Green Streets 101-March 2012.pptxGreen Streets
Northampton, MA
3/29/12
Doug Bisson
Sustainable Communities Building Blocks Program EPA Office of Sustainable Communities
Session One:
Green Streets 101
Session One Overview
Introductions
Workshop Overview
Green Street Definitions
Background
Principles
Design Concepts
Implementation Challenges & Solutions
Trends
Discussion
Introductions
EPA Staff
Jurisdiction Staff
Elected Officials
Key Stakeholders
Green Streets Consultants
Other
Agenda/Workshop Overview
Pre-Workshop Activity
Green Street Audit
Workshop Activity
Afternoon Session: Community Reconnaissance Tour
Session One: Green Streets 101
Session Two: Green Streets Report Card
Session Three: Green Streets Implementation
Session Four: Summary Presentation
Post-Workshop Activity
Background
Program Overview
EPA Office of Sustainable Communities
EPA Building Blocks for Sustainable Communities Initiative
Transform Technical Assistance Work
Build on Lessons Learned During First Round
Smart Growth Implementation Assistance Program
Help Overcome Barriers to Smart Growth
Inform and Educate
Support Implementation
Green Streets Strategy Tool
Green Streets Definition
”A street that uses natural processes to manage runoff at its source”
EPA - “Green Streets: A Conceptual guide to
effective Green Streets Solutions”
”A street right-of-way that, through a variety of design and operational treatments, gives priority to pedestrian circulation and open space over other transportation uses”
City of Seattle - “Right-of-way Improvements Manual”
Green Streets Definition (Cont.)
”Greenstreets enrich the city streets by adding lushness and color to the concrete and asphalt hardscape. These roadside gardens add natural beauty to otherwise barren spaces. Furthermore,
Greenstreets help clean the air and cool the city, while providing food and habitat for migratory birds and pollinators.”
New York city Global Partners - “Best Practice: Greenstreets: Greening Roadways”
Green Streets Principles
Reduce Storm Water Flow
Improve Water Quality
Reduce Urban Heating
Enhance Pedestrian Safety
Reduce Carbon Footprint
Beautify Neighborhoods
Complete/Multi-Modal Streets
Catalyst for Redevelopment
Reduce Stormwater Flow
This can be done by the following:
Reduce peak flow
Reduce flow volumes
Reduce duration of erosive flows
How?
Reduce impervious surfaces
Retain/plant new trees
Promote infiltration/peak flow attenuation
Strategies:
Enhanced vegetation and landscaping strategies
Engineered bioretention soil mixes designed to promote infiltration and water quality treatment
Roughen flow path with plantings and rock to attenuate runoff velocities and provide additional infiltration, decreasing the volume of discharge through pipes to nearby water bodies
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Improve Water Quality
Reduce pollution-generating impervious surfaces
Retain trees
Remove pollutants
Settling
Filtration
Infiltration
Plant uptake
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Reduce Urban Heating
Decrease impermeable surfaces areas and augment vegetative cover
Lessen the amount of radiation absorbed by the surface
Decrease ambient air temperature
Lower energy demands needed to cool urban areas
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Enhance Pedestrian Safety
Alternative street designs
Calm traffic
Provide alternative commuting options
Enhance walkability and aesthetics for pedestrians
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Reduce Carbon Footprint
Encourage a shift in the way people choose to commute through:
Safer pedestrian environments
Bike lanes
Beautified streetscape
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Beautify Neighborhoods
Increase amount and variety of vegetation
Introduce alternative materials and orientation for roads and sidewalks
Improve pedestrian experience
Enhance the character of the community
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Complete / Multi-Modal Streets
Accommodate a variety of modes:
Pedestrian
Bicycle
Transit
Automobile
Context Sensitive
Safe and Enjoyable
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Catalyst for Redevelopment
Development Framework / Enhancement
Special Community Values
“Progressive” Character
Tap into infrastructure
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Green Streets Design Concepts
There are many design elements that can be used
They can be used individually or in combination with other elements
Green Streets Implementation Tools Checklist
Infiltration Strategies
Surface Treatments
Other opportunities
Evaluation of Regional Physical Characteristics
Soil Type
Infiltration Rate
Climate
Temperature
Annual Precipitation Volume
Storm Intensity
Flood Risk
Population/development Density
Northeast
Predominately silty soils
Relatively good infiltration rates
Moderately high annual precipitation volume
Low intensity storms
Above average flood risk
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Generally, sandy soils have higher infiltration rates than silty soils.
