Swamp Creek Rd over Big Timber Creek

Sweet Grass County, Montana · rated Good in the 2025 National Bridge Inventory

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

• Swamp Creek Rd over Big Timber Creek in Sweet Grass County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
• It was built in 2019, making it 6 years old at the 2025 inventory.
• It carries about 100 vehicles a day (traffic count year 2025).
• Its listed owner is the county highway agency.
• It is one of 30 of the 94 inventoried bridges in Sweet Grass County rated good (31.9%); 6 (6.4%) 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 December 2023, 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 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 → (45.88626, -109.95935)

Component ratings

Bridge details

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

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