This publication provides introductory technical guidance for civil engineers, geotechnical engineers and other professional engineers and construction managers interested in the design and construction of foundations and abutments for rock and earth fill dams. Here is what is discussed: 1. GENERAL, 2. CLEARING, GRUBBING, STRIPPING, AND CLEANING, 3. SEEPAGE CONTROL, 4. TREATMENT OF UNFAVORABLE CONDITIONS, 5. DEWATERING AND DRAINAGE OF EXCAVATED AREAS.