Bobtail Road over Bobtail Creek
Gilpin County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Bobtail Road over Bobtail Creek in Gilpin County, Colorado, 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 1999, making it 26 years old at the 2025 inventory.
- It carries about 698 vehicles a day (traffic count year 2020).
- Its listed owner is a city or municipal highway agency.
- It is one of 16 of the 18 inventoried bridges in Gilpin County rated fair (88.9%); 0 (0.0%) 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 → (39.79828, -105.48935)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel through arch |
| Length | about 124 ft |
| Location | S of Mardi Gras Casino |
| NBI structure number | BLKHWK-BOBTAIL |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Gilpin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 119_Main St. S. over North Clear Creek | 2013 | 14,000 | Good |
| SH 119 Ml over Cottonwood Creek | 1939 | 9,400 | Fair |
| SH 119 Ml over Smith Hill Creek | 1939 | 9,400 | Fair |
| Gregory Street over Gregory Gulch | 1933 | 3,289 | Fair |
| SH 119 Ml over UP RR | 1989 | 3,100 | Fair |
| SH 119 Ml over South Boulder Creek | 1989 | 3,100 | Fair |
All bridges nearby: Gilpin County, CO bridge conditions · every bridge in Gilpin County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.