CR 178 over Mare Branch
Santa Rosa County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- CR 178 over Mare Branch in Santa Rosa County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1901 and reconstructed in 1971, making it 124 years old at the 2025 inventory.
- It carries about 350 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 127 of the 194 inventoried bridges in Santa Rosa County rated fair (65.5%); 14 (7.2%) 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 → (30.83509, -87.0861)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 38 ft |
| Location | 2.22 Mi West of SR 87 |
| NBI structure number | 580067 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Santa Rosa County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I10 SR8 over Indian Bayou Tributary | 1968 | 68,000 | Fair |
| I10 SR8 over Sandy Point | 1967 | 47,500 | Fair |
| I10 SR8 over SR281 | 2017 | 46,000 | Good |
| I10 SR8 over Persimmon Hollow | 1968 | 43,000 | Fair |
| US98 SR30 over Williams Creek | 1955 | 41,500 | Fair |
| US90 SR10 over Jacobs Creek | 1958 | 35,500 | Fair |
All bridges nearby: Santa Rosa County, FL bridge conditions · every bridge in Santa Rosa County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.