Jersey Water Works Green Infrastructure Training at NJ Society of Municipal Engineers 9/14/16 Quarterly Meeting

JerseyWaterWorks
Green Infrastructure
Training
NewJerseySocietyofMunicipalEngineers
September 14, 2016
Jennifer Gonzalez,City of Hoboken
Green Infrastructure Subcommittee Co-Chair

Panel
• Jeremiah Bergstrom, Rutgers University
• Russ Dudley,TetraTech
• Rodman Ritchie,AKRF
• Jennifer Gonzalez, City of Hoboken
• Kandyce Perry, New Jersey Future
• LouiseWilson, New Jersey Future

3:30 PM Adjourn
Agenda
Part 1
1:00 PM Welcome
1:10 PM What is green infrastructure and why does it matter?
1:40 PM Green vs. Grey: Case Study Discussion
2:35 PM Green Infrastructure Survey
Part 2
2:55 PM The Path Forward:Tools and Options forTowns
3:10 PM Lessons from Hoboken
3:25 PM Raffle
2:45 PM Break

Best
Practices
Green
Infrastructure
Municipal
Outreach
Finance
Community
Engagement
Committees
CSO
Network

GICommittee Purpose
The Green Infrastructure subcommittee
works to promote and advance construction
of green infrastructure projects in CSO
communities and across the state.

Work Plan Action Items Volunteers
Action 1: Sustainable Jersey Actions Chris Obropta, Jen Gonzalez, Maureen
Krudner, Jennifer Duckworth, MariaWatt
Action 2: Green Infrastructure in Parks DanVan Abs, Chris Sturm
Action 3: Green Infrastructure
Monitoring Database
NickTufaro, Heather Fenyck, Maria Watt
Action 4: Green Streets Rob Pirani, Jen Gonzalez, Jennifer
Duckworth, Maureen Krudner, David
Antonio
Action 5: Green Infrastructure in
Construction/Development
Kandyce Perry, LouiseWilson
Action 6: Citizen’s Handbook for Green
Infrastructure
AshwaniVasishth ,TimVan Epp
Why are we here?

Become a member today!
www.jerseywaterworks.org

Sign up for
theJersey
WaterWorks
Newsletter!

Part I
TheWhat,Where,
Why and How of

Introduction to Green Infrastructure
www.water.rutgers.edu
Jeremiah Bergstrom, LLA, ASLA
jbergstrom@envsci.rutgers.edu
Christopher C. Obropta, Ph.D., P.E.
obropta@envsci.rutgers.edu
September 14, 2016

Water Resources Program
NJDEP Definition
"Green Infrastructure" means methods of
stormwater management that reduce wet
weather/stormwater volume, flow, or changes the
characteristics of the flow into combined or
separate sanitary or storm sewers, or surface
waters, by allowing the stormwater to infiltrate, to
be treated by vegetation or by soils; or to be stored
for reuse. Green infrastructure includes, but is not
limited to, pervious paving, bioretention basins,
vegetated swales, and cisterns.

US EPA Definition
Green infrastructure is a cost-effective, resilient
approach to managing wet weather impacts that
provides many community benefits. While single-
purpose gray stormwater infrastructure—
conventional piped drainage and water treatment
systems—is designed to move urban stormwater
away from the built environment, green
infrastructure reduces and treats stormwater at its
source while delivering environmental, social, and
economic benefits.

What is Green Infrastructure?
…an approach to stormwater
management that is cost-
effective, sustainable, and
environmentally friendly
Green Infrastructure projects:
• capture
• filter
• absorb
• reuse
stormwater to help restore the
natural water cycle.

How does Green Infrastructure work?
practices use soil and
vegetation to recycle
stormwater runoff
through infiltration and
evapotranspiration.

