399th ST over LA Cygne Lake
PoorPosted for loadMiami County, Kansas · 4.4E 4.0S New Lancaster · Structure no. 000611109405200
- Built
- 1962
- 63 years old
- Condition
- Poor
- inspected June 2024
- Type
- Truss - Thru
- Steel
- Length
- 104 ft
- 1 main span
- Daily traffic
- 95
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
399th ST over LA Cygne Lake is a steel truss - thru carrying 399th ST over LA Cygne Lake in Miami County, Kansas. It was built in 1962, so it is 63 years old, older than the Kansas average of 52.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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 95 vehicles a day, roughly 1% of them trucks, projected to reach 98 by 2043. The structure is 104 ft (31.7 m) long and 22 ft wide. If it were closed, the detour would be 13 mi (21 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 399th ST over LA Cygne Lake built?
It was built in 1962, making it 63 years old in 2025.
What condition is 399th ST over LA Cygne Lake 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 June 2024.
How much traffic does 399th ST over LA Cygne Lake carry?
About 95 vehicles per day (2015 count), of which roughly 1% are trucks.
How long is 399th ST over LA Cygne Lake?
The structure is 104 ft (31.7 m) long with a longest span of 100 ft (30.5 m) and a deck 22 ft wide.
Who owns 399th ST over LA Cygne Lake?
It is owned by the County Highway Agency.