Cardinal Hill Reservoir  Cardinal Hill Reservoir is a historic site in Jefferson County, Kentucky. It is listed on the National Register of Historic Places. It was designed by Chicago architect Victor Andre Matteson. A one-story structure of stone (ashler), it includes Doric pilasters, full entablature, parapet wall, shouldered architraves, quoins, and balustraded stairs. Lights along front bank of old reservoir set on pedestal bases "with tomb-like structures" holding lights at corners.