US Bridges

FAS-188 (CH-15) over Five Mile Branch

Poor

Lee County, Illinois · 1.0M S of US-30 · Structure no. 052332300000000

Built
1962
63 years old
Condition
Poor
inspected February 2025
Type
Slab
Concrete Continuous
Length
89 ft
3 main spans
Daily traffic
450
2022 count
Owner
County
County Highway Agency

About this bridge

FAS-188 (CH-15) over Five Mile Branch is a concrete continuous slab carrying FAS-188 (CH-15) over Five Mile Branch in Lee County, Illinois. It was built in 1962, so it is 63 years old, older 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 450 vehicles a day, roughly 10% of them trucks, projected to reach 657 by 2046. The structure is 89 ft (27.2 m) long and 30 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesFAS-188 (CH-15)
CrossesFive Mile Branch
Location1.0M S of US-30
RouteCounty Highway 0
CountyLee County
StateIllinois
Coordinates41.74419, -89.55434
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length89 ft (27.2 m)
Longest span33 ft (10.2 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2022)
Projected traffic657 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 FAS-188 (CH-15) over Five Mile Branch built?

It was built in 1962, making it 63 years old in 2025.

What condition is FAS-188 (CH-15) over Five Mile Branch 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 February 2025.

How much traffic does FAS-188 (CH-15) over Five Mile Branch carry?

About 450 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is FAS-188 (CH-15) over Five Mile Branch?

The structure is 89 ft (27.2 m) long with a longest span of 33 ft (10.2 m) and a deck 30 ft wide.

Who owns FAS-188 (CH-15) over Five Mile Branch?

It is owned by the County Highway Agency.