N4135 over Hickory Creek
Nowata County, Oklahoma · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N4135 over Hickory Creek in Nowata County, Oklahoma, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1930, making it 95 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 14 of the 126 inventoried bridges in Nowata County rated poor (11.1%); 14 (11.1%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2024, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (36.89057, -95.63714)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel through truss |
| Length | about 164 ft |
| Location | 2.5 Mi N of Lenapah |
| NBI structure number | 032010000000000 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Nowata County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. 169 over Creek | 1937 | 6,800 | Fair |
| U.S. 169 over Double Creek | 2002 | 5,800 | Good |
| U.S. 169 over Vineger Creek | 1962 | 5,700 | Fair |
| U.S. 169 over Opossum Creek | 2018 | 5,700 | Good |
| U.S. 169 over Opossum Creek Overflow | 2018 | 5,700 | Good |
| U.S. 169 over Double Creek | 2002 | 5,600 | Good |
All bridges nearby: Nowata County, OK bridge conditions · every bridge in Nowata County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.