US Bridges

I-69 EB over Webb Drain

Good

Shiawassee County, Michigan · 2.7 MI SW of Genesee Col · Structure no. 000000000009738

Built
1961
64 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
64 ft
1 main span
Daily traffic
14,378
2007 count
Owner
State
State Highway Agency

About this bridge

I-69 EB over Webb Drain is a steel stringer/multi-beam or girder carrying I-69 EB over Webb Drain in Shiawassee County, Michigan. It was built in 1961, so it is 64 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,378 vehicles a day, roughly 20% of them trucks, projected to reach 15,340 by 2018. The structure is 64 ft (19.5 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-69 EB
CrossesWebb Drain
Location2.7 MI SW of Genesee Col
RouteInterstate 69
Coordinates42.95599, -83.96921
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating37.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length64 ft (19.5 m)
Longest span64 ft (19.5 m)
Deck width47 ft (14.3 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,378 (2007)
Projected traffic15,340 by 2018
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-69 EB over Webb Drain built?

It was built in 1961, making it 64 years old in 2025.

What condition is I-69 EB over Webb Drain in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does I-69 EB over Webb Drain carry?

About 14,378 vehicles per day (2007 count), of which roughly 20% are trucks.

How long is I-69 EB over Webb Drain?

The structure is 64 ft (19.5 m) long with a longest span of 64 ft (19.5 m) and a deck 47 ft wide.

Who owns I-69 EB over Webb Drain?

It is owned by the State Highway Agency.