This publication provides introductory technical guidance for civil engineers, geotechnical engineers, and other professional engineers and construction managers interested in dewatering systems typically associated with construction of foundations for buildings and other infrastructure. Here is what is discussed: 1. ANALYSIS OF GROUNDWATER FLOW, 2. MATHEMATICAL AND MODEL ANALYSES, 3. FLOW NET ANALYSES, 4. ELECTRICAL ANALOGY SEEPAGE MODELS, 5. NUMERICAL ANALYSES, 6. WELLPOINTS, WELLS, AND FILTERS, 7. PUMPS, HEADERS, AND DISCHARGE PIPES, 8. FACTORS OF SAFETY, 9. DEWATERING OPEN EXCAVATIONS, 10. DEWATERING SHAFTS AND TUNNELS, 11. PERMANENT PRESSURE RELIEF SYSTEMS, 12. FREEZING, 13. CONTROL OF SURFACE WATER.