231 ST over Rock Ck
Fair Condition21 years old10 vehicles/day
Location
| State | South Dakota |
| County | Miner |
| Location | 2n & 6.6w Howard |
| Carries | 231 ST |
| Crosses | Rock Ck |
| Coordinates | 44.03755, -97.66290 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 9 (Excellent) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 60.4 ft (18.4 m) |
| Max Span | 56.4 ft (17.2 m) |
| Deck Width | 30.5 ft (9.3 m) |
| Deck Area | 171.1 sq m |
| Main Spans | 1 |
| Year Built | 2005 |
Traffic
| Avg Daily Traffic | 10 (2022) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000049094110 |