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About SPU
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Drainage & Sewer System
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Natural Drainage Systems
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Natural Drainage Overview
Technical Resources
Seattle Public Utilities offers an array of technical resources for other municipalities that have an interest in implementing natural drainage systems (NDS). Learn more about:
Measuring the Success of Natural Drainage Systems
The NDS program monitors water quality and surface runoff volumes at some NDS sites.
Cost Analysis (PDF)
A cost comparison of SPU’s natural drainage system program and traditional street and drainage improvements.
Plant Palette, 2000-2006 (PDF)
Compilation of planting lists from SEA Streets and Broadview Green Grid.
Bioretention Specification (PDF)
Construction and soil mix requirements for bioretention facilities. Updated April 2009.
High Point Landscape Maintenance Guidelines (PDF)
Written to guide maintenance professionals at High Point, this manual is a good example of a landscape maintenance plan for any project. It has many practical methods and resources for landscapers and project managers.
Seattle Natural Drainage Systems Program Presentation (PDF)
Overview of NDS presented at the Second National Low Impact Development Conference.
Stormwater Design Seminars
2006 professional seminars highlighting design and construction lessons learned from NDS and Low Impact Development projects around the Northwest.
Practically Easy Landscape Manual: A Care Manual for Natural Drainage Systems, Fall 2006 Edition (PDF)
This manual outlines the responsibilities of the City and of residents in maintaining natural drainage systems. It also includes helpful tips for major landscape maintenance tasks needed to establish and nurture NDS plantings, or to maintain any residential yard.
Plant Identification (PDF) - Provides color photos, special needs, and environmental requirements of NDS plants.
Learn more about Project specific technical resources:
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