Us016a over Grace Coolidge Ck
Good Condition39 years old1,562 vehicles/day
Location
| State | South Dakota |
| County | Custer |
| Location | 5.7 E Jct Sd 87 N |
| Carries | Us016a |
| Crosses | Grace Coolidge Ck |
| Coordinates | 43.76384, -103.37908 |
Condition Ratings
| Overall Condition | Good |
| Channel/Waterway | 7 (Good) |
| Culvert | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Culvert |
| Total Length | 48.6 ft (14.8 m) |
| Max Span | 15.7 ft (4.8 m) |
| Deck Area | 90.3 sq m |
| Main Spans | 3 |
| Year Built | 1987 |
Traffic
| Avg Daily Traffic | 1,562 (2024) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2021 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000017340072 |