Whiteside County, Illinois. It was built in 2008, so it is 17 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 3,950 vehicles a day, roughly 7% of them trucks, projected to reach 4,596 by 2046. The structure is 105 ft (32 m) long and 43 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIl 84
CrossesCattail Creek
Location0.9 MI S JCT US 30
RouteState Highway 84
CountyWhiteside County
StateIllinois
Coordinates41.83072, -90.16023
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length105 ft (32 m)
Longest span37 ft (11.3 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,950 (2023)
Projected traffic4,596 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Il 84 over Cattail Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is Il 84 over Cattail 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 September 2023.

How much traffic does Il 84 over Cattail Creek carry?

About 3,950 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 84 over Cattail Creek?

The structure is 105 ft (32 m) long with a longest span of 37 ft (11.3 m) and a deck 43 ft wide.

Who owns Il 84 over Cattail Creek?

It is owned by the State Highway Agency.