Martin Mill Road over Long Branch
Okaloosa County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Martin Mill Road over Long Branch in Okaloosa County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1984, making it 41 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2024).
- It is one of 126 of the 219 inventoried bridges in Okaloosa County rated fair (57.5%); 10 (4.6%) 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 → (30.83598, -86.77029)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 33 ft |
| Location | 0.7Mi W ovr Beaver Crk Rd |
| NBI structure number | 574071 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Okaloosa County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR85 Eglin Parkway over Cinco Bayou | 1958 | 52,000 | Fair |
| SR189 Beal Parkway over Five Mile Bayou | 2014 | 52,000 | Good |
| US98 SR30 over Cody Ave / Champaign St | 2015 | 50,000 | Good |
| US98 SR30 over ICWW & Brooks ST. | 1964 | 49,500 | Poor |
| SR85 over Boggy Bayou | 2001 | 47,500 | Fair |
| SR85 Eglin Parkway over Garniers Bayou | 1958 | 46,500 | Fair |
All bridges nearby: Okaloosa County, FL bridge conditions · every bridge in Okaloosa County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.