Un-vanishing a lake
From January 10, 2005 to October 22, 2006, or thereabouts, Ledia Carroll retraced the ghostly outline of a vanished freshwater lake in San Francisco as part of her Mission Lake Project.
From a press release, to be read in the past tense, unfortunately: “On October 22, 2006, Ledia Carroll will use a field line chalker to recreate the full perimeter of Lago Dolores, a former freshwater lake that stretched from what is now South Van Ness to Guerrero and 15th to 20th Streets. Drawing the line in reference to maps from the 1800s, Carroll’s chalkline allows the still visible ancient depression of the lake to become apparent to the eye. In conjunction with the re-created lake shoreline, Ledia Carroll presents a 'lakeside' barbeque and perimeter 'alleycat' bike race.”
There were also guided tours later in the year to some of San Francisco’s hidden underground waterways. And if someone could let us know where we might find more info on these hidden waterways online, that'd be fantastic.