Lake Tapps , near Seattle , was created by electricity company in 1911 . It's a huge lake that is fed from the Columbia River and has been used for hydroelectric power since 1912. Authorities recently drained lake to repair dam , revealing lake bed .
Lake Tapps , near Seattle , was created by electricity company in 1911 . Four-and-a-half square miles were submerged to power hydro-electric dam . Authorities recently drained lake to repair dam , revealing lake bed .