US 12 over N Br Nippersink Crk
PoorMcHenry County, Illinois · 0.5 M S E of Il 31 · Structure no. 056005600000000
- Built
- 1990
- 35 years old
- Condition
- Poor
- inspected July 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 131 ft
- 3 main spans
- Daily traffic
- 8,250
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over N Br Nippersink Crk is a prestressed concrete box beam or girders - multiple carrying US 12 over N Br Nippersink Crk in McHenry County, Illinois. It was built in 1990, so it is 35 years old, younger than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 8,250 vehicles a day, roughly 7% of them trucks, projected to reach 10,320 by 2046. The structure is 131 ft (39.8 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 12 over N Br Nippersink Crk built?
It was built in 1990, making it 35 years old in 2025.
What condition is US 12 over N Br Nippersink Crk in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.
How much traffic does US 12 over N Br Nippersink Crk carry?
About 8,250 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is US 12 over N Br Nippersink Crk?
The structure is 131 ft (39.8 m) long with a longest span of 50 ft (15.2 m) and a deck 43 ft wide.
Who owns US 12 over N Br Nippersink Crk?
It is owned by the State Highway Agency.