Posted on 10 May 20154 June 2016 by David Pendeford Mill Open Day, May 2015, Vole central Series of round holes in the bank of the River Penk opposite the reserve, just the right size to form a retreat for some water voles. Post navigationPrevious post: Pendeford Mill Open Day, May 2015, Heron’s nestNext post: Pendeford Mill Open Day, May 2015, Bluebells