U.S. 56 over BNSF R.R. Under
Cimarron County, Oklahoma · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- U.S. 56 over BNSF R.R. Under in Cimarron County, Oklahoma, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1988, making it 37 years old at the 2025 inventory.
- It carries about 4,600 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 41 of the 90 inventoried bridges in Cimarron County rated fair (45.6%); 1 (1.1%) 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 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 → (36.7272, -102.48787)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 229 ft |
| Location | 0.2 Mi. W. Jct. US287 |
| NBI structure number | 220680000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 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 Cimarron County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. 56 over Creek | 1936 | 5,900 | Good |
| U.S. 56 over Drainage Canal Boisecity | 1951 | 4,000 | Fair |
| U.S. 287 over Adobe Draw | 2010 | 3,257 | Good |
| U.S. 287 over Cimarron Valley RR Under | 2011 | 2,700 | Fair |
| U.S. 287 over Creek | 1935 | 2,300 | Good |
| U.S. 287 over Creek | 1935 | 2,200 | Fair |
All bridges nearby: Cimarron County, OK bridge conditions · every bridge in Cimarron County · Oklahoma bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.