County RD 399 over Mill CR
PoorPosted for loadAndrew County, Missouri · S 27 T 59 N R 36 W · Structure no. 23266
- Built
- 1925
- 100 years old
- Condition
- Poor
- inspected January 2025
- Type
- Truss - Thru
- Steel
- Length
- 71 ft
- 1 main span
- Daily traffic
- 30
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
County RD 399 over Mill CR is a steel truss - thru carrying County RD 399 over Mill CR in Andrew County, Missouri. It was built in 1925, so it is 100 years old, older than the Missouri average of 45.1 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 30 vehicles a day, roughly 10% of them trucks, projected to reach 35 by 2044. The structure is 71 ft (21.6 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 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 County RD 399 over Mill CR built?
It was built in 1925, making it 100 years old in 2025.
What condition is County RD 399 over Mill CR 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 January 2025.
How much traffic does County RD 399 over Mill CR carry?
About 30 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is County RD 399 over Mill CR?
The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 19 ft wide.
Who owns County RD 399 over Mill CR?
It is owned by the County Highway Agency.