the concrete tower was built in 1950 as a relay between Plato Center to the west and downtown Chicago. In 1962 the steel tower was added on and the site got a route added to Eola. In 1972 the site became one of the 10 sites in Chicago that became cell sites for a bell lab field trial on advanced mobile phone systems (amps). The mobile phone building is at the base of the steel tower on the east side. Today the site is owned and operated by a local dispatch center and the cone antennas have all been removed. On the steel tower the waveguide and catwalk were removed.