How Can Green Infrastructure Pay for Itself?

1. PARTNERS FOR WHAT’S POSSIBLE
www.pennoni.com
GREEN INFRASTRUCTURE
Presented By:
Katherine E. Childers, PE
Project Manager
March 10, 2017

2. What Is Green Infrastructure (GI)?
 Definition
 A stormwater management
practice to:
 Intercept runoff at the source;
 Infiltrate a portion of it into the
ground;
 Evaporate a portion of it into the
air and in some cases;
 Reduce runoff through reuse; or
 Release a portion of it slowly
back into the sewer system.
 Result:
 Sustainable and resilient
infrastructure
 Generates economic benefits
 15-89% cost savings
(EPA Study)
Green Infrastructure Cycle
Source: Rutgers University Green Infrastructure Guidance Manual

3. What Is GI? (Continued)
 Public and Private Developments
 Triple Bottom Line Benefits
 Environmental
 Social
 Economic
Rain Garden
Tree Filter Box
Bioswale
Stormwater Planter
Source: Rutgers University Green Infrastructure Guidance Manual

4. Economic Benefits of GI
 Reduction in Combined-Sewer Overflows
 MS4 Compliance
 Reduction in Flooding
 25% of flood claims due to nuisance urban flooding (FEMA)
 1 impervious acre = 1 million gallons of runoff per year
 Average of 12.1% impervious surfaces in NJ
 1” rainfall results in 18.3 billion gallons of stormwater
Enough to fill up MetLife Stadium 38 times!
 Cost Savings of $150 Annually per Household
(2005 USDA Study)
 Conserve Energy
 13% of US Energy consumption is used to move, treat and transport water
 Property Value Impact
 10% increase in property values
 7% increase in commercial office rents
 5% increase in apartment rents
(Source: 2016 SBN & GSI Partners ESI Report)
Impervious Cover in New Jersey
Source: Rutgers University Green
Infrastructure Guidance Manual

5. The Navy Yard - Case Study
Central Green District
Source: The Navy Yard 2013 Master Plan Update
Green Street (Rouse Boulevard)
Rain Gardens

6. The Navy Yard - Case Study
(Continued)
Source: Halkin Mason Photography
Source: Halkin Mason Photography
Central Green
Bioretention Basin &
Porous Pavement

7. Hudson Tea Building E - Case Study
Source: DeWitt Tishman
Architects, LLP

8. Hudson Tea Building E - Case Study
(Continued)
Source: Filterra Bioretention
Systems
Rain Garden Under Construction
On-Site
 Green Roof
 Rain Garden
 Porous Pavers
Public ROW
 Tree Filter
Boxes (Filterra)
 Porous Pavers

9. Columbia Field - Case Study
Before After

10. Columbia Field - Case Study
(Continued)
Dual 4’ diameter
perforated HDPE
pipes in
6’ deep stone
infiltration beds
Subsurface
Infiltration
Basin

11. All American Assisted Living - Case Study
GI Practices
 Bio-Infiltration Basins
 Swales
 Amended Soils
 Vegetation
Source: EGA Architects

12. Green Infrastructure Websites
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h t t p : / / w w w. n j s t o r m w a t e r. o r g / t r e a t m e n t . h t m l
h t t p : / / w w w. n j f u t u r e . o r g / i s s u e s / e n v i r o n m e n t - a n d -
a g r i c u l t u r e / w a t e r - s e w e r / g r e e n - i n f r a s t r u c t u r e /
h t t p : / / n j a e s . r u t g e r s . e d u / p u b s / f s 1 1 9 7 / i n t r o - t o - g r e e n -
i n f r a s t r u c t u r e . a s p
h t t p : / / w w w. n j s t o r m w a t e r. o r g / b m p _ m a n u a l 2 . h t m
QUESTIONS?
Katherine E. Childers, PE
215-254-7784
kchilders@pennoni.com
Source: New Jersey Department of Environmental Protection