A Blackhawk man died Tuesday after a construction accident in a Stanley County gravel pit. The Stanley County Sheriff’s Office was dispatched to the Briggs Gravel Pit west of Fort Pierre around 12:35 PM. Chief Deputy Greg Swanson says 62 year old Steven Pigsley became pinned between his truck and loading equipment at the gravel pit. Pigsley was pronounced dead at the scene. The Stanley County Sheriff’s Office investigated the accident. Swanson says the Occupational and Safety Health Administration or OSHA has been notified and will be doing its own investigation. Assisting at the scene were AMR Amublance, South Dakota Highway Patrol and the Stanley County Coroner’s Office.