A new fish ladder under construction in Bowmanville Creek, Ontario, is going to mean volunteers get a good night's sleep for the first time in years.  Upriver from the creek are spawning grounds for salmon, but a barrier dam in the creek meant they could not swim upstream to their destination.  The absence of a suitable fish ladder at the obstacle meant that during the migration season, teams of volunteers spent several nights herding the fish into nylon bags and manually lifted them over the obstacle. There was a bypass on the dam designed for trout, but after the government introduced salmon into the waters, the existing fish route proved unsuitable for the larger fish and so volunteers working with the Valleys 2000 project began their human powered fish lift system.  Although the project was supposed to start last year, problems with the design meant they needed to spend extra time and money with the engineers perfecting the design.  The design is still not 100% effective, and some fish may be too tired to make the journey, but it is still a vast improvement on the previous bag and lift system. The Bowmanville fish ladder has been designed to keep out pests of the salmon, such as lamprey and goby, and it is hoped that once the construction is finished, most of the 10,000 fish that were manually lifted last year will be able to swim up themselves, and return to spawning grounds devoid of predators in order to mate and restock the rivers and the Valleys 2000 volunteers will be able to sleep easy.