A Brief History of Stormwater Management

1st Attempt at Stormwater Management
Capture all runoff, pipe it, and send it directly to the river . . .prior to mid 1970’s

2nd Iteration of Stormwater Management
Capture runoff, detain it, release it slowly to the river…mid 1970’s to 2004
− Detain peak flow during large storm events for 18 hours (residential) or
36 hours (commercial)
− Reduce downstream flooding during major storms
− Use concrete low flow channels to minimize erosion, reduce standing
water, quickly discharge low flows
− Does not manage runoff from smaller storms allowing stormwater to
pass through the system
− Directly discharges stormwater runoff to nearby stream, waterway, or
municipal storm sewer system (at a controlled/managed rate)

3rd Generation of Stormwater Management
• Reduce stormwater runoff
volume
• Reduce peak flows and
flooding
…and….
• Maintain infiltration and
groundwater recharge
• Reduce pollution discharged
to local waterways
abc Action News, August 27, 2012

2004 NJ Stormwater Regulations
Municipal “Phase II”
NJPDES Stormwater
Permitting Rules (N.J.A.C. 7:14a)
Stormwater Management
Rules (N.J.A.C. 7:8)
• Municipalities and large public
complexes must obtain NJPDES
permits for their storm sewer system
• Permittees must develop,
implement, and enforce a
stormwater program that protects
water quality
• Permittees must prepare and
implement a Stormwater Pollution
Prevention Plan (SPPP):
• Municipal stormwater
management plan
• stormwater control ordinance
• public education program
• Sets forth stormwater management
goals for new development:
• Reduce flood damage
• Reduce soil erosion
• Protect public safety through
proper design and operation of
stormwater management
basins
• Minimize increases in peak
runoff
• Maintain groundwater recharge
• Protect water quality
• Sets forth the required components
of regional and municipal
stormwater management plans

Current Stormwater Management Approach
• Use nonstructural
management strategies
• Protect communities
from increases in
stormwater volume and
peak flows as a result of
new development
• Maintain groundwater
recharge
• Protect waterways from
pollution carried in
stormwater runoff
NJ.com, August 28, 2011

2015 CSO Individual Permits
• Under this permit action, the permittee will be required to evaluate a
broader range of control alternatives… The control alternatives shall
include: green infrastructure, increased storage in the collection
system, STP expansion/storage, I/I reduction, sewer separation,
discharge treatment and bypass of secondary treatment at the STP.
• The permit requires the permittee to consider at least the following:
Green infrastructure which allows for stormwater management close
to its source, providing both water quality treatment and some
volume control. The volume that is retained onsite and kept out of
the sewer system can help delay expensive gray infrastructure
maintenance and upgrades. Some examples of green infrastructure
measures include, but are not limited to, pervious pavements, street
bump-outs, rain gardens, and tree trenches.

Why Green infrastructure?
• Remediates flooding
• Improve water quality
• Reduces combined sewer
overflows
• Cost-effective
• Small-scale systems that
capture runoff near its source
• Mimic and help restore the
natural hydrologic cycle
• Enhances aesthetics
• Cleans the air
• Reduces heat island effect

GREEN INFRASTRUCTURE
TECHNOLOGIES

Green Infrastructure Systems:
• Vegetative Systems
• Bioretention Systems/Rain Gardens
• Stormwater Planters
• Harvesting Systems
• Cistern/Rain Barrel
• Downspout Planter Boxes
• Storage Systems
• Street Trees/Stormwater Tree Pits
• Pervious Pavement

Difference between the types of systems:
• Vegetative Systems: focus on reducing water quality impacts. These systems
are typically located close to the sources of runoff and can manage the smaller
storms of several inches. The main treatment mechanisms are infiltration,
filtration, and evapotranspiration.
• Harvesting Systems: focus on the conservation, capture, storage, and reuse of
rainwater. These systems are located close to residential and commercial
buildings.
• Storage Systems: provide storage of stormwater, quantity control, and infiltrate
stormwater runoff. These systems are typically located close to runoff sources
within residential, commercial, and industrial landscapes. The main treatment
mechanism is reducing peak flows of stormwater by storing it before it enters
the sewer system.

Bioretention Systems/Rain Gardens
Vegetative System
Landscaped, shallow depression that captures, filters,
and infiltrates stormwater runoff.

