300 TH over Greenbrier Creek
PoorPosted for loadGreene County, Iowa · 082311401 · Structure no. 000000000161900
- Built
- 1957
- 68 years old
- Condition
- Poor
- inspected July 2024
- Type
- Slab
- Concrete Continuous
- Length
- 77 ft
- 3 main spans
- Daily traffic
- 15
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
300 TH over Greenbrier Creek is a concrete continuous slab carrying 300 TH over Greenbrier Creek in Greene County, Iowa. It was built in 1957, so it is 68 years old, older than the Iowa average of 45.5 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 15 vehicles a day, projected to reach 15 by 2044. The structure is 77 ft (23.5 m) long and 22 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 300 TH over Greenbrier Creek built?
It was built in 1957, making it 68 years old in 2025.
What condition is 300 TH over Greenbrier 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 July 2024.
How much traffic does 300 TH over Greenbrier Creek carry?
About 15 vehicles per day (2022 count).
How long is 300 TH over Greenbrier Creek?
The structure is 77 ft (23.5 m) long with a longest span of 29 ft (8.8 m) and a deck 22 ft wide.
Who owns 300 TH over Greenbrier Creek?
It is owned by the County Highway Agency.