Environment & Sustainability | Surface Water Management (Title 13)
15. Developed parcel. Any parcel of real property altered from the natural state by the construction, creation or addition of impervious surfaces.
22. Effective impervious surface. Those impervious surfaces that are connected via sheet flow or discrete conveyance to a drainage system. Impervious surfaces are considered ineffective if: 1. the runoff is fully dispersed as described in Appendix C of the Surface Water Design Manual; 2. residential roof runoff is infiltrated in accordance with the full infiltration BMP described in the Surface Water Design Manual; or 3. approved continuous runoff modeling methods indicate that the entire runoff file is infiltrated. 23. Equivalent service unit (ESU). A configuration of impervious surface estimated to contribute an amount of runoff to the City’s stormwater management system which is approximately equal to that created by the average single- family residential developed parcel in the City. 24. Erosion and sediment control. Any temporary or permanent measures taken to reduce erosion, control siltation and sedimentation and ensure that sediment-laden water does not leave the site or enter into wetlands or aquatic areas. 25. Farm management plan. A comprehensive site-specific plan developed by the farm owner in cooperation with the King Conservation District taking into consideration the land owners’ objectives while protecting water quality and related natural resources. 26. Financial guarantee. A form of financial security posted to do one or more of the following: ensure timely and proper completion of improvements; ensure compliance with the Sammamish Municipal Code; or provide secured warranty of materials, workmanship of improvements and design. “Financial guarantees” include assignments of funds, cash deposit, surety bonds or other forms of financial security
Director. The director of the City of Sammamish department of public works, other department directors specified in enforcement procedures established in accordance with the Sammamish Municipal Code, or any designee of those directors.
16.
17. Division. The department of public works, engineering division, or its successor agency. 18. Discharge. Runoff, excluding off-site flows, leaving the proposed development through overland flow, built conveyance systems, or infiltration facilities. 19. Drainage. The collection, conveyance, containment or discharge, or any combination thereof, of surface and stormwater runoff. 20. Drainage facility. A constructed or engineered stream, lake, wetland, or closed depression, or a pipe, channel, ditch, gutter, flow control facility, flow control best management practice, water quality facility, erosion and sediment control facility, and any other structure and appurtenance that provide for drainage. 21. Drainage review. An evaluation by City staff of a proposed project’s compliance with the drainage requirements in the Surface Water Design Manual. The types of drainage review include: simplified drainage review, targeted drainage review, directed drainage review, full drainage review and large project drainage review.
Revisions | June 29, 2022 Effective | January 1, 2022
134 | Title 21: Sammamish Development Code
Made with FlippingBook Ebook Creator