US Bridges

US 30 over Cattail Creek

Fair

Whiteside County, Illinois · 1 Mi. E. of Il 136 · Structure no. 098201500000000

Built
1992
33 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
83 ft
2 main spans
Daily traffic
5,550
2023 count
Owner
State
State Highway Agency

About this bridge

US 30 over Cattail Creek is a concrete culvert carrying US 30 over Cattail Creek in Whiteside County, Illinois. It was built in 1992, so it is 33 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 5,550 vehicles a day, roughly 14% of them trucks, projected to reach 5,858 by 2046. The structure is 83 ft (25.3 m) long and 55 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesUS 30
CrossesCattail Creek
Location1 Mi. E. of Il 136
RouteU.S. Route 30
CountyWhiteside County
StateIllinois
Coordinates41.85839, -90.10004
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating83.9 US tons
Inventory rating50.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length83 ft (25.3 m)
Longest span40 ft (12.3 m)
Deck width55 ft (16.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,550 (2023)
Projected traffic5,858 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 US 30 over Cattail Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is US 30 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 December 2023.

How much traffic does US 30 over Cattail Creek carry?

About 5,550 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US 30 over Cattail Creek?

The structure is 83 ft (25.3 m) long with a longest span of 40 ft (12.3 m) and a deck 55 ft wide.

Who owns US 30 over Cattail Creek?

It is owned by the State Highway Agency.