120th Street over Black River
FairOttawa County, Michigan · 0.39 Miles S of Lakewood · Structure no. 000000000008820
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected September 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete
- Length
- 143 ft
- 3 main spans
- Daily traffic
- 20,280
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
120th Street over Black River is a prestressed concrete box beam or girders - single or spread carrying 120th Street over Black River in Ottawa County, Michigan. It was built in 1996, so it is 29 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 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 20,280 vehicles a day, roughly 5% of them trucks, projected to reach 36,630 by 2040. The structure is 143 ft (43.6 m) long and 74 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 120th Street over Black River built?
It was built in 1996, making it 29 years old in 2025.
What condition is 120th Street over Black River 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 September 2024.
How much traffic does 120th Street over Black River carry?
About 20,280 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is 120th Street over Black River?
The structure is 143 ft (43.6 m) long with a longest span of 48 ft (14.6 m) and a deck 74 ft wide.
Who owns 120th Street over Black River?
It is owned by the County Highway Agency.