S 200 over Drainage
Dawson County, Montana · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S 200 over Drainage in Dawson County, Montana, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1959, making it 66 years old at the 2025 inventory.
- It carries about 307 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 9 of the 109 inventoried bridges in Dawson County rated poor (8.3%); 9 (8.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now poor (superstructure 5 to 4).
- Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (47.56156, -105.24961)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 5 | 4 | Poor condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 57 ft |
| Location | 10M SW Richey |
| NBI structure number | P00051017+01831 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Dawson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| S 200s-towne St over Yellowstone River | 1958 | 8,821 | Fair |
| I 94 over Bad Route Creek | 1973 | 4,438 | Fair |
| I 94 over Cracker Box Creek | 1973 | 4,317 | Fair |
| I 94 over Clear Creek | 1973 | 4,317 | Poor |
| I 94 over Whoopup Creek | 1976 | 4,221 | Fair |
| I 94 over Sand Creek | 1976 | 4,221 | Fair |
All bridges nearby: Dawson County, MT bridge conditions · every bridge in Dawson County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.