SH 9 Ml over S Fk South Platte Rvr
Park County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 9 Ml over S Fk South Platte Rvr in Park County, Colorado, 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 1978, making it 47 years old at the 2025 inventory.
- It carries about 2,200 vehicles a day (traffic count year 2018).
- Its listed owner is the state highway agency.
- It is one of 34 of the 55 inventoried bridges in Park County rated fair (61.8%); 3 (5.5%) 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 → (39.02427, -105.81402)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Steel culvert |
| Length | about 36 ft |
| Location | 0.15 Mi N of US24/HARTSL |
| NBI structure number | H-13-AA |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Park County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 285 Ml over Deer Creek | 1958 | 14,000 | Fair |
| US 285 Ml over Middle Fk So Platte Rvr | 2024 | 8,000 | Good |
| US 285 Ml over Trout Creek | 1937 | 7,200 | Fair |
| US 285 Ml over N. Fork S. Platte River | 1962 | 6,400 | Fair |
| US 285 Ml over Geneva Creek | 1989 | 6,400 | Fair |
| US 285 Ml over N Fk South Platte Rvr | 1989 | 5,900 | Fair |
All bridges nearby: Park County, CO bridge conditions · every bridge in Park County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.