4500 RD Mile 21 over Irish Creek
PoorPosted for loadMontgomery County, Kansas · 2.8S 3.0E of Sycamore · Structure no. 000631003006728
- Built
- 1970
- 55 years old
- Condition
- Poor
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 84 ft
- 3 main spans
- Daily traffic
- 40
- 2010 count
- Owner
- County
- County Highway Agency
About this bridge
4500 RD Mile 21 over Irish Creek is a steel continuous stringer/multi-beam or girder carrying 4500 RD Mile 21 over Irish Creek in Montgomery County, Kansas. It was built in 1970, so it is 55 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 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 40 vehicles a day, projected to reach 48 by 2039. The structure is 84 ft (25.6 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 4500 RD Mile 21 over Irish Creek built?
It was built in 1970, making it 55 years old in 2025.
What condition is 4500 RD Mile 21 over Irish 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 March 2023.
How much traffic does 4500 RD Mile 21 over Irish Creek carry?
About 40 vehicles per day (2010 count).
How long is 4500 RD Mile 21 over Irish Creek?
The structure is 84 ft (25.6 m) long with a longest span of 39 ft (11.8 m) and a deck 24 ft wide.
Who owns 4500 RD Mile 21 over Irish Creek?
It is owned by the County Highway Agency.