US Bridges

Hahnaman RD over Winnebago Drainage D

Fair

Whiteside County, Illinois · 1 Mi.N of Deer Grove · Structure no. 098300500000000

Built
1963
62 years old, rebuilt 2000
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
122 ft
3 main spans
Daily traffic
250
2021 count
Owner
County
County Highway Agency

About this bridge

Hahnaman RD over Winnebago Drainage D is a steel continuous stringer/multi-beam or girder carrying Hahnaman RD over Winnebago Drainage D in Whiteside County, Illinois. It was built in 1963 and reconstructed in 2000, so it is 62 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 6 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 250 vehicles a day, roughly 23% of them trucks, projected to reach 253 by 2046. The structure is 122 ft (37.1 m) long and 30 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

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CarriesHahnaman RD
CrossesWinnebago Drainage D
Location1 Mi.N of Deer Grove
RouteCounty Highway 0
CountyWhiteside County
StateIllinois
Coordinates41.62816, -89.68751
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length122 ft (37.1 m)
Longest span43 ft (13.1 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2021)
Projected traffic253 by 2046
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$273,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hahnaman RD over Winnebago Drainage D built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2000.

What condition is Hahnaman RD over Winnebago Drainage D 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 2024.

How much traffic does Hahnaman RD over Winnebago Drainage D carry?

About 250 vehicles per day (2021 count), of which roughly 23% are trucks.

How long is Hahnaman RD over Winnebago Drainage D?

The structure is 122 ft (37.1 m) long with a longest span of 43 ft (13.1 m) and a deck 30 ft wide.

Who owns Hahnaman RD over Winnebago Drainage D?

It is owned by the County Highway Agency.