ORC river works on Water of Leith February 11th, 2020 Kayakers are advised that flood protection works are underway on the Water of Leith from February to May 2014. Otago Regional Council (ORC) works are between the Dundas St Bridge and the Union St Bridge. Part of the works entails extensive work in the river channel and on the right bank of the river. The works would at times be a hazard for river users and kayakers. Warning signs have been placed upstream. Attached maps indicate warning sign placements.