INTERA has been awarded a contract by NAGRA (the Swiss national agency for radioactive waste disposal) to develop a three-dimensional site scale model for a proposed waste repository in Switzerland. The three-dimensional modeling will simulate two-phase flow associated with the operational and post closure period of a low/intermediate-level and high-level radioactive waste repository. To complete this effort, INTERA will work with scientists at Lawrence Berkeley National Laboratory (LBNL) to develop two separate three-dimensional models that will be run with parallelized computer codes previously developed by LBNL.