Natchez Trace Park over Twenty Mile Slough
Itawamba County, Mississippi · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Natchez Trace Park over Twenty Mile Slough in Itawamba 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 1977, making it 48 years old at the 2025 inventory.
- It carries about 1,200 vehicles a day (traffic count year 2024).
- It is one of 143 of the 232 inventoried bridges in Itawamba County rated good (61.6%); 8 (3.4%) 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 February 2025, 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 → (34.43497, -88.53558)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 207 ft |
| Location | 2.8 Miles South of Ms Rou |
| NBI structure number | 5570226P0000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2025 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Mississippi department of transportation.
Busiest bridges in Itawamba County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 22 over Relief | 1983 | 26,000 | Good |
| I 22 over Johns Creek | 1989 | 16,000 | Good |
| I 22 over Big Oak Road | 1984 | 15,000 | Good |
| I 22 over Big Oak Road | 1984 | 15,000 | Good |
| I 22 over Tombigbee River | 1984 | 15,000 | Fair |
| I 22 over Tombigbee River | 1984 | 15,000 | Good |
All bridges nearby: Itawamba County, MS bridge conditions · every bridge in Itawamba County · Mississippi bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.