ABSTRACT
This chapter discusses some of the more general ways in which common units of impact measure may be developed and applied to stormwater system development charges (SDCs). It describes a stormwater collection system is installed to serve a region composed of one major drainage basin. The chapter examines the calculation of fees in lieu of construction of stormwater storage facilities to accommodate specific developments. A primary consideration of stormwater analysis is amount and change in impervious surfaces. Stormwater facility planning also includes identification of system alternatives considering: land use patterns; storage, channeling and treatment options; risks to life, property, and convenience; and costs of installation, operation and maintenance. Sometimes, stormwater facilities are financed from general obligation bonds. Stormwater SDCs are used to help finance the particular stormwater system resulting from the planning process. One of the basic questions involved in calculating stormwater SDC is the unit of development impact on which to measure the impact of any particular development.
