Specifications include, but are not limited to: Design, furnish, install, test, operate, monitor, and maintain dewatering system of sufficient scope, size, and capacity to control hydrostatic pressures and to lower, control, remove, and dispose of ground water and permit excavation and construction to proceed on dry, stable subgrades. A. Install dewatering system utilizing wells, well points, or similar methods complete with pump equipment, standby power and pumps, filter material gradation, valves, appurtenances, water disposal, and surface-water controls. 1. Space well points or wells at intervals required to provide sufficient dewatering. 2. Use filters or other means to prevent pumping of fine sands or silts from the subsurface. B. Place dewatering system into operation to lower water to specified levels before excavating below ground-water level. C. Provide standby equipment on-site, installed and available for immediate operation, to maintain dewatering on continuous basis if any part of system becomes inadequate or fails.