N1820 over Sulphur Creek
Good Condition35 years old60 vehicles/day
Location
| State | Oklahoma |
| County | Harmon |
| Location | 1.2 N 7.3 E Of Vinson |
| Carries | N1820 |
| Crosses | Sulphur Creek |
| Coordinates | 34.91767, -99.73105 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 55.1 ft (16.8 m) |
| Max Span | 53.1 ft (16.2 m) |
| Deck Width | 28.2 ft (8.6 m) |
| Deck Area | 144.5 sq m |
| Main Spans | 1 |
| Year Built | 1991 |
Traffic
| Avg Daily Traffic | 60 (2022) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 224 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 227800000000000 |