E1580 Royal Oaks over I-35 Under
Garvin County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- E1580 Royal Oaks over I-35 Under in Garvin County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 1,750 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 165 of the 330 inventoried bridges in Garvin County rated fair (50.0%); 38 (11.5%) 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 January 2023, on a 24-month routine inspection cycle.
- 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 → (34.72465, -97.25433)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 275 ft |
| Location | 5.0 Mi N. S.H. 29 |
| NBI structure number | 179300000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Garvin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-35 over Creek | 1969 | 36,000 | Good |
| I-35 over Washita River | 2016 | 32,900 | Good |
| I-35 over Creek | 1967 | 31,000 | Fair |
| I-35 over Creek | 1968 | 30,600 | Fair |
| I-35 over Rush Creek | 1969 | 17,250 | Fair |
| I-35 over S.H. 19 Under | 1970 | 17,250 | Good |
All bridges nearby: Garvin County, OK bridge conditions · every bridge in Garvin County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.