County RD S-21 over Spring CR
PoorPosted for loadPolk County, Missouri · S 5 T 34 N R 24 W · Structure no. 15979
- Built
- 1900
- 125 years old
- Condition
- Poor
- inspected April 2024
- Type
- Slab
- Concrete Continuous
- Length
- 28 ft
- 2 main spans
- Daily traffic
- 40
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
County RD S-21 over Spring CR is a concrete continuous slab carrying County RD S-21 over Spring CR in Polk County, Missouri. It was built in 1900, so it is 125 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 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 58 by 2044. The structure is 28 ft (8.5 m) long and 15 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County RD S-21 over Spring CR built?
It was built in 1900, making it 125 years old in 2025.
What condition is County RD S-21 over Spring 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 April 2024.
How much traffic does County RD S-21 over Spring CR carry?
About 40 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is County RD S-21 over Spring CR?
The structure is 28 ft (8.5 m) long with a longest span of 13 ft (4 m) and a deck 15 ft wide.
Who owns County RD S-21 over Spring CR?
It is owned by the County Highway Agency.