Surface Water Management (Title 13) | Environment & Sustainability
runoff generated by site development. A water quality facility uses processes that include but are not limited to settling, filtration, adsorption, and absorption to decrease pollutant concentrations and loadings in stormwater runoff.
development charge shall have a notation on their plats stating that the property may be subject to a lien for the final costs of any necessary off-site surface water drainage improvements.
C. Surface Water Development Charge
D. Surface Water Runoff Regulations
1. City Authorized to Collect Charge
1. Purpose
The City is authorized to collect a surface water system development charge, effective January 1, 2019, as follows:
The purpose of this chapter is to promote the public health, safety and welfare by providing for the comprehensive management of surface and stormwaters and erosion control, especially that which preserves and utilizes the many values of the City’s natural drainage system including open space, fish and wildlife habitat, recreation, and education. By conducting programs to reduce flooding, erosion, and sedimentation; prevent and mitigate habitat loss; enhance groundwater recharge; and prevent water quality degradation through the implementation of comprehensive and thorough permit review, construction inspection, enforcement, and maintenance, the effectiveness of the requirements contained in this chapter will be promoted.
SURFACE WATER DEVELOPMENT CHARGE Development Type Fee
New residential dwelling unit or commercial building with up to 2,500 square feet of impervious coverage Each additional 250 square feet of impervious coverage over 2,500 square feet Other structures or additions of up to 250 square feet of impervious coverage requiring a building permit
$2,085.00
$208.50
$208.50, plus $208.50 for each additional 250 square feet
All impervious surface areas shall be rounded to the nearest 250-square-foot increment. The fee shall not apply to rockeries or retaining walls.
2. Drainage review – When required – Type
a. Drainage review is required when any proposed project is subject to a City of Sammamish development permit or approval and: i. Would result in 2,000 square feet or more of new impervious surface, replaced impervious surface or new plus replaced impervious surface; or
2. Charges Shall Be Liens
All charges made under this section shall constitute a lien upon the property from which such charges are due, superior to all other liens and encumbrances whatsoever, except for general taxes and local special assessments. Enforcement of such lien shall be in the manner provided by law. All properties assessed a surface water system
Effective | January 1, 2022 Revisions | June 29, 2022
Title 21: Sammamish Development Code | 143
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