US Bridges

I-475 over Lake Drain

Fair

Genesee County, Michigan · 0.2 MI E of Clio RD · Structure no. 000000000002639

Built
1973
52 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
26,600
2007 count
Owner
State
State Highway Agency

About this bridge

I-475 over Lake Drain is a concrete culvert carrying I-475 over Lake Drain in Genesee County, Michigan. It was built in 1973, so it is 52 years old, older 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 26,600 vehicles a day, roughly 8% of them trucks, projected to reach 28,209 by 2018. The structure is 22 ft (6.8 m) long.

CarriesI-475
CrossesLake Drain
Location0.2 MI E of Clio RD
RouteInterstate 475
Coordinates43.09801, -83.72675
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating38.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,600 (2007)
Projected traffic28,209 by 2018
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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-475 over Lake Drain built?

It was built in 1973, making it 52 years old in 2025.

What condition is I-475 over Lake Drain 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 July 2024.

How much traffic does I-475 over Lake Drain carry?

About 26,600 vehicles per day (2007 count), of which roughly 8% are trucks.

How long is I-475 over Lake Drain?

The structure is 22 ft (6.8 m) long with a longest span of 10 ft (3 m).

Who owns I-475 over Lake Drain?

It is owned by the State Highway Agency.