Late C19 and part of the Rhondda Fach Water Scheme (nprn 309952) by the Pontypridd Water Works Co. Originally constructed of dressed stone, comprising the dam with parapet and roadway, and spillway on the N side, but substantially altered and rebuilt in concrete in the mid C20.
Recorded as part of Uplands Initiative Survey. R Hayman, H&H, 29/09/2009.