Sth 100 Sb-S 108th over Root River
FairMilwaukee County, Wisconsin · 0.2M S JCT Cth T · Structure no. B40031800000000
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 14,200
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Sth 100 Sb-S 108th over Root River is a concrete continuous slab carrying Sth 100 Sb-S 108th over Root River in Milwaukee County, Wisconsin. It was built in 1968, so it is 57 years old, older than the Wisconsin average of 40.3 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 14,200 vehicles a day, roughly 3% of them trucks, projected to reach 20,971 by 2043. The structure is 112 ft (34.2 m) long and 46 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 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 Sth 100 Sb-S 108th over Root River built?
It was built in 1968, making it 57 years old in 2025.
What condition is Sth 100 Sb-S 108th over Root 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 Sth 100 Sb-S 108th over Root River carry?
About 14,200 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is Sth 100 Sb-S 108th over Root River?
The structure is 112 ft (34.2 m) long with a longest span of 45 ft (13.7 m) and a deck 46 ft wide.
Who owns Sth 100 Sb-S 108th over Root River?
It is owned by the State Highway Agency.