US Bridges

Newburg RD over Kishwaukee River

Fair

Boone County, Illinois · 3.5 MI W of Belvider · Structure no. 004301300000000

Built
1962
63 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
376 ft
5 main spans
Daily traffic
8,050
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

Newburg RD over Kishwaukee River is a steel continuous stringer/multi-beam or girder carrying Newburg RD over Kishwaukee River in Boone County, Illinois. It was built in 1962, so it is 63 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 8,050 vehicles a day, roughly 3% of them trucks, projected to reach 8,372 by 2046. The structure is 376 ft (114.5 m) long and 32 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesNewburg RD
CrossesKishwaukee River
Location3.5 MI W of Belvider
CountyBoone County
StateIllinois
Coordinates42.25396, -88.93081
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+2 approach)
Design loadHS 20
Structure length376 ft (114.5 m)
Longest span90 ft (27.4 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,050 (2018)
Projected traffic8,372 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Newburg RD over Kishwaukee River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Newburg RD over Kishwaukee River 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 Newburg RD over Kishwaukee River carry?

About 8,050 vehicles per day (2018 count), of which roughly 3% are trucks.

How long is Newburg RD over Kishwaukee River?

The structure is 376 ft (114.5 m) long with a longest span of 90 ft (27.4 m) and a deck 32 ft wide.

Who owns Newburg RD over Kishwaukee River?

It is owned by the City or Municipal Highway Agency.