US Bridges

18 Mile Road over Duke Creek

Fair

Kent County, Michigan · 0.40 MI E of Simmons Ave · Structure no. 000000000005160

Built
1968
57 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
33 ft
3 main spans
Daily traffic
2,318
2005 count
Owner
County
County Highway Agency

About this bridge

18 Mile Road over Duke Creek is a steel culvert carrying 18 Mile Road over Duke Creek in Kent County, Michigan. It was built in 1968, so it is 57 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 5 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 2,318 vehicles a day, projected to reach 3,940 by 2025. The structure is 33 ft (10 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries18 Mile Road
CrossesDuke Creek
Location0.40 MI E of Simmons Ave
RouteCounty Highway 0
CountyKent County
StateMichigan
Coordinates43.23426, -85.58313
Functional classRural Minor 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating52.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length33 ft (10 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,318 (2005)
Projected traffic3,940 by 2025
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 18 Mile Road over Duke Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is 18 Mile Road over Duke 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 October 2024.

How much traffic does 18 Mile Road over Duke Creek carry?

About 2,318 vehicles per day (2005 count).

How long is 18 Mile Road over Duke Creek?

The structure is 33 ft (10 m) long with a longest span of 12 ft (3.6 m).

Who owns 18 Mile Road over Duke Creek?

It is owned by the County Highway Agency.