SR 605 over Biloxi River
Harrison County, Mississippi · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 605 over Biloxi River in Harrison County, Mississippi, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2007, making it 18 years old at the 2025 inventory.
- It carries about 5,500 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 159 of the 302 inventoried bridges in Harrison County rated good (52.6%); 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 May 2023, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (30.49006, -89.02898)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 3,158 ft |
| Location | 2.6 Mi N I 10 |
| NBI structure number | 31006050240076A |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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.