6558: Cottonwood C over Nine Mile Creek
Carbon County, Utah · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 6558: Cottonwood C over Nine Mile Creek in Carbon County, Utah, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1994, making it 31 years old at the 2025 inventory.
- It carries about 75 vehicles a day (traffic count year 2023).
- It is one of 2 of the 72 inventoried bridges in Carbon County rated poor (2.8%); 2 (2.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated May 2023, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (39.78378, -110.15019)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 60 ft |
| Location | 37 mi NE of Price UT |
| NBI structure number | 000000000L59176 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Utah department of transportation.
Busiest bridges in Carbon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-6 (SR-6) over Price River | 1952 | 15,754 | Fair |
| US-6 (SR-6) over Consumers Wash | 1951 | 15,754 | Fair |
| US-6 (SR-6) over SR-55 | 1985 | 14,196 | Fair |
| SR-55 W.price Conn over Price River | 1977 | 14,181 | Good |
| US-6 (SR-6) over Carbon Canal | 1978 | 14,042 | Fair |
| US-6 (SR-6) over Gordon Creek | 1978 | 14,042 | Fair |
All bridges nearby: Carbon County, UT bridge conditions · every bridge in Carbon County · Utah bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.