US Bridges

Squaw Prairie RD over Beaver Creek

FairPosted for load

Boone County, Illinois · 2.5 MI NW Belvidere · Structure no. 004303900000000

Built
1959
66 years old, rebuilt 1999
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
125 ft
4 main spans
Daily traffic
1,650
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Squaw Prairie RD over Beaver Creek is a concrete continuous slab carrying Squaw Prairie RD over Beaver Creek in Boone County, Illinois. It was built in 1959 and reconstructed in 1999, so it is 66 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 1,650 vehicles a day, roughly 3% of them trucks, projected to reach 1,560 by 2046. The structure is 125 ft (38.1 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSquaw Prairie RD
CrossesBeaver Creek
Location2.5 MI NW Belvidere
CountyBoone County
StateIllinois
Coordinates42.29069, -88.90969
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length125 ft (38.1 m)
Longest span34 ft (10.4 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,650 (2023)
Projected traffic1,560 by 2046
Trucks3%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$239,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Squaw Prairie RD over Beaver Creek built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1999.

What condition is Squaw Prairie RD 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 September 2023.

How much traffic does Squaw Prairie RD over Beaver Creek carry?

About 1,650 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Squaw Prairie RD over Beaver Creek?

The structure is 125 ft (38.1 m) long with a longest span of 34 ft (10.4 m) and a deck 43 ft wide.

Who owns Squaw Prairie RD over Beaver Creek?

It is owned by the City or Municipal Highway Agency.