A steep inclined plane that forms one part of the extensive incline route within the Glyn Rhonwy slate mining complex (NPRN 400675). It is orientated north-east/south-west and measures up to 218m long. The site is marked on both the OS 1st Edition and current mapping. West end is SH5614860457. East end is SH5635460521. P.J. Schofield, OANorth, 27th June 2007