SR 605 over Industrial Waterway
Harrison County, Mississippi · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 605 over Industrial Waterway in Harrison County, Mississippi, 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 2002, making it 23 years old at the 2025 inventory.
- It carries about 34,000 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 126 of the 302 inventoried bridges in Harrison County rated fair (41.7%); 17 (5.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated June 2023, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (30.42279, -89.03196)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel movable bascule |
| Length | about 1,393 ft |
| Location | 3.5 Mi N US 90 |
| NBI structure number | 310060502400350 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Mississippi department of transportation.
Busiest bridges in Harrison County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 10 over Stream | 1969 | 75,000 | Good |
| I 10 over Stream | 1969 | 66,000 | Fair |
| I 10 over Flat Branch | 1969 | 53,000 | Good |
| I 10 over Delisle Bayou | 1969 | 49,000 | Good |
| I 10 over Parker Creek | 1970 | 47,000 | Good |
| I 10 over Parker Creek | 1970 | 47,000 | Good |
All bridges nearby: Harrison County, MS bridge conditions · every bridge in Harrison County · Mississippi bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.