No.5 Dock HM Naval Base Portsmouth

Architected by the Navy Board. "The Great Stone Dock"; originally built in 1698, rebuilt in 1769 and presently known as "No. 5 Dock". No. I Basin. The docks are constructed of large blocks to tooled, coursed, squared, Portland stone with Roman numerals indicating water levels. They have stepped sides with flights of steps and haulage slides; Poor Condition Flooded due failure of gates; vulnerable to algal growth and saturation of stonework with risk of accelerated decay.