US Bridges

I-475 over Gilkey Creek

Fair

Genesee County, Michigan · S of Stever RD · Structure no. 000000000002640

Built
1976
49 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
63,400
2007 count
Owner
State
State Highway Agency

About this bridge

I-475 over Gilkey Creek is a concrete culvert carrying I-475 over Gilkey Creek in Genesee County, Michigan. It was built in 1976, so it is 49 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 63,400 vehicles a day, roughly 2% of them trucks, projected to reach 78,521 by 2018. The structure is 23 ft (7 m) long.

CarriesI-475
CrossesGilkey Creek
LocationS of Stever RD
RouteInterstate 475
Coordinates43.03085, -83.67774
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 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating65.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic63,400 (2007)
Projected traffic78,521 by 2018
Trucks2%
Lanes on structure12
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 Gilkey Creek built?

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

What condition is I-475 over Gilkey Creek 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 Gilkey Creek carry?

About 63,400 vehicles per day (2007 count), of which roughly 2% are trucks.

How long is I-475 over Gilkey Creek?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m).

Who owns I-475 over Gilkey Creek?

It is owned by the State Highway Agency.