US Bridges

US RTE 20 over Coolidge Creek

Good

Winnebago County, Illinois · 4 MI E Pecatonica RD · Structure no. 101100600000000

Built
2003
22 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
14,600
2023 count
Owner
State
State Highway Agency

About this bridge

US RTE 20 over Coolidge Creek is a concrete culvert carrying US RTE 20 over Coolidge Creek in Winnebago County, Illinois. It was built in 2003, so it is 22 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 14,600 vehicles a day, roughly 15% of them trucks, projected to reach 16,059 by 2046. The structure is 28 ft (8.6 m) long and 137 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS RTE 20
CrossesCoolidge Creek
Location4 MI E Pecatonica RD
RouteU.S. Route 20
CountyWinnebago County
StateIllinois
Coordinates42.28361, -89.27871
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length28 ft (8.6 m)
Longest span13 ft (4 m)
Deck width137 ft (41.8 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,600 (2023)
Projected traffic16,059 by 2046
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 RTE 20 over Coolidge Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is US RTE 20 over Coolidge 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 December 2023.

How much traffic does US RTE 20 over Coolidge Creek carry?

About 14,600 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US RTE 20 over Coolidge Creek?

The structure is 28 ft (8.6 m) long with a longest span of 13 ft (4 m) and a deck 137 ft wide.

Who owns US RTE 20 over Coolidge Creek?

It is owned by the State Highway Agency.