ACCESS is a collaborative project among researchers at Michigan State University and the University of Colorado Boulder funded by the National Science Foundation. Led by Drs. Yadu Pokhrel and Lifeng Luo at MSU and Dr. Ben Livneh and Elizabeth Payton at CU, the project engages with Colorado River basin stakeholders to assess climate change impacts to streamflows in the basin and identify plausible alternatives to current management practices. Phase I of the project has had two components, a Western Water Assessment managed stakeholder engagement component and a Michigan State managed basin-modeling component. This poster describes the Phase I progress on both components.