US Bridges

Ch 18(SCHOOL Rd) over Friends Creek

Poor

Macon County, Illinois · 1.5 MI N Argenta · Structure no. 058323800000000

Built
1977
48 years old
Condition
Poor
inspected January 2025
Type
Channel Beam
Concrete
Length
110 ft
3 main spans
Daily traffic
200
2020 count
Owner
County
County Highway Agency

About this bridge

Ch 18(SCHOOL Rd) over Friends Creek is a concrete channel beam carrying Ch 18(SCHOOL Rd) over Friends Creek in Macon County, Illinois. It was built in 1977, so it is 48 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 3 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 202 by 2046. The structure is 110 ft (33.5 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCh 18(SCHOOL Rd)
CrossesFriends Creek
Location1.5 MI N Argenta
RouteCounty Highway 0
Coordinates40.01186, -88.80178
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating35.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span35 ft (10.8 m)
Deck width26 ft (8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2020)
Projected traffic202 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 18(SCHOOL Rd) over Friends Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Ch 18(SCHOOL Rd) over Friends 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 January 2025.

How much traffic does Ch 18(SCHOOL Rd) over Friends Creek carry?

About 200 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Ch 18(SCHOOL Rd) over Friends Creek?

The structure is 110 ft (33.5 m) long with a longest span of 35 ft (10.8 m) and a deck 26 ft wide.

Who owns Ch 18(SCHOOL Rd) over Friends Creek?

It is owned by the County Highway Agency.