21st Street SW over Square Butte Creek
Good Condition42 years old200 vehicles/day
Location
| State | North Dakota |
| County | Oliver |
| Location | 1 West Of Hannover |
| Carries | 21st Street SW |
| Crosses | Square Butte Creek |
| Coordinates | 47.11131, -101.43946 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Single/Spread |
| Total Length | 51.8 ft (15.8 m) |
| Max Span | 46.9 ft (14.3 m) |
| Deck Width | 30.5 ft (9.3 m) |
| Deck Area | 146.9 sq m |
| Main Spans | 1 |
| Year Built | 1984 |
Traffic
| Avg Daily Traffic | 200 (2018) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 724 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000033116130 |