Natural Resources Wales criticised over Llanrwst flood work
The main environment body in Wales has been blamed for allowing part of a stream to be destroyed during work to prevent flooding in Conwy county.
The £711,000 project in Llanrwst also took place in the fish spawning season when thousands of eggs are laid.
One senior assembly member called it an "abdication" by Natural Resources Wales (NRW) of its responsibility.
NRW said it took a "pragmatic view" in an "exceptional case" where a delay could have threatened the project.