Wyo 51 over Well Creek
Crook County, Wyoming · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Wyo 51 over Well Creek in Crook County, Wyoming, 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 1956, making it 69 years old at the 2025 inventory.
- It carries about 1,326 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 120 of the 176 inventoried bridges in Crook County rated fair (68.2%); 4 (2.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 7 to 6.
- Its most recent inspection on record is dated August 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (44.28516, -105.08145)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 90 ft |
| Location | Gillette - Moorcroft |
| NBI structure number | BGK |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 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 Wyoming department of transportation.
Busiest bridges in Crook County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 14 over S Fork Sundance Creek | 1954 | 3,482 | Fair |
| I-90 Wbl over Well Creek | 1969 | 3,214 | Fair |
| I-90 Wbl over Machinery Pass | 1969 | 3,214 | Fair |
| I-90 Ebl over Wyo 585 | 1972 | 2,981 | Good |
| I-90 Ebl over Machinery Pass | 1972 | 2,981 | Fair |
| I-90 Ebl over I-90 Bus. / US 14 | 1972 | 2,981 | Good |
All bridges nearby: Crook County, WY bridge conditions · every bridge in Crook County · Wyoming bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.