US Bridges

Towanda AVE(FAU641 over I-55/N of Normal

Poor

McLean County, Illinois · 1.75 MI E of US 51 · Structure no. 057011800000000

Built
1962
63 years old
Condition
Poor
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
221 ft
4 main spans
Daily traffic
2,650
2024 count
Owner
State
State Highway Agency

About this bridge

Towanda AVE(FAU641 over I-55/N of Normal is a steel continuous stringer/multi-beam or girder carrying Towanda AVE(FAU641 over I-55/N of Normal in McLean 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 2,650 vehicles a day, roughly 6% of them trucks, projected to reach 2,778 by 2046. The structure is 221 ft (67.3 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTowanda AVE(FAU641
CrossesI-55/N of Normal
Location1.75 MI E of US 51
CountyMcLean County
StateIllinois
Coordinates40.53882, -88.96336
Functional classUrban 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.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.8 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length221 ft (67.3 m)
Longest span68 ft (20.6 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,650 (2024)
Projected traffic2,778 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Towanda AVE(FAU641 over I-55/N of Normal built?

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

What condition is Towanda AVE(FAU641 over I-55/N of Normal 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 Towanda AVE(FAU641 over I-55/N of Normal carry?

About 2,650 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Towanda AVE(FAU641 over I-55/N of Normal?

The structure is 221 ft (67.3 m) long with a longest span of 68 ft (20.6 m) and a deck 30 ft wide.

Who owns Towanda AVE(FAU641 over I-55/N of Normal?

It is owned by the State Highway Agency.