This report represents the third in a publication series which summarizes the results of a multiphase cultural resource management program in Cochiti Reservoir, New Mexico. The present phase of the research concerns a program for mitigation for those archeological sites which will be directly impacted by the floodwaters between 5322 and 5400 foot elevations retained in Cochiti Reservoir. During the course of the mitigation program, twenty sites that span late Archaic (En Medio phase), Anasazi(Pueblo III, Pueblo IV), and Historic (Spanish Colonial, Territorial) periods have been investigated. The site reports and appendices to this volume provide descriptive summaries of the results of the mitigation program at the intrasite level of analysis.