IH 43 NB over Root River Marsh
PoorMilwaukee County, Wisconsin · 0.7 MI North JCT Sth 100/ · Structure no. B40032200000000
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 364 ft
- 7 main spans
- Daily traffic
- 18,200
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
IH 43 NB over Root River Marsh is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 NB over Root River Marsh in Milwaukee County, Wisconsin. It was built in 1966, so it is 59 years old, older than the Wisconsin average of 40.3 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 18,200 vehicles a day, roughly 1% of them trucks, projected to reach 59,685 by 2043. The structure is 364 ft (110.8 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IH 43 NB over Root River Marsh built?
It was built in 1966, making it 59 years old in 2025.
What condition is IH 43 NB over Root River Marsh 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 May 2024.
How much traffic does IH 43 NB over Root River Marsh carry?
About 18,200 vehicles per day (2021 count), of which roughly 1% are trucks.
How long is IH 43 NB over Root River Marsh?
The structure is 364 ft (110.8 m) long with a longest span of 52 ft (15.7 m) and a deck 22 ft wide.
Who owns IH 43 NB over Root River Marsh?
It is owned by the State Highway Agency.