Prepared by the Urban Drainage Standards Committee of the Standards Development Council of the Environmental and Water Resources Institute of the American Society of Civil Engineers Standards ANSI/ASCE/EWRI 62-16, 63-16, and 64-16 establish guidelines for the design, installation, and operation and maintenance of stormwater impoundments. Gathered into a single volume, these new standards focus on local and regional impoundments that manage, treat, and attenuate stormwater runoff, thus reducing the impact of stormwater on downstream areas. ANSI/ASCE/EWRI 62-16 provides guidance for design and covers such topics as types of systems, regulations and permits, design requirements, safety, inflow hydrology, hydraulic design, routing, and water quality. ANSI/ASCE/EWRI 63-16 presents guidelines for the installation and discusses subjects such as contract documents, site investigation, installation, and inspection. ANSI/ASCE/EWRI 64-16 focuses on operation and maintenance of stormwater impoundments, including O&M plans, water quality, periodic inspection, and maintenance. Standard Guidelines for the Design, Installation, and Operation and Maintenance of Stormwater Impoundments is the most up-to-date reference on the impoundment and naturally occurring treatment of stormwater. The three standards are useful in applications such as airports, roads, and other transportation systems, as well as industrial, residential, and recreational areas. Incidental surface water is considered, but the standards do not address broader issues associated with larger-scale flood control impoundments and reservoirs, which have unique and multipurpose aspects.

Engineers, planners, and owners considering stormwater impoundment solutions will find these new standards to be a valuable resource.