Us016a over Grace Coolidge Ck
Fair Condition99 years old1,562 vehicles/day
Location
| State | South Dakota |
| County | Custer |
| Location | 1.1 W Jct Sd 36 |
| Carries | Us016a |
| Crosses | Grace Coolidge Ck |
| Coordinates | 43.76546, -103.35190 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 7 (Good) |
| Culvert | 5 (Fair) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 35.1 ft (10.7 m) |
| Max Span | 30.8 ft (9.4 m) |
| Deck Area | 65.3 sq m |
| Main Spans | 1 |
| Year Built | 1927 |
Traffic
| Avg Daily Traffic | 1,562 (2024) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is eligible for the National Register |
| Structure Number | 000000017354071 |