At the north end of Kidwelly, it was the steep ordinary watercourse that runs north to south above Cae Ffynnon that bursts its banks with devastating impacts for residents downstream.
Ym mhen gogleddol Cydweli, y cwrs dŵr cyffredin serth sy'n rhedeg o'r gogledd i'r de uwchben Cae Ffynnon wnaeth orlifo ac roedd effaith hynny ar drigolion i lawr yr afon yn ofnadwy.