2007 Lane Cove Weir Fishway Improvement Project Heritage Impact Statement, NSW DPI and NSW NPWS. Lane Cove Weir in 2007, while options for fish l;adders were under consideration by the Department of Fisheries and the National Parks and Wildlife Service. EnvironmentalIndustrialLocalLandscapeSydney - NorthernHeritage Assessment Authors: Dr Sue Rosen and Dr Sid French Client: Metropolitan Northern Region of the National Parks and Wildlife Service This heritage Impact Statement assesses the impact of measures to stop leaking and the extension and improvement of the fishway.