S Archer Rd over Big Muddy Creek 016
Sheridan County, Montana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S Archer Rd over Big Muddy Creek 016 in Sheridan County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2004, making it 21 years old at the 2025 inventory.
- It carries about 17 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 11 of the 66 inventoried bridges in Sheridan County rated good (16.7%); 3 (4.5%) 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 January 2024, on a 24-month routine inspection cycle.
- 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 → (48.78582, -104.8094)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 139 ft |
| Location | 7M SE Redstone |
| NBI structure number | L46425000+05001 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Sheridan County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| S 5 over Marron Creek | 1983 | 1,559 | Fair |
| S 16 over Ator Creek | 1984 | 1,559 | Fair |
| S 5 over Antelope Creek | 1986 | 1,120 | Good |
| S 16 over Medicine Lake | 1975 | 891 | Fair |
| S 5 over Plentywood Creek | 2001 | 589 | Good |
| S 5 over Mccoy Creek | 2001 | 589 | Good |
All bridges nearby: Sheridan County, MT bridge conditions · every bridge in Sheridan County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.