US Bridges

Seavey RD over Blackberry Creek

Fair

Kane County, Illinois · 0.6 MI NW Finley RD · Structure no. 045311700000000

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
88 ft
3 main spans
Daily traffic
50
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Seavey RD over Blackberry Creek is a concrete continuous slab carrying Seavey RD over Blackberry Creek in Kane County, Illinois. It was built in 1971, so it is 54 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.

It carries about 50 vehicles a day, roughly 20% of them trucks, projected to reach 61 by 2046. The structure is 88 ft (26.7 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSeavey RD
CrossesBlackberry Creek
Location0.6 MI NW Finley RD
RouteCounty Highway 0
CountyKane County
StateIllinois
Coordinates41.82262, -88.47577
Functional classUrban Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.5 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length88 ft (26.7 m)
Longest span32 ft (9.9 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic61 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Seavey RD over Blackberry Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Seavey RD over Blackberry 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 May 2023.

How much traffic does Seavey RD over Blackberry Creek carry?

About 50 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Seavey RD over Blackberry Creek?

The structure is 88 ft (26.7 m) long with a longest span of 32 ft (9.9 m) and a deck 30 ft wide.

Who owns Seavey RD over Blackberry Creek?

It is owned by the Town or Township Highway Agency.