Taking Construction to the Summit and Beyond Area Native, Adam Grabenstein, started a new role with Summit Contracting in February and he’s ready to tell Gothenburg all about its wonders. Originally a South Dakota based company, Summit Contracting expanded into Nebraska two years ago with a Lincoln, NE location. They are a general contracting company that focuses primarily ...PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today!