I have had a quick look at the planning application and it seems Natural Resources Wales recommend a more detailed model on flood levels. The site is in a C1 flood risk zone and they haven't taken into consideration the flood risk from the original course of the Afon Ganol. NRW will have to be satisfied that the increase in density does not compromise the safety of future residents of the scheme and that the risks/consequences of flooding can be acceptably managed.
There is lots of interesting fact and a 3D sketches of how it will look. If anyone wants a look go to the Conwy County Borough Planning site click Viewing & Commenting on Planning Applications. then click Search by Application,In the application box put in 0/42592, click on the green writing Application No, click View Documents. This will bring you to all the info such as plans, input from various departments etc and letters of objection.
One thing I noticed on the application form in answer to the question, 'Is the site currently vacant' they replied No. Surely that can't be right as it's well over 10 years since anyone lived there. Also the number of car spaces is going up from 2 to 28, so that is probably one of the reasons they have cleared the garden.
It's a very sad time for all the Counties in Wales as the Welsh Ministers are pushing to build more much needed housing, but greedy developers are being opportunistic and using a loop hole this has caused to build in areas that normally it wouldn't be allowed, in the race to meet the targets WAG have set.