The Killeen City Council will discuss some changes to its water supply and water managing systems during a council workshop meeting Tuesday. The council will go over the topics during a workshop meeting following a special council meeting at 5 p.m. Tuesday at City Hall in the Council Chambers. One of the topics is a bid with Landmark Structures, a general contractor in Fort Worth, to construct an elevated storage tank to accommodate water from the new $60 million Stillhouse Water Treatment Plant that opened last month after being in the works for years. It will cost the city $5,253,000 to build the tank with Landmark.