N1670 over Sweetwater Creek
Roger Mills County, Oklahoma · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N1670 over Sweetwater Creek in Roger Mills County, Oklahoma, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1988, making it 37 years old at the 2025 inventory.
- It carries about 100 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 140 of the 151 inventoried bridges in Roger Mills County rated good (92.7%); 0 (0.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (35.44681, -99.99969)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 32 ft |
| Location | 5. W 1.7 N of Sweetwater |
| NBI structure number | 217940000000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Roger Mills County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| S.H. 152 over Sweetwater Creek | 2013 | 5,500 | Good |
| U.S. 283 over Creek | 1932 | 2,500 | Good |
| U.S. 283 over Sandstone Creek | 1977 | 2,500 | Fair |
| U.S. 283 over Currant Creek | 1998 | 2,500 | Good |
| U.S. 283 over Currant Creek | 1998 | 2,500 | Good |
| U.S. 283 over Washita River | 1979 | 2,400 | Good |
All bridges nearby: Roger Mills County, OK bridge conditions · every bridge in Roger Mills County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.