Cth a over Koshkonong Creek
PoorPosted for loadDane County, Wisconsin · 2.3M E JCT Sth 73 · Structure no. B13005600000000
- Built
- 1956
- 69 years old
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 63 ft
- 1 main span
- Daily traffic
- 490
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Cth a over Koshkonong Creek is a steel stringer/multi-beam or girder carrying Cth a over Koshkonong Creek in Dane County, Wisconsin. It was built in 1956, so it is 69 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. Its operating status is: posted for load restriction.
It carries about 490 vehicles a day, projected to reach 588 by 2042. The structure is 63 ft (19.2 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cth a over Koshkonong Creek built?
It was built in 1956, making it 69 years old in 2025.
What condition is Cth a over Koshkonong Creek 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 October 2024.
How much traffic does Cth a over Koshkonong Creek carry?
About 490 vehicles per day (2022 count).
How long is Cth a over Koshkonong Creek?
The structure is 63 ft (19.2 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.
Who owns Cth a over Koshkonong Creek?
It is owned by the County Highway Agency.