Final answer:
An exact date for when Van De Walle and Associates prepared their project on the Old Minnehaha County Jail is not available without consulting historical records or direct inquiry. Architectural projects undergo multiple stages, thus 'preparation' could mean different phases of the project's completion.
Step-by-step explanation:
The project on the Old Minnehaha County Jail by Van De Walle and Associates of San Francisco (SF) signifies a specific architectural or restoration endeavor. To accurately identify when Van De Walle and Associates prepared their project on the Old Minnehaha County Jail, it is necessary to consult historical records, project documentation, or news articles that may discuss the project's timeline. This information is not commonly available in widely accessible databases and might be found in local archives, the company's records, or through direct inquiry with the firm or the county historical society. Without specific dates or additional context, providing an exact answer is not feasible. It is essential to understand that architectural projects like these often span several stages including planning, design, approval, and construction, which might span multiple years. Therefore, the 'preparation' phase could refer to any of these stages depending on the project's complexity and the scope of work undertaken by Van De Walle and Associates.