Monument Avenue over 18th St Canal
Gulf County, Florida · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Monument Avenue over 18th St Canal in Gulf County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1953, making it 72 years old at the 2025 inventory.
- It carries about 212 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 41 of the 62 inventoried bridges in Gulf County rated fair (66.1%); 8 (12.9%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated March 2024, on a 24-month routine inspection cycle.
- 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 → (29.79824, -85.29796)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Concrete slab |
| Length | about 76 ft |
| Location | 0.18 Mi South of 16th St |
| NBI structure number | 510019 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | March 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.
Busiest bridges in Gulf County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US98 SR30 over City Street | 1958 | 11,200 | Fair |
| US98 SR30 over Gulf County Canal | 1993 | 10,700 | Fair |
| US98 (SR30) over Ditch | 1953 | 9,000 | Fair |
| US98 SR30 over Chicken House Branch | 2006 | 8,900 | Fair |
| US98 SR30 over Chicken House Branch | 2006 | 8,900 | Good |
| US98 SR30 over St Joe Bay Inlet | 2021 | 8,800 | Good |
All bridges nearby: Gulf County, FL bridge conditions · every bridge in Gulf County · Florida bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.