S 21-s Main ST over Pondera Coulee
Good Condition92 years old1,245 vehicles/day
Location
| State | Montana |
| County | Pondera |
| Location | Conrad By Fleet Supply |
| Carries | S 21-s Main ST |
| Crosses | Pondera Coulee |
| Coordinates | 48.16372, -111.95012 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 7 (Good) |
| Culvert | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Culvert |
| Total Length | 37.7 ft (11.5 m) |
| Max Span | 15.4 ft (4.7 m) |
| Deck Area | 147.2 sq m |
| Main Spans | 2 |
| Year Built | 1934 (reconstructed 1989) |
Traffic
| Avg Daily Traffic | 1,245 (2023) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 225 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | P00021003+08001 |