The Tumulus Disposal Demonstration (Tumulus 1), Tumulus 2, and the Interim Waste Management Facility (IWMF) are being utilized to demonstrate the acceptability of tumulus disposal technology while at the same time providing disposal capacity for solid low-level radioactive waste (LLW) generated at Oak Ridge National Laboratory (ORNL). The planning process resulting in selection and ultimate implementation of tumulus disposal technology for the Oak Ridge Reservation is still on-going and consists of four major phases: alternatives identification and evaluation; technology demonstration; limited operational implementation; and full operational implementation at a new site. This document discusses these phases. 2 figs., 1 tab