US 18 over Stockpass
Niobrara County, Wyoming · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 18 over Stockpass in Niobrara County, Wyoming, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 2,406 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 12 of the 34 inventoried bridges in Niobrara County rated good (35.3%); 1 (2.9%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (42.76414, -104.60205)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Steel culvert |
| Length | about 29 ft |
| Location | Orin Jct-Lusk |
| NBI structure number | HTF |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wyoming department of transportation.
Busiest bridges in Niobrara County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 18 over Niobrara River | 1988 | 2,942 | Fair |
| US 85 over UPRR | 2016 | 2,942 | Good |
| US 18 over Old Woman Creek | 1971 | 2,150 | Fair |
| US 18 over Old Woman Creek | 1987 | 2,150 | Fair |
| US 18 over Mule Creek | 1988 | 2,150 | Fair |
| US 85 over Cheyenne River | 1990 | 1,084 | Fair |
All bridges nearby: Niobrara County, WY bridge conditions · every bridge in Niobrara County · Wyoming bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.