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Very small amounts of silt can inhibit infiltration.
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Silts and clays have their place to support vegetative growth.
Must balance silts and clays with sand and gravel.
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For areas with snow and ice, do not use sand or de-icing salt, or shift facilities away from threat.
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Consider appropriate plants (i.e. drought tolerant, native, etc.), rainfall intensity, and duration.
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Mean is one thing, can get a significant portion all at once.
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Typically do not put in flood-prone areas (i.e. 100 and 500-year flood zones). Look at on a site by site basis.
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US Population Density
Green Streets Site Context Evaluation
Urban
Suburban
Rural
Urban
Characteristics
High traffic (vehicular, bike, ped)
Limited available space
Work around utilities
Multi-purpose design, combine elements
Effective project types
Utilize Checklist
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Suburban
Characteristics
Design details based on available space and what is down-stream from site
New and retrofit
Incorporate existing landscape elements
Effective project types
Utilize Checklist
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Rural
Characteristics
Less dense
Use of given ROW
Wide expanses of pavement
Effective project types
Utilize Checklist
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Green Streets Case Studies by Region
Northeast
South
Midwest
Northwest
Southwest
Northeast
Western Avenue – Cambridge, MA
Alternative street design
Raised cycle tracks reduce conflicts and promote non-vehicular travel
Streetscape enhancements reinforce residential character
Road diets reduce speeds and create open space opportunities
Rain gardens
Treatment of stormwater runoff through infiltration
Pervious asphalt cycle track
Reduce untreated runoff to Charles River
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Northeast
Capital Project #1– Tredyffrin Township, PA
Alternative Street Design
Road diet allows for rain garden curb extensions and sidewalk installation
Concrete sidewalks with ADA pedestrian ramps were added to underserved routes
Route was defined by Planning Board Sidewalk Subcommittee
Raised pedestrian crosswalk increases pedestrian visibility
Rain Gardens with Check Dams at Curb Extensions
Intercept flow from roadway and sidewalk,
infiltrating stormwater into the ground
Infiltration Trench Along Route
Trenches under concrete sidewalks intercept and infiltrate flow from roadway and parcels
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Sidewalks and Opportunity
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Google Maps – Keller Road at W. Conestoga Road 19312
Northeast
Jordan Cove LID Subdivision – Waterford, CT
Low Impact Design Subdivision
Cluster design of homes allows for more open space preservation and shorter driveways
Pervious pavers and grass swales were used to replace traditional catch basins and curb and gutter systems
Road dieting reduced street widths from 28’ to 20’
Required waiver from City
One-way cul-de-sac with Bioretention Island
Rain Gardens
Intercept overland roof drain flow for treatment, infiltration, and evapotranspiration
Pervious Pavers
Infiltrate stormwater runoff from roadway
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South
Green Government Center– Jackson, MI
Indigenous and drought-tolerant landscaping
Attenuation of stormwater runoff
Provide shade for pedestrians
Rain gardens
Treatment of stormwater runoff through infiltration
Permeable paving systems
Increase infiltration of runoff
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South
Juniper Street – Atlanta, GA
Alternative street design
Provide alternative commuting options
Enhance safety and aesthetics for pedestrians
Provide greater pedestrian safety and walkability
Bioswale system
Attenuate stormwater flows
Alleviate stress on CSO’s through bioswale infiltration
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South
Main Street corridor – Little Rock, AR
Rain gardens with native plants
Attenuate stormwater flows
Treat stormwater through infiltration
Street trees
Native species tolerate urban environments
Provide shade for pedestrians
Reduced ambient air temperature
Permeable pavement
Decrease stormwater runoff
Alternative street design
Active pedestrian environment
Equitable mobility
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Midwest
