Lil Porcupine CR R over Little Porcupine CR 014

Rosebud County, Montana · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• Lil Porcupine CR R over Little Porcupine CR 014 in Rosebud County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
• It was built in 1978, making it 47 years old at the 2025 inventory.
• It carries about 190 vehicles a day (traffic count year 2023).
• Its listed owner is the county highway agency.
• It is one of 87 of the 112 inventoried bridges in Rosebud County rated fair (77.7%); 7 (6.2%) are rated poor.
• 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 → (46.41532, -106.63423)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.

Busiest bridges in Rosebud County

All bridges nearby: Rosebud County, MT bridge conditions · every bridge in Rosebud County · Montana bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.