Us016a over Grace Coolidge Ck
Fair Condition49 years old1,562 vehicles/day
Location
| State | South Dakota |
| County | Custer |
| Location | 4.4 E Jct Sd 87 N |
| Carries | Us016a |
| Crosses | Grace Coolidge Ck |
| Coordinates | 43.77192, -103.39497 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Concrete |
| Design | Slab |
| Total Length | 38.4 ft (11.7 m) |
| Max Span | 34.1 ft (10.4 m) |
| Deck Width | 36.4 ft (11.1 m) |
| Deck Area | 129.9 sq m |
| Main Spans | 1 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 1,562 (2024) |
| Truck Traffic | 3% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000017332066 |