Bioretention Systems / Rain Gardens
How it works:
These systems capture, filter, and infiltrate stormwater runoff using soils
and plant material. They are designed to capture the first few inches of
rainfall from rooftops, parking areas, and streets.
Benefits:
Removes nonpoint source pollutants from stormwater runoff while
recharging groundwater
Restore/“mimic” predevelopment site hydrology
• Infiltration
• Evapotranspiration
Improve water quality
• Sedimentation, filtration, & plant uptake
• Microbial Activity
Add aesthetic value
• Plant selection
Vegetative System

Bioretention System/Rain Garden

Bioretention Systems / Rain Gardens
Vegetative System

Vegetative System
Rain garden at Catto School in Camden, NJ

Vegetative System
Rain garden installation at Ferry Avenue Library in Camden, NJ

Stormwater Planters
Vegetative System
Vegetated structures that are built into the sidewalk to
intercept stormwater runoff from the roadway or
sidewalk.

Stormwater Planters
How it works:
• It is a structural bioretention system that is installed in a
sidewalk
• Contains a layer of stone that is topped with bioretention
media and plants or trees
• Captures stormwater runoff from the roadway and sidewalk
• Once the system fills up, runoff flows back into the street or
into an overflow drain which connects to the sewer system
Benefits:
• Allows water to infiltrate into the ground
Vegetative System

Stormwater Planter

Stormwater Planters
Vegetative System
Typically, 4 feet wide
by 20 feet long

Vegetative System
Stormwater Planter at the Brimm School in Camden, NJ

Vegetative System
Stormwater Planters at Community Garden in Camden, NJ

Cisterns/ Rain Barrels
Vegetative System
These systems capture rainwater, mainly from rooftops,
in cisterns or rain barrels. The water can then be used
for water garden, washing vehicles, or for other non-
potable uses.

Cistern/ Rain Barrel
How it works:
• Capture, diversion, and storage of rainwater
Benefits:
• Eliminates need for complex and costly
distribution systems
• Provides additional water source
• Landscape irrigation
• Reduces flow to stormwater drains
• Reduces non-point source pollution
• Delays expansion of existing water treatment
plants
• Reduces consumers’ utility bills
Harvesting System

Rainwater Harvesting

Cistern at the Neighborhood Center in Camden, NJ
Harvesting System

Cistern at St. Bartholomew’s Church in Camden, NJ
Harvesting System

Harvesting System
Cistern at Front Street Community Garden in Camden, NJ

Downspout Planters
Harvesting System
Wooden or concrete boxes with plants installed at the
base of the downspout that provide an opportunity to
beneficially reuse rooftop runoff.

Downspout Planter: Harvesting System
How it works:
• Constructed boxes placed against buildings
• Contains stone/gravel topped with sandy compost
mixture and plants
• Designed with underdrain and overflows
• Disconnects downspouts
Benefits:
• Aesthetics
• Provide some rainfall storage
Harvesting System

Downspout Planter

Design Parameters for Downspout Planters:
• Planter box must be adequately reinforced to
hold soil, stone, and plants
• Limited capacity for stormwater retention –
mostly infiltration
• Soil infiltration rate is 5.0 inches per hour
• Underdrains are installed to drain the water
after the storm event

Downspout Planter: Harvesting System
Harvesting System

Downspout Planter Boxes at Acelero Learning Center in
Camden, NJ
Harvesting System

Downspout Planter Boxes at Davis School in Camden, NJ
Harvesting System

Stormwater Tree Pits/Street Trees
Storage System
Pre-manufactured concrete boxes or enhanced tree
pits that contain a special soil mix and are planted with
a tree or shrub. They filter stormwater runoff and
provide limited storage capacity.

How it works:
• Pervious concrete is installed to act as an additional storage
system to increase the stormwater capacity treated by the
system.
• Systems with low infiltration rates due to soil composition
are often designed with an underdrain system to discharge
the water.
• This system is often designed with conventional asphalt in
areas of high traffic to prevent any damage to the system.
Benefits:
• Improved aesthetics
• Healthier trees
• Reduced heat island effect
Storage System

Stormwater Tree Pit/Street Trees

Storage System

Pervious Pavements
Storage System
These surfaces include pervious concrete, porous asphalt,
interlocking concrete pavers, and grid pavers. These materials
allow water to quickly pass through the material into an
underlying layered system of stone that holds the water, allowing
it to infiltrate into the underlying uncompacted soil.

