77 1/2 Ave. over Heart River
Fair Condition68 years old50 vehicles/day
Location
| State | North Dakota |
| County | Grant |
| Location | 18 North 11 West Of Elgin |
| Carries | 77 1/2 Ave. |
| Crosses | Heart River |
| Coordinates | 46.65812, -102.07985 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 8 (Very Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 175.9 ft (53.6 m) |
| Max Span | 57.1 ft (17.4 m) |
| Deck Width | 27.6 ft (8.4 m) |
| Deck Area | 450.2 sq m |
| Main Spans | 3 |
| Year Built | 1958 |
Traffic
| Avg Daily Traffic | 50 (2022) |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000019101050 |