A weir damming the unnamed stream which flows through Little Craig y Borion Wood. Built to provide a head of water for the leat (Built of concrete (?) about 0.5m high. Behind the weir is a pool about 10m x 4m on the E bank of which is an iron grille the outlet to the leat. 50m above O.D.
The leat or water course is at the base of a dug channel about 0.75m - 1m deep and continues form the weir in a ESE direction towards Colby Lodge garden. The water appears to flow in a pipe or lined trench which is provided with an inspection cover in the form of a stone slab every 30m of so. Water was observed to flow in the pipe despite the leaves blocking the outlet at the weir. The leat terminates at a brick built manhole with slab cover on the opposite side of the road to the walled garden. It is assumed that the water continues beneath the road to emerge eventually at the 'lion's head' outlet set in the outer wall of the walled garden on its W side. A cistern noted outside the garden may be integral with this supply. Overall the leat is about 400m long. 50m - 40m above O.D.

John Latham RCAHMW 9 January 2013