Co. Rd. N3370 over S.H. 7 Spur Under
Murray County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Co. Rd. N3370 over S.H. 7 Spur Under in Murray County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1991, making it 34 years old at the 2025 inventory.
- It carries about 160 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 66 of the 128 inventoried bridges in Murray County rated fair (51.6%); 2 (1.6%) 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 March 2024, 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 → (34.52491, -97.00148)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 270 ft |
| Location | 1.4 Mi NE of SH 7 |
| NBI structure number | 229210000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2024 |
| 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 Murray County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-35 over Creek | 1969 | 25,600 | Fair |
| I-35 over Lick Branch Creek | 1969 | 25,600 | Fair |
| I-35 NB over U.S. 77 Under | 1969 | 15,800 | Fair |
| I-35 NB over Wild Horse Creek Oflow | 1969 | 15,800 | Fair |
| I-35 NB over Wild Horse Creek | 1969 | 15,800 | Fair |
| I-35 NB over S.H. 77D Under | 1969 | 15,600 | Fair |
All bridges nearby: Murray County, OK bridge conditions · every bridge in Murray County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.