About the Project: Special Featured Rock Entrance Walls with Stone Paving. Rock Retaining Walls, and Special Coloured Concrete Sleeper Retaining Walls in various stages of the Estate. The Rock is Coldstream Brown Walling Rock. Share this:Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)