US Bridges

Coltonville Road over Kishwaukee River

Good

DeKalb County, Illinois · 2370N 1135E · Structure no. 019307200000000

Built
2016
9 years old
Condition
Good
inspected July 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
229 ft
4 main spans
Daily traffic
5,250
2021 count
Owner
County
County Highway Agency

About this bridge

Coltonville Road over Kishwaukee River is a steel stringer/multi-beam or girder carrying Coltonville Road over Kishwaukee River in DeKalb County, Illinois. It was built in 2016, so it is 9 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,250 vehicles a day, roughly 7% of them trucks, projected to reach 5,880 by 2046. The structure is 229 ft (69.9 m) long and 53 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesColtonville Road
CrossesKishwaukee River
Location2370N 1135E
CountyDeKalb County
StateIllinois
Coordinates41.97541, -88.72802
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 25 or greater
Structure length229 ft (69.9 m)
Longest span68 ft (20.7 m)
Deck width53 ft (16.2 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,250 (2021)
Projected traffic5,880 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Coltonville Road over Kishwaukee River built?

It was built in 2016, making it 9 years old in 2025.

What condition is Coltonville Road over Kishwaukee River 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 July 2022.

How much traffic does Coltonville Road over Kishwaukee River carry?

About 5,250 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Coltonville Road over Kishwaukee River?

The structure is 229 ft (69.9 m) long with a longest span of 68 ft (20.7 m) and a deck 53 ft wide.

Who owns Coltonville Road over Kishwaukee River?

It is owned by the County Highway Agency.