Pervious Pavement
How it works:
• Underlying stone reservoir
• Porous asphalt and pervious concrete are manufactured without
"fine" materials to allow infiltration
• Grass pavers are concrete interlocking blocks with open areas
• Ideal application for porous pavement is to treat a low traffic or
overflow parking area
Benefits:
• Manage stormwater runoff, minimize site disturbance, promote
groundwater recharge
• Low life cycle costs, alternative to costly traditional stormwater
management methods
• Contaminant removal as water moves through layers of system
• Allows runoff to flow through the surface to an underlying storage
layer
Storage System

Pervious Pavement
Storage System

Storage System
Porous Pavement (Asphalt) at Yorkship School in
Camden, NJ

Storage System
Porous Pavement (Concrete) at Wiggins School in
Camden, NJ

Green Infrastructure Manual for New Jersey
http://water.rutgers.edu/GreenInfrastructureGuidanceManual.html

QUESTIONS?
Jeremiah Bergstrom, LLA, ASLA
jbergstrom@envsci.rutgers.edu
Christopher C. Obropta, Ph.D., P.E.
obropta@envsci.rutgers.edu
www.water.rutgers.edu

Implementation

• A green and complete street is
designed to mange a street’s
stormwater runoff by using green
infrastructure, and provide safe
and accessible routes for all
users.
Photo: Portland, OR. Credit: Kevin Robert Perry

49%
29%
17%
5%
Land Area by Use in New
York City
Building &
Parking Lots
Streets
Parks &
Open Space
Vacant Land
16%
17%
58%
6% 3%
Land Area by Use for a
Residential Development
in Olympia, WA
Roof
Street
Lawn
Parking/
Driveways
Sidewalk
All Transportation Surface = 26%
(Impervious Surface Reduction Study. Olympia, WA, 1995)(PlaNYC Sustainable Stormwater Management Plan, 2008)

Typical suburban
street
 Convey stormwater into
buried conveyance
systems
 Capture surface runoff
into a landscaped area.
Complete and green
suburban street
Maplewood, MN (EPA)“Anywhere, USA” (EPA)

73
• Bioretention
• Bioswales
• Permeable Pavements
• Tree Boxes

74
• Reduction of stormwater
• Enhanced safety
• Improved water quality
• Reduce heat island effect
• Community livability
• Catalyst for redevelopment

75
• New streets!
• Look for opportunities
Curb lane
Tree
Planting
Excess Width

Current Complete Green Streets
Image : Nebraska Avenue, Washington, DC. Credit: DDOT

Image : San Francisco, CA. Credit: EPA

Image : Kansas City, MO. Credit: BNIM Architects

Portland, OR (EPA)
Washington, DC (EPA)
Portland, OR (Kevin Robert Perry)

Credit: Philadelphia Water Department

83
• Bioretention/Rain Gardens
• Permeable Pavement
• Cisterns
• Infiltration Basins
• Wetlands
• Green Roofs
• Urban Agriculture

85
Image: Constructed Wetland
Credit: NJDEP
Image: Submerged Gravel Wetland
Credit: University of New Hampshire

86
Credit: Wetland Studies and Solutions, Inc.

87
Image: Rooftop Farm at Brooklyn Navy Yard
Credit: Brooklyn Grange

89
• Reduction of stormwater
• Improved water quality
• Reduce heat island effect
• Community livability
• Catalyst for redevelopment

Regional Project Screening and Prioritization:
Overview

• Ownership = Public
• Distance to Storm Drain
less than 500 ft
• Some portion of the site
has slope < 10 percent
• Not located in river bed
and in conveyance
channels
SMonaBlvd
E 120th St
MonaBlvd
Los Angeles River Watershed
Potential Centralized BMPs
Mona Park
NAD_1983_StatePlane_California_V_FIPS_0405_Feet
Map produced 05-19-2011 - E. Moreno
Legend
Roads
Stormwater Main
Path for IngressEgress
Area of Geotechnical Investigation
0 120 24060
Feet
Flow
Direction±
GlenAvenue
DrainSystem

