Lake Irwin RD over Irwin Lake
PoorClosed to trafficMorehouse Parish, Louisiana · 3.2 Mi. NE Int. 505 · Structure no. 053432337915031
- Built
- 1978
- 47 years old
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 383 ft
- 16 main spans
- Daily traffic
- 150
- 1974 count
- Owner
- County
- County Highway Agency
About this bridge
Lake Irwin RD over Irwin Lake is a steel stringer/multi-beam or girder carrying Lake Irwin RD over Irwin Lake in Morehouse Parish, Louisiana. It was built in 1978, so it is 47 years old, older than the Louisiana average of 43 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 1 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: closed to all traffic.
It carries about 150 vehicles a day, projected to reach 165 by 1994. The structure is 383 ft (116.7 m) long and 24 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 1 Imminent Failure | Major deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service. |
| 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 Lake Irwin RD over Irwin Lake built?
It was built in 1978, making it 47 years old in 2025.
What condition is Lake Irwin RD over Irwin 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 September 2024.
How much traffic does Lake Irwin RD over Irwin Lake carry?
About 150 vehicles per day (1974 count).
How long is Lake Irwin RD over Irwin Lake?
The structure is 383 ft (116.7 m) long with a longest span of 57 ft (17.4 m) and a deck 24 ft wide.
Who owns Lake Irwin RD over Irwin Lake?
It is owned by the County Highway Agency.