Stormwater management (SWM) structures are designed to collect and attenuate rainfall in order to separate pollutants that are collected as rain passes over impervious surfaces and to reduce the velocity of collected runoff to protect receiving streams from erosion. The City of Rockville began its stormwater management program for new development in 1978. Today, the City requires all new development to meet State of Maryland guidelines for water quality and quantity treatment. The City's Stormwater Management law (Chapter 19 of the City Code) and the Department of Public Works Stormwater Management Regulations describe the requirements for new development, which is administered through the City's development review and permitting process. To address deficiences in stormwater management and stream protection caused by previous development, the City conducts periodic watershed management plans. The purpose of these plans is to develop a comprehensive watershed rehabilitation and protection plan, coming up with a list of priority projects for each watershed which then get incorporated into the City's Capital Improvements Program (CIP) for implementation. | 
