Knoxville, Tennessee is located in the foothills of the Smoky Mountains, along the Tennessee River, and is home to the University of Tennessee. Knoxville Utilities Board (KUB) is the water provider in the City of Knoxville and surrounding areas. The KUB water service area comprises approximately 120,000 acres, with the topography of the service area including several ridges and significant rolling terrain. Providing water to this service area presents unique challenges, and careful consideration needs to be given in the planning and design of the water transmission infrastructure. KUB obtains its water supply from a single intake on Fort Loudoun Lake, a reservoir on the upper Tennessee River. Water is treated at the Mark B. Whitaker Water Treatment Plant (MBW WTP), which has a rated capacity of 62 million gallons per day (mgd). The MBW WTP is a conventional filtration plant that was originally constructed in 1927 and has undergone numerous upgrades to replace aging equipment, improve treatment performance, comply with regulatory requirements, increase capacity, improve reliability, and protect the facilities from damage. Between 2013 and 2015, KUB started development of a Water Supply Master Plan (WSMP) to address reliability concerns related to the MBW WTP. Several alternatives were considered in the development of the WSMP, including a new, second water treatment plant, purchase of water from neighboring utilities, and provision of a redundant intake, treatment train, and high service pumping capability at the MBW WTP. The latter option was selected for phased implementation with the objective of creating two separate treatment trains capable of providing 38 mgd, the projected average daily demand for the WSMP planning period. A total of 10 projects with a projected construction cost of over $100 million were identified to increase redundancy and resiliency of the MBW WTP. Of these original projects, 3 have been completed, 1 is currently under construction, and the remaining projects are anticipated to be completed within 8 years. This presentation will focus on the initial risk evaluation process, the development of the original plan, as well as subsequent updates to the plan. Attendees will gain an understanding of the questions to consider and how to implement an effective planning approach to mitigate water supply risks.