US Bridges

Riverside Road over Beaver Creek

Fair

Boone County, Illinois · 4.0 MI NW Belvidere · Structure no. 004308000000000

Built
1988
37 years old
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
108 ft
2 main spans
Daily traffic
2,350
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Riverside Road over Beaver Creek is a prestressed concrete box beam or girders - multiple carrying Riverside Road over Beaver Creek in Boone County, Illinois. It was built in 1988, so it is 37 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 2,350 vehicles a day, roughly 7% of them trucks, projected to reach 2,808 by 2046. The structure is 108 ft (32.9 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRiverside Road
CrossesBeaver Creek
Location4.0 MI NW Belvidere
CountyBoone County
StateIllinois
Coordinates42.30824, -88.90186
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
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 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 rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span54 ft (16.5 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,350 (2023)
Projected traffic2,808 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Riverside Road over Beaver Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Riverside Road over Beaver 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 2023.

How much traffic does Riverside Road over Beaver Creek carry?

About 2,350 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Riverside Road over Beaver Creek?

The structure is 108 ft (32.9 m) long with a longest span of 54 ft (16.5 m) and a deck 28 ft wide.

Who owns Riverside Road over Beaver Creek?

It is owned by the Town or Township Highway Agency.