US Bridges

County Highway 4 over Zuma Creek

Good

Rock Island County, Illinois · 2 MI SW of Joslin · Structure no. 081500700000000

Built
1978
47 years old
Condition
Good
inspected November 2022
Type
Culvert
Concrete
Length
26 ft
2 main spans
Daily traffic
175
2020 count
Owner
County
County Highway Agency

About this bridge

County Highway 4 over Zuma Creek is a concrete culvert carrying County Highway 4 over Zuma Creek in Rock Island County, Illinois. It was built in 1978, so it is 47 years old, older 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 175 vehicles a day, roughly 24% of them trucks, projected to reach 177 by 2046. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCounty Highway 4
CrossesZuma Creek
Location2 MI SW of Joslin
RouteCounty Highway 0
CountyRock Island County
StateIllinois
Coordinates41.54516, -90.25283
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating98.2 US tons
Inventory rating62.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2020)
Projected traffic177 by 2046
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 County Highway 4 over Zuma Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is County Highway 4 over Zuma 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 County Highway 4 over Zuma Creek carry?

About 175 vehicles per day (2020 count), of which roughly 24% are trucks.

How long is County Highway 4 over Zuma Creek?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m).

Who owns County Highway 4 over Zuma Creek?

It is owned by the County Highway Agency.