CDOT Green Alleys – Chicago, IL
Permeable Pavements
Attenuate stormwater runoff
Open bottom catch basins
Capture water and funnel it into the ground
High-albedo pavement
Reflect sunlight instead of absorbing, reducing the Heat Island Effect
Recycled Materials
Concrete aggregate, slag, and recycled tire rubber
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Midwest
Prairie Crossing Subdivision – Grayslake, IL
Alternative street edges, vegetated swales, bioretention, and preservation of natural areas
Reduction in magnitude and velocity of runoff
Increase in runoff infiltration, helping sustain low flows during summer
Improve water quality
Alternative walkway materials
Increase pervious area
Reduce stormwater runoff through infiltration
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Midwest
Autumn Trails – Moline, IL
Permeable paving systems
Increase runoff through infiltration
Eliminate need for conventional storm-water drainage
Savings from alternate paving materials were cost-competitive with conventional asphalts and concrete pavements
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Northwest
Broadview Green Grid - Seattle Public Utilities and SDOT
Increase in landscaped areas
Reduce runoff quantity and velocity
Increase runoff infiltration, helping sustain low flows during summer
Improve water quality
Sidewalk addition
Calm traffic
Provide greater pedestrian safety and walkability
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Northwest
Crown Street, Vancouver, British Columbia
Roadside swales, vegetation, and structural grass
Collect and infiltrate roadway runoff
Street widths reduction
Create a pedestrian-friendly transportation corridor
Calm traffic
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Northwest
NE Siskiyou Green Street – Portland Bureau of Environmental Services
Landscaped stormwater curbed extensions
Attenuate stormwater flows
Enhance water quality through infiltration
Provide greater pedestrian safety and walkability
Beautify landscape
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Southwest
Lower Grand Avenue – Phoenix, AZ
Native plant landscaping
Capture and treat stormwater runoff
Increase recharge
Reduce the effect of the urban heat island
Provide shade to pedestrians
Alternative street design
Rerouting of street through under-used park area
Equitable mobility
Support the ongoing economic revitalization of Grand Avenue
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Southwest
22nd Street Corridor Plan –
Tucson, AZ
Alternative street design
Active pedestrian environment
Provide alternative commuting options
Decrease the number of residential and commercial relocations
Reduce the impact of traffic and noise on the adjoining neighborhood
Native plant landscaping
Capture and treat stormwater runoff
Increase recharge
Reduce the effect of the urban heat island
Provide shade to pedestrians
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Implementation Challenges
Maintenance
Weather
Narrow Streets
Land Consumption
Multi-purpose Benefits
Regulations
Funding
Trends
Maintenance
Long-term O&M standards and guidelines
i.e. Bellevue, WA
Staff training/skills – a shift
Regional considerations
Pressure wash and vacuum sweep 2X/year
Budgeting ensures success!
A Line item to allow for maintenance
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Source: City of Bellevue, WA, Storm and Surface Water Maintenance Standards, February, 2010.
Weather
Mean annual precipitation
Rainfall intensity
Temperature
Snow accumulation
Snow management practices
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Narrow Streets
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Traffic calming
Relatively high cost-benefit on GSI investments
Creativity counts!
Land Consumption
Prioritize design solutions that provide multiple benefits and maximize space
Reduce land consumption and save on ROW acquisition
Silva Cell tree planter system
Rain garden
Street tree
Pervious paving
Multi-purpose Benefits
Design to provide large-scale multi-purpose benefits across entire watersheds/basins
Bel-Red Corridor in WA Integrates:
Co-located parks with regional stormwater facilities
Regional wetland mitigation
Habitat creation
Passive recreation
Aesthetic neighborhood enhancements
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Regulations
Multiple regulations to understand
Federal, state, and local
EPA Stormwater regulations are changing (95th percentile rainfall standard)
This will be a significant change for jurisdictions that lack formal flow control design standards
Funding
Stormwater Utility to collect funding
Local Improvement Districts (LIDs) / Utility