Scottsdale Stormwater Management Regulation

Stormwater storage facilities shall be constructed to store runoff from at least a 100-year, 2-hour storm event. The Design Standards and Policies Manual (DSPM) is the document detailing the city’s specific requirements to address drainage, flooding and stormwater quality, including procedures, policies, forms, document standards, design standards and construction standards to help administer this chapter, among other purposes. In lieu of stormwater storage, the Floodplain Administrator may allow alternative stormwater management measures, including, but not limited to, pervious pavement, vegetative roofs, stormwater harvesting, LEED design strategies, and other low impact development options to manage stormwater.

If the stormwater storage requirement is fully or partially waived, a contribution to the cost of stormwater management (in-lieu fee) shall be required as shown on the fee schedule. The developer may apply this standard to any property. Instead of requiring construction of stormwater management facilities, the city may accept a payment in lieu of construction when the city determines such action is appropriate, based on certain considerations. The city may also accept off-stie stormwater management facilities instead of requiring on -site construction if deemed appropriate. A payback agreement with the city is available for non-residential, multi-family and mixed-use developments, and developments subject to a land division, if the stormwater management facilities subject to the payback agreement provide a public stormwater management benefit.