Water supply and delivery system planning for the City of Boulder, Colorado, has always been an interesting and challenging process, not due to technical problems but because of the political process of reconciling competing interests in the water resources of the area. Historically, agricultural users were the biggest competitors for the water, and the impacts of mining on water quality were of considerable concern. Recently, new competition for water quantity based on environmental concerns has entered the picture in the form of minimum streamflows, channel maintenance flows, and preservation of threatened and endangered species. Since water supply is limited, this paper discusses the innovative methods that have been adopted to address this changing situation including: involving various stakeholders in the planning process; acknowledging uncertainty by establishing suitable water system performance goals in the form of reliability criteria; community and environmental goals; and establishing a more aggressive water conservation program.