Stae Highway 1806 over Oahe Dam Spillway
Poor Condition63 years old123 vehicles/day
Location
| State | South Dakota |
| County | Stanley |
| Location | 5 Miles No. Of Ft. Pierre |
| Carries | Stae Highway 1806 |
| Crosses | Oahe Dam Spillway |
| Coordinates | 44.44667, -100.45000 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Girder and Floorbeam |
| Total Length | 460.0 ft (140.2 m) |
| Max Span | 58.1 ft (17.7 m) |
| Deck Width | 38.1 ft (11.6 m) |
| Deck Area | 1626.3 sq m |
| Main Spans | 8 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 123 (2016) |
| Truck Traffic | 17% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 923 |
| Inspection Frequency | Every 24 months |
| Owner | Corps of Engineers |
| Historical Significance | Historical significance is not determined |
| Structure Number | 59-360-228 |