US Bridges

Ch 19 Extension Il over Willow Branch

Poor

Macon County, Illinois · N Edge of Niantic · Structure no. 058322400000000

Built
1978
47 years old
Condition
Poor
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
80 ft
2 main spans
Daily traffic
700
2020 count
Owner
County
County Highway Agency

About this bridge

Ch 19 Extension Il over Willow Branch is a prestressed concrete box beam or girders - multiple carrying Ch 19 Extension Il over Willow Branch in Macon 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 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 700 vehicles a day, roughly 20% of them trucks, projected to reach 707 by 2046. The structure is 80 ft (24.4 m) long and 28 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesCh 19 Extension Il
CrossesWillow Branch
LocationN Edge of Niantic
RouteCounty Highway 0
Coordinates39.85906, -89.16118
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 inspectionDecember 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating22.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span39 ft (11.8 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2020)
Projected traffic707 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 19 Extension Il over Willow Branch built?

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

What condition is Ch 19 Extension Il over Willow 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 December 2023.

How much traffic does Ch 19 Extension Il over Willow Branch carry?

About 700 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is Ch 19 Extension Il over Willow Branch?

The structure is 80 ft (24.4 m) long with a longest span of 39 ft (11.8 m) and a deck 28 ft wide.

Who owns Ch 19 Extension Il over Willow Branch?

It is owned by the County Highway Agency.