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Sustainable Site & Stormwater Design For
Waterworks Projects
2008 AWWA REGIONAL CONFERENCE
By Scott Radford – Landscape Architect - MWH
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Conservation Conservation
Open Drainage
Rain Gardens
Amended Soils
Rain Barrel
Lot Level Source Controls
LID Site LID Site Porous Porous
Pavement Pavement
Create a Hydrologically Create a Hydrologically Functional LotFunctional Lot
Narrower Streets
Site design that addresses user needs (of the present) while accommodating the needs of the natural environment.
What is Sustainable Civil Site Design
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Why is Sustainable Site Design Important?
•Regulatory Requirements•Meets LEED Requirements•Better Design
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Components of Site Design?
•Existing Conditions•Grading•Paving•Aesthetics•Drainage •Lighting•Landscaping
Don’t forget the Designers, Operators and Users…..
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Integrated Design & Collaboration LEEDs to Sustainable Site Design.
Multi Discipline Team Meetings and Workshops.•Engineers•Owner•Operators•Maintenance•Contractors•Stakeholders
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• Balance Cut and Fill• Preserve Existing Vegetation &
Topsoil• Sustainable Earthwork Techniques
(NPS)
Sustainable Grading & Earthwork
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Sustainable Paving
•Minimize Paving •Use Porous Paving•Slope Paving to Landscape Areas•Use Light Colored Paving•Narrower Roadways
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Sustainable Site Layout
• Preserves Natural Areas• Follow Natural Drainage
and Contours• Cluster Design• Improves Visual Acuity
and Aesthetics• Aids in Building Heating
& Cooling
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• A sustainable stormwater management technology that combines precision engineering with micro-scale controls that are engineered, designed and integrated into every site feature in order to maintain, restore or closely mimic pre-development watershed hydrologic functions (volume, recharge, evaporation and runoff).
DEFINITION:
THINK OUTSIDE THE PIPE!
Sustainable DrainageLow Impact Development (LID)
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Sustainable DrainageLow Impact Development (LID)
•Reduce Impervious Surfaces•Green Roof•Porous Paving
THINK OUTSIDE THE PIPE!
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Sustainable DrainageLow Impact Development (LID)
•Direct Run off into swales•Rain Gardens•Swales•Bio-infiltration
THINK OUTSIDE THE PIPE!
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Stormwater Management with Low Impact Development (LID)
THE NUMBER 1 BEST MANAGEMENT PRACTICE FOR IMPLEMENTING
LOW IMPACT DEVELOPMENT STORMWATER MANAGEMENT IS:
THINK OUTSIDE THE PIPE!
BUILD HEALTHY TOPSOIL
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Sustainable Site Design
DESIGN STRATEGIES
• Limited Clearing of site• Limited turf (35% of
conventional)• Limited irrigation• Limited impervious cover• Zero discharge of stormwater.• Capture roof runoff in cistern• Use of native plants
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LID is Sustainable Because It’s Natural and Cost EffectiveSEATTLE STREET ALTERNATIVES
Source: Seattle Public Utilities: Natural Drainage System
COST SAVINGS USING LID VS. CONVENTIONAL
$100,000 SAVINGS PER CITY BLOCK
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SUSTAINABLE SITES INITIATIVE
• SOILS• HYDROLOGY• VEGETATION• MATERIALS• HUMAN WELL-BEING
GENERAL GOALS AREAS
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SUMMARY
• KEY DESIGN CONSIDERATIONS FOR SUSTAINABLE SITE DESIGN:• SITE ANALYSIS• PRESERVE TOPSOIL & VEGETATION• MANAGE STORMWATER QUALITY & QUANTITY
WITH BY INTEGRATING THE LANDSCAPE DESIGN WITH THE STORMWATER DESIGN.
THINK OUTSIDE THE PIPE!
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Questions