The 5' high x 50' long backup AquaDam® is pulled up the ramp and onto the parking lot (which has a slight grade to it) allowing all of the water to drain out.   

The end of the 8' high x 250' long AquaDam® is lifted off of the berm by the yacht lift. This causes more water to drain out of the open end. The water did not run out while it was a cofferdam because both ends were extended up the bank higher than the water inside.

The yacht lift pulls the rolled-up end of the AquaDam® out from between the piers and sets it at the end of the gangway. The boat can still be used to pull the AquaDam® further out and away from the boat ramp.  

The boat needs to pull all of the slack out and line the AquaDam® up straight with the boat ramp. There is still over 150,000 gallons of water inside the AquaDam®. These water molecules are easy to maneuver because they are buoyant.