US Bridges

Dunckel Road over I-496

Fair

Ingham County, Michigan · In Lansing · Structure no. 000000000003785

Built
2009
16 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
232 ft
2 main spans
Daily traffic
20,055
2019 count
Owner
State
State Highway Agency

About this bridge

Dunckel Road over I-496 is a prestressed concrete box beam or girders - single or spread carrying Dunckel Road over I-496 in Ingham County, Michigan. It was built in 2009, so it is 16 years old, younger than the Michigan average of 48.3 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 20,055 vehicles a day, roughly 4% of them trucks, projected to reach 22,830 by 2039. The structure is 232 ft (70.8 m) long and 70 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesDunckel Road
CrossesI-496
LocationIn Lansing
RouteCity Street 0
CountyIngham County
StateMichigan
Coordinates42.68949, -84.50292
Functional classUrban Minor Arterial

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.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating37.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length232 ft (70.8 m)
Longest span114 ft (34.8 m)
Deck width70 ft (21.3 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,055 (2019)
Projected traffic22,830 by 2039
Trucks4%
Lanes on structure4
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Dunckel Road over I-496 built?

It was built in 2009, making it 16 years old in 2025.

What condition is Dunckel Road over I-496 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 August 2023.

How much traffic does Dunckel Road over I-496 carry?

About 20,055 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Dunckel Road over I-496?

The structure is 232 ft (70.8 m) long with a longest span of 114 ft (34.8 m) and a deck 70 ft wide.

Who owns Dunckel Road over I-496?

It is owned by the State Highway Agency.