• Green infrastructure on
public parcels
• Green infrastructure on
private residential
parcels
• Green infrastructure
resulting from
redevelopment

94
GREEN STREET
LID AND
REGIONAL
NONSTRUCTURAL
Street-Scale Green Street
Opportunity and Drainage
Area Data

• General Maintenance:
– Pruning
– Mulching
– Irrigating
97

• Intermediate Maintenance:
– Remove clogging layer & top 3 inches of media to
increase surface ponding volume
98

• Permeable Pavement Maintenance:
– Street Sweeping
– Weed removal
99

GREEN STORMWATER INFRASTRUCTURE (GSI)
CASE STUDIES
Rod Ritchie, AKRF September 14, 2016

Aramingo Business Improvement District
 The BID is a business association/shopping district
 Economic Development & Job Creation
 Sanitation and Security Services
 BID covers an
area of roughly 70
acres
 Highly impervious
 Highly constrained
 Unmanaged
stormwater
 Unwelcoming
environment

Developed Stormwater Mitigation Scenarios
 GSI Master Planning Project
 Identified opportunities and constraints through desktop
assessment and field inspections
 Interactive Design Sessions to evaluate and rank
alternatives
• Regional GSI systems
• 2 Public ROW Scenarios
• Smaller GSI systems on private property

Cost for Public GSI
 Developed cost estimates for design scenarios
 Scenario 1 - public only $7.71 per sf
 Scenario 1 – public & private $7.62 per sf
 Scenario 2 – public only $$5.62 per sf
 Scenario 2 – public & private $5.16 per sf

American Street GSI Planning Study
 14-Block Underdeveloped industrial corridor
 Extended Study Area
 Proposing GSI to stimulate transformation
 Over-widened right-of-way and underdeveloped area
creates opportunity

Design Approach
 Manage 1” of public and private runoff
 Multi-objective
 Maintain multiple uses – pedestrian, truck traffic, bicycles,
public space
 Preserve industrial character
 Enhance economic development potential
 Maintain
community
connections –
schools, green
space, trails
 Design low
maintenance
systems
 Enhance safety

Opportunities and Constraints
 Industrial – Commercial
 Vacant – Small
residential pockets
 Pedestrian – Institutional
– Residential
 Property value gradient

American Street Design
 Developed typical layouts and
renderings
 Curbside bioretention areas
 Curbless design to allow direct
sheet flow
 Modular low-maintenance
forebays
 Slow-release irrigation trenches
 Access ports for private customers

Major Strategies for Wider Study Area
 Vacant Lots
 Development/Redevelopment Partnerships
 School/Park Retrofits
 Sidewalk Bioretention

American Street Summary
 Corridor only
 55 greened acres
 $300 - $400k per
greened acre
 Total Cost is $16.5 –
22M
 Vacant Lots
 43 Greened Acres
 $100 - $300k per
greened acre
 Total Cost is $4.3 –
12.9M
 Schools and Parks
 $100 - $300k per greened
acre
 Total Cost is $3.6 – 10.8M
 Sidewalk Bioretention
 $300 - $400k per greened
acre
 Total Cost is $21 – 28M

Private Property Scenarios
 Looked at 4 individual properties

ShopRite
 5 acre site
 97% Impervious
 Existing Charges
are $2,000 per
month

ShopRite GSI Concept
 Could manage 4.2 acres of IA
 Project cost is $460,000 ($110k/acre or $2.51/sf)
 SMIP Grant would cover $420,000
 Cost to ShopRite is $40,000
 Annual savings is $17,000
 Break even is roughly 2 years
 Could combine GSI with re-paving project to reduce
project cost

Summary
 GSI Improvements will provide city-wide benefits and
benefits to local property owners
 Stormwater charge reductions for business owners
 Will attract more visitors to the corridor
 Could explore public/private partnerships to reduce
implementation costs
 Recommend developing public/private cost sharing
policy
 Cost share
 Long-term O&M
 Financing options

Newman Paper Company – Philadelphia, PA

 40-acre paper
recycling facility
located on the North
Delaware Riverfront
 Uses large quantities
of potable water in
paper making process
 72.7 million gallons per
year
 Total PWD Charges
 $824,400 for water,
sewer and stormwater

 Achieve reductions
in both stormwater
and potable water
charges
 Collect water from
265,000 sf (6.08
acres) of roof area
into holding tanks
 Capture of 4.8
million gallons per
year or
approximately 7%
of process use
 Process is a volume
reducing practice due to
evaporative losses
 Captured stormwater
consumed by process
within 72 hours

Newman Paper – Summary
 Project cost = $500,000
($1.68/square foot)
 Total stormwater credits
= $26,500/year
 Potable water charge
savings = $15,600/year
 SMIP grant of $370,000
($1.39/square foot)
 Newman contribution of
$130,000 ($0.49/square
foot)
 Cash flow break even
period of less than 5
years

Text
‘njfuture’
to 55498
Green Infrastructure Survey
for Developers and Design Professionals
https://goo.gl/forms/97jD0KoalJbfVyKW2

Part II
What can
municipalities do to
make green
infrastructure
happen?

The Path Forward:
Tools and Options for
Towns

Mainstreaming Green Infrastructure
in Your Town
Options and Tools:
 Municipal Plans
 Ordinances
 Incentives
 Processes

Plans
• Green Infrastructure Plan
– Includes projects that can
become a mitigation plan.
• Master Plan
– Guiding Principles
– Conservation element
– Circulation element
– Land Use element
• Stormwater Plan
• Capital Plan (roads, parks,
muni facilities/DPW, schools)
• Large-scale Land Use
Plans
– Redevelopment Plans
– Affordable Housing Plan

Planning Principles
• Protect Natural
Resources
– Trees
– Open Space
– Stream corridors
• Promote Compact
Development and Infill
• Complete Streets /
Green Streets
• Efficient Parking
• Green Infrastructure
Stormwater Provisions

Ordinances
Stormwater Ordinance
 Require volume
retention for 1.25”, 2-
hour design storm
 Allow waivers only if
mitigation requirements
are met (you need a
mitigation plan w/
specific projects or a
“fee in lieu”)
 Emphasize the “green”
in GI. Go for benefits
beyond holding volume
– e.g., street trees and
pocket parks for
economic and public
health benefits.

Ordinances
Land Use
Ordinance
Curbing
Parking
Streetscape
Incentives –
e.g., FAR,
impervious
cover reduction

Incentives
• Signal: This is what we
want.
• Expedited review
• Credits for Certain GI
Practices
– Green Roofs
– Pervious Pavements
– Trees
– “Disconnected”
Impervious
• Other Incentives
– Increased FAR

Walk the Talk: Processes
• Encourage sketch
plan and early meeting
– informal
• Offer green review,
with clear guidance
and support
• Provide information
about options,
practices, greatest
impact.
• Checklists for all.
Minimize guesswork.

Walk the Talk:
Education and Training
• Public Works – key
players
• Planning Board, EC,
ZBA
• All municipal and
public projects
maximize GI (schools,
parks, streets, etc.)
• Staff training
• Municipal
maintenance practices

Walk the Talk: Municipal Projects
• Capital Plan – GI in every
project
• Achieve 100% retention and
demonstrate various
practices:
– Infiltration (porous pavement
– Capture and re-use (cisterns at
muni facilities, use water for
vehicle washing, irrigation, etc.)
– Uptake by plants /
Evapotranspiration
• One high visibility GI project
• Interpretive signage – show &
tell

Make Life Easier: Public
Education and Acceptance
• Public Understanding of GI
and Stormwater
• Embrace of different
landscape aesthetics (less
lawn, more plants)
• Benefits:
– Urban heat island reduction /
energy savings
– Better air quality
– Higher property values
– Increased foot traffic in
downtowns
– Human health (physical and
mental health)
– Habitat – pollinators,
songbirds, amphibians

Resources
• Rutgers!
– GI Guidance Manual for NJ
– Presentation: “Ideas and Resources
for Implementing GI In Your
Community”
– Fact sheets galore
• EPA
– Modeling Tools
– Cost-Benefit Resources page
– Green Infrastructure Wizard:
“GI-Wiz”
– Funding Sources
• Delta Institute’s Green
Infrastructure Toolkit for Property
Owners and Municipalities: Green
Infrastructure Designs: Scalable
Solutions to Local Challenges

Thank you!
Louise Wilson
Green Infrastructure Manager
lwilson@njfuture.org
609-393-0008 ext. 109

Lessons Learned
from Hoboken
NewJerseySocietyofMunicipal
Engineers
Jennifer Gonzalez, Principal Planner
City of Hoboken

Green
Infrastructur
eStrategic
Plan
GreenInfrastructureStrategicPlan

Rainwater
Harvesting
Code §136-2
 Legalized use of rain barrels in 2011
 Rain barrels were previously considered a nuisance
 Any container maintained for the short-term
collection of rainwater must have a properly fitting lid,
be access-resistant to insects and rodents and must
be maintained in good working order at all times and
must be kept in a clean and sanitary way
City Hall

Green Roofs
Code §196-28
 Incentivized use of green roofs in 2015
 Green roofs are encouraged wherever possible
(especially on roofs with surface area of ≥ 5,000 SF)
 If a green roof is provided on at least 50% of the roof
surface, the remainder may be utilized for a roof deck
 Rooftop gardens are considered a green roof and may
cover up to 90% of a roof's surface area
14th & Park Street

Site Plan
Review
Code §196-34
 City requires the submission of a stormwater
management plan with development applications,
“setting forth the proposed method of controlling
and managing stormwater on the site,” but:
 Code does not specify methods for controlling and
managing stormwater
 Code does not require or encourage green
infrastructure as a method
 Planning Board routinely requests that applicants:
 Increase the on-site stormwater detention beyond
that required by NHSA (often successful in
achieving double the required capacity )
 Use green infrastructure for stormwater
management (specifically green roofs and rain
gardens)

Proposed
Amendment
toStormwater
Management
Plan
Code §166
 Current Stormwater Management Plan was
adopted in 2007
 Only applies to major development projects (≥ 1
acre disturbance) in the MS4 area
 Purpose of the proposed amendment is to
supplement the Stormwater Management Plan, tie
in the Green Infrastructure Strategic Plan
 Sets broad stormwater design and performance
standards to address erosion control, groundwater
recharge, stormwater retention, runoff quantity
and runoff quality
 Applies to new development, redevelopment and
disturbance ≥3,000 SF across the entire City
 Ensures that individual property owners are not
limited in how they fulfill regulatory requirements
 Fosters innovation

Proposed
Amendment
toStormwater
Management
Ordinance
Code §166
 Requires using nonstructural BMPs or green
infrastructure to the maximum extent practicable
before using structural BMPs
 If applicant contends that nonstructural BMPs or
green infrastructure are infeasible, applicant bears
the burden of proving infeasibility
 Requires an O&M plan for stormwater management
BMPs
 References, and supersedes, latest NHSATechnical
Requirements for Stormwater Management:
 Focuses on controlling runoff volume, not runoff rate
 Different QuantityVolume method of calculation
 Does not distinguish an application based on sanitary
sewerage flows
 Like NHSA, gives credit for removal of 25%
impervious cover

Green
Infrastructure
inCapital
Projects
Southwest Park
Northwest Park
FirstStreet
WashingtonStreet
City Hall

Green
Infrastructur
eStrategic
Plan
RebuildbyDesign–HudsonRiver

Jennifer Gonzalez AICP, ENV SP
Principal Planner
City of Hoboken
jgonzalez@hobokennj.gov
Thank you!
www.hobokennj.gov
https://www.facebook.com/hoboken
https://twitter.com/cityofhoboken
https://www.instagram.com/hobokennj
https://vimeo.com/hobokennj
https://www.flickr.com/photos/hoboken

Jersey Water Works Green Infrastructure Training at NJ Society of Municipal Engineers 9/14/16 Quarterly Meeting

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