Over the last several years, the New Mexico Bureau of Geology and Mineral Resources (NMBGMR), Aquifer Mapping Program, has been working on numerous research aspects of the geology and hydrology of the San Agustin Plains, New Mexico. This White Paper, Open-File Report 615, provides a detailed overview and summary of the results from this work, and will be followed by a comprehensive, peer-reviewed report on these results, with data, in the coming months.