Upload
sweet-water
View
215
Download
0
Embed Size (px)
Citation preview
MMSD’s Regional Green Infrastructure Plan and The Role of Permeable Pavement
May 1, 2014
Karen Sands, AICP
Manager of Sustainability
Milwaukee Metropolitan Sewerage District
Milwaukee Metropolitan Sewerage District
We Serve: • 1.1 Million Customers
• 28 Municipalities
• 411 Square Miles
We Protect the Public & Lake Michigan:
• Convey/Store/Reclaim Wastewater
• Manage Flooding
We Do This With Infrastructure:
• Grey
• Green
5/13/2014
Green Infrastructure
• Complements Traditional Grey Infrastructure
• Uses Vegetation and Soil/Foundation to Manage Water Where it Falls
• Provides a Host of Benefits that Pipes Can’t
Porous Pavement’s Benefits
• Reduces Polluted Stormwater Runoff
• Recharges Groundwater
• Reduces Urban Heat Island Effect
• Melts Snow/Ice
Porous Pavement Is…
• Green Infrastructure
• Not Green, per se, but Acts Green: – Infiltrates – Stores – ≠ Evapotranspires
• Types: – Concrete – Asphalt – Concrete or Plastic Stones/Pavers,
Grids, and Geocells
Green Infrastructure In MMSD’s Discharge Permit
4.10 Wet Weather Management-Green Infrastructure
“…The practices/control measures put in place in 2013 must cumulatively have a design retention capacity of at least 1
million gallons, and each following calendar year during the permit term an additional 1 million gallons of green
infrastructure retention capacity must be put in place...”
5/13/2014
MMSD 2035 Vision’s Green Infrastructure Goals
• Capture the 1st 0.5” of rainfall
• Capture & reuse the 1st 0.25 gallon per SF
5/13/2014
Regional Green Infrastructure Plan
Porous Pavement Goes Where?
Primarily….
• Public/Private Streets
• Parking Lots
Recommendations by Green Infrastructure Strategy
740 MG =
How Big is That?
1,190 acres (900 football fields)
How Much is That?
155,400,000 gallons (2,800,000+ rain barrels)
How Much Will That Cost?
Cost Type Cost/Gallon Cost/Gallon Managed
Incremental $ 6.60 $ 1.65
Full $10.00 $ 2.50
• Total Incremental Cost of Porous: $364M
• $0.10/SF Managed Annually
Regional GI Plan Recommends Combinations
Regional GI Plan Recommendations
• Develop Regional Maintenance Standards
• Address Equipment/Training Needs
• Support Demonstration Projects
• Develop Parking Lot Retrofit Screening Program
Karen Sands, AICP Milwaukee Metropolitan Sewerage District
[email protected] 414-225-2123
www.mmsd.com www.h2ocapture.com