The 29 high lift locks of the Upper Grand Division of the Lehigh Canal operated unlike any other locks in the world. Designed by Edwin A. Douglas in the 1830s, they raised and lowered wooden canal boats from 10 feet to as much as 30 feet by admitting water to lift boats to the upstream level, then releasing water to lower them to the downstream level. Josiah White, the canal's co-founder and creative managerial leader, wrote that one 30-foot-lift lock filled or emptied in less than three minutes and that engineers had objected to the plan until he turned to E.A. Douglas and employed him at once. Along 26 miles, the canal's locks overcame a 600-foot drop in elevation, while 20 dams maintained the water supply and created slackwater for navigation. This section had slightly over 5 1/2 miles of dug canal, 60 feet wide at the top, 40 feet wide at the bottom, and five feet deep. The Lehigh Canal between Mauch Chunk, present-day Jim Thorpe, and White Haven became known as the Upper Grand Section, while the canal from Mauch Chunk to Easton was the Lower Section. In early June 1862, 30 hours of heavy rainfall sent hundreds of thousands of cut logs into the river, and the raging logs battered and destroyed the locks and dams of the Upper Division. A newly constructed rail line then replaced the damaged canal, and ruins along the Lehigh River channel remain from that vanished way of life.