US Bridges

US Rt 30 over Elkhorn Creek

Fair

Whiteside County, Illinois · .58 MI W of Como RD · Structure no. 098003300000000

Built
1940
85 years old, rebuilt 1984
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
447 ft
6 main spans
Daily traffic
5,300
2023 count
Owner
State
State Highway Agency

About this bridge

US Rt 30 over Elkhorn Creek is a steel stringer/multi-beam or girder carrying US Rt 30 over Elkhorn Creek in Whiteside County, Illinois. It was built in 1940 and reconstructed in 1984, so it is 85 years old, older 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 5 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 5,300 vehicles a day, roughly 11% of them trucks, projected to reach 4,798 by 2046. The structure is 447 ft (136.3 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS Rt 30
CrossesElkhorn Creek
Location.58 MI W of Como RD
RouteU.S. Route 30
CountyWhiteside County
StateIllinois
Coordinates41.77225, -89.77162
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating78.9 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length447 ft (136.3 m)
Longest span90 ft (27.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2023)
Projected traffic4,798 by 2046
Trucks11%
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

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 Rt 30 over Elkhorn Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1984.

What condition is US Rt 30 over Elkhorn 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 July 2024.

How much traffic does US Rt 30 over Elkhorn Creek carry?

About 5,300 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is US Rt 30 over Elkhorn Creek?

The structure is 447 ft (136.3 m) long with a longest span of 90 ft (27.4 m) and a deck 43 ft wide.

Who owns US Rt 30 over Elkhorn Creek?

It is owned by the State Highway Agency.