US Bridges

284th Street over Copperas Creek

Good

Rock Island County, Illinois · 4 M SW Illinois City · Structure no. 081310400000000

Built
1987
38 years old
Condition
Good
inspected November 2022
Type
Box Beam or Girders - Multiple
Steel
Length
166 ft
3 main spans
Daily traffic
100
2020 count
Owner
County
County Highway Agency

About this bridge

284th Street over Copperas Creek is a steel box beam or girders - multiple carrying 284th Street over Copperas Creek in Rock Island County, Illinois. It was built in 1987, so it is 38 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 20% of them trucks, projected to reach 101 by 2046. The structure is 166 ft (50.6 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Carries284th Street
CrossesCopperas Creek
Location4 M SW Illinois City
RouteCounty Highway 0
Coordinates41.37359, -90.9657
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating100.8 US tons
Inventory rating43.5 US tons

Structure

MaterialSteel
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length166 ft (50.6 m)
Longest span71 ft (21.6 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic101 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 284th Street over Copperas Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is 284th Street over Copperas Creek 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 November 2022.

How much traffic does 284th Street over Copperas Creek carry?

About 100 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is 284th Street over Copperas Creek?

The structure is 166 ft (50.6 m) long with a longest span of 71 ft (21.6 m) and a deck 36 ft wide.

Who owns 284th Street over Copperas Creek?

It is owned by the County Highway Agency.