US Bridges

4th ST over Pope Creek

Poor

Mercer County, Illinois · In Keithsburg · Structure no. 066001400000000

Built
1989
36 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
146 ft
3 main spans
Daily traffic
650
2024 count
Owner
State
State Highway Agency

About this bridge

4th ST over Pope Creek is a steel continuous stringer/multi-beam or girder carrying 4th ST over Pope Creek in Mercer County, Illinois. It was built in 1989, so it is 36 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 650 vehicles a day, roughly 9% of them trucks, projected to reach 960 by 2046. The structure is 146 ft (44.5 m) long and 34 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
Carries4th ST
CrossesPope Creek
LocationIn Keithsburg
RouteCounty Highway 0
CountyMercer County
StateIllinois
Coordinates41.10594, -90.94277
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span56 ft (17.1 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2024)
Projected traffic960 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 4th ST over Pope Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is 4th ST over Pope Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does 4th ST over Pope Creek carry?

About 650 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is 4th ST over Pope Creek?

The structure is 146 ft (44.5 m) long with a longest span of 56 ft (17.1 m) and a deck 34 ft wide.

Who owns 4th ST over Pope Creek?

It is owned by the State Highway Agency.