An area of woodland within the Porter Valley parks. It forms part of the sequence of linked parks leading from near the city centre out to the edge of the Peak District. The dam was used as a boating lake but the water level is now too low. Prior to its use as a park, the Porter Brook powered several industrial sites along it's course. The 'boating lake' is the old mill dam of Whiteley Wood forge. The earliest reference to the forge is in 1779. Several other elements of the old mill and forge survive also including a wheel pit, tail goit and some buildings. Legibility is significant.