1881 just north of Crystal Lake, Illinois. Most of the workers at the tile and ceramic works factory came from Crystal Lake, The production consisted of drain tile, brick and architectural items. In 1886 the Gates Pottery was established as a subsidiary with William D. Gates, a Crystal Lake area native as its president. The company fabricated architectural glazed terra cotta that was used on buildings designed by architects Louis Sullivan and Frank Lloyd Wright in the style of the Prairie School. American Terra Cotta's company records show that architectural glazed terra cotta was used on many local buildings including Oak Manufacturing Company, Teckler Building, Cohn Store, Telephone Exchange and Commercial Building, El-Tovar Theatre, Crystal Lake High School and additions, Central School and additions, Pure Oil Research Lab and additions, Sinclair Refining Company Service Station, Warner Building, Citizens State Bank, Garbe Garage, Home State Bank, various Williams Street stores and bakeries, and Martinetti's Motel. Gates used the facilities to experiment with clays and glazes in an effort to design a line of art pottery which led to the introduction of Teco pottery (from TErra COtta, but pronounced locally as "Tea-co") in 1902. Many of the pottery pieces were designed by architects such as Frank Lloyd Wright Produced for only a few years, this pottery exemplifies the Arts and Crafts Movement and today is highly sought after by art collectors. Teco pottery is in the collection of many museums. Recent history On April 11, 1965, during the Palm Sunday tornado outbreak, a large and devastating tornado damaged or destroyed large portions of the city. Six people were killed by the tornado, and a further 75 wounded. Damages in the city totaled over $1.5 million, as 80 homes and a shopping center were completely destroyed. Disaster shelters were set up to house the homeless, and then-governor of Illinois, Otto Kerner, Jr., personally visited the city to view the damage. In the past 20 years, the history of Crystal Lake has consisted mainly of the growing of suburban subdivisions, as the population increased to 38,000 in the 2000 Census from 21,823 in the 1990 Census. In order to deal with the growth, Crystal Lake South High School was opened in 1978. Previously, Crystal Lake Community High School (now Crystal Lake Central High School) had served the entire city of Crystal Lake since 1924. Even more recently a third high school, Prairie Ridge High