LENINOGORSK

Kazak Leninogor, formerly (until 1941) Ridder city, northeastern Kazakstan. The city is situated in the southwestern Altai Mountains along the Ulba River, at an elevation of more than 3,300 feet (1,000 m). An Englishman, Philip Ridder, discovered a small mine containing gold, silver, copper, and lead there in 1786, and systematic mining started in 1791. Present-day Leninogorsk is an important centre of the lead and zinc industry and is connected to the Turk-Sib Railway. Pop. (1991 est.) 69,500.