Colonel Quinn, the first Duluth District Engineer, assumed temporary responsibility at St. Paul in 1906. He supervised completion of the controversial Twin City lock and dam 2. St. Paul interests believed the dam threatened that city’s position as head of Mississippi River navigation. The dam was also a deterrent to the flow of logs below St. Anthony Falls. Ironically, within 10 years, the Corps inundated this structure with the reservoir formed by lock and dam 1 at the Ford Bridge.