Zirlot Road over Bayou Grande
Mobile County, Alabama · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Zirlot Road over Bayou Grande in Mobile County, Alabama, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1991, making it 34 years old at the 2025 inventory.
- It carries about 56 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 464 of the 609 inventoried bridges in Mobile County rated fair (76.2%); 15 (2.5%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (30.38906, -88.13646)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete channel beam |
| Length | about 67 ft |
| Location | 1.6 Mi N Hwy 188 |
| NBI structure number | 015365 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Alabama department of transportation.
Busiest bridges in Mobile County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-65 over Old Shell Rd | 1962 | 97,939 | Fair |
| I-65 over Spring Hill Ave | 1962 | 97,939 | Fair |
| I-10 WB * EB over Branch | 1964 | 96,938 | Fair |
| I-10 WB * EB over Halls Mill Creek | 1964 | 96,938 | Fair |
| I-10 WB * EB over Moores Creek | 1964 | 96,938 | Fair |
| I-65 over Three Mile Creek | 1962 | 92,601 | Fair |
All bridges nearby: Mobile County, AL bridge conditions · every bridge in Mobile County · Alabama bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.