N3010 over Cottonwood Creek
Grant County, Oklahoma · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N3010 over Cottonwood Creek in Grant County, Oklahoma, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1990, making it 35 years old at the 2025 inventory.
- It carries about 24 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 31 of the 477 inventoried bridges in Grant County rated poor (6.5%); 31 (6.5%) 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 May 2024, on a 12-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (36.70658, -97.64232)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 3 | 3 | Serious condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 37 ft |
| Location | .3n2.8w1n2w.1sof Lamont |
| NBI structure number | 224690000000000 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oklahoma department of transportation.
Busiest bridges in Grant County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. 60/U.S. 64&81 over Creek | 1967 | 3,200 | Fair |
| U.S. 60/U.S. 64&81 over Nine Mile Creek | 1967 | 3,200 | Fair |
| U.S. 60/U.S. 64&81 over Wild Horse Creek | 1967 | 3,200 | Fair |
| U.S. 60/U.S. 64&81 over Creek | 1969 | 3,200 | Good |
| U.S. 60 / U.S. 81 over Killpecker Creek | 2003 | 2,300 | Good |
| U.S. 81 over Killpecker Creek | 2014 | 2,000 | Good |
All bridges nearby: Grant County, OK bridge conditions · every bridge in Grant County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.