US Bridges

Hardin Ave over Town Brook

Fair

Morgan County, Illinois · On Hardin at Brook · Structure no. 069600200000000

Built
1976
49 years old
Condition
Fair
inspected May 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
2,300
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hardin Ave over Town Brook is a prestressed concrete box beam or girders - multiple carrying Hardin Ave over Town Brook in Morgan County, Illinois. It was built in 1976, so it is 49 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 2,300 vehicles a day, roughly 4% of them trucks, projected to reach 3,131 by 2046. The structure is 47 ft (14.3 m) long and 54 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHardin Ave
CrossesTown Brook
LocationOn Hardin at Brook
CountyMorgan County
StateIllinois
Coordinates39.72964, -90.22109
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span45 ft (13.7 m)
Deck width54 ft (16.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2024)
Projected traffic3,131 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Hardin Ave over Town Brook built?

It was built in 1976, making it 49 years old in 2025.

What condition is Hardin Ave over Town Brook 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 May 2022.

How much traffic does Hardin Ave over Town Brook carry?

About 2,300 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Hardin Ave over Town Brook?

The structure is 47 ft (14.3 m) long with a longest span of 45 ft (13.7 m) and a deck 54 ft wide.

Who owns Hardin Ave over Town Brook?

It is owned by the City or Municipal Highway Agency.