N1684 over Red River
Harmon County, Oklahoma · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N1684 over Red River in Harmon County, Oklahoma, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2013, making it 12 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 80 of the 106 inventoried bridges in Harmon County rated good (75.5%); 1 (0.9%) 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 → (34.58016, -99.95846)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 1,453 ft |
| Location | Okla-texas State Line |
| NBI structure number | 304050000000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Harmon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. 62 over Creek | 1927 | 2,300 | Good |
| U.S. 62 over East Fork Sandy Creek | 1931 | 1,800 | Fair |
| U.S. 62 over Creek | 1931 | 1,700 | Good |
| U.S. 62 over Creek | 1931 | 1,700 | Good |
| U.S. 62 over Creek | 1931 | 1,700 | Good |
| U.S. 62 over Creek | 1932 | 1,600 | Good |
All bridges nearby: Harmon County, OK bridge conditions · every bridge in Harmon County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.