US Bridges

Ch 31 over Five Mile Branch

Fair

Lee County, Illinois · .9 MI E of SR 26 · Structure no. 052500000000000

Built
1932
93 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
150
2022 count
Owner
County
County Highway Agency

About this bridge

Ch 31 over Five Mile Branch is a concrete culvert carrying Ch 31 over Five Mile Branch in Lee County, Illinois. It was built in 1932, so it is 93 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 5 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 150 vehicles a day, roughly 57% of them trucks, projected to reach 152 by 2046. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCh 31
CrossesFive Mile Branch
Location.9 MI E of SR 26
RouteCounty Highway 0
CountyLee County
StateIllinois
Coordinates41.77265, -89.44049
Functional classRural 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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length23 ft (7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic152 by 2046
Trucks57%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Ch 31 over Five Mile Branch built?

It was built in 1932, making it 93 years old in 2025.

What condition is Ch 31 over Five Mile Branch 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 February 2024.

How much traffic does Ch 31 over Five Mile Branch carry?

About 150 vehicles per day (2022 count), of which roughly 57% are trucks.

How long is Ch 31 over Five Mile Branch?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m).

Who owns Ch 31 over Five Mile Branch?

It is owned by the County Highway Agency.