The homes, in Conwy Terrace Llanrwst, were affected by floodwaters on Boxing Day after what are now known to be the worst floods to hit the Conwy Valley in thirty years.
Our report concludes that the £7 million Conwy Valley flood scheme, completed in 2010, performed well and protected the vast majority of homes it was designed to protect.
Without the scheme up to 76 properties would have been at risk of suffering serious flooding as they did in 2004 and 2005.
However it also acknowledges that procedures and working practices could be improved, making 18 recommendations to reduce the risk of flooding to Conwy Terrace in future.
NRW officers are now discussing these with their partner organisations – The Met Office, Conwy County Borough Council, and the North and Mid Wales Trunk Road Agency.