River Mole River Mole The River Mole is a tributary of the River Thames in southern England. It rises in West Sussex near Horsham and flows northwest through Surrey for to the Thames at East Molesey, opposite Hampton Court Palace. The river gives its name to the Surrey district of Mole Valley. The Mole crosses the North Downs between Dorking and Leatherhead, where it cuts a steep-sided valley, known as the Mole Gap, through the chalk. Much of the catchment area lies on impermeable rock (including Wealden Clay and London Clay), meaning that the river level responds rapidly to heavy rainfall. During
Mole (architecture) the years resulted in the former dyke disappearing under several metres of accumulated silt and soil upon which the Ottomans built a town from 1517 onwards. Part of the modern city of Alexandria is now built on the site. When England acquired the north African city of Tangier as English Tangier in 1661, the English began building a mole to improve the harbour. The mole was planned to be long and cost £340,000, and the improved harbour was to be long, deep at low tide, and capable of keeping out the roughest of seas. Work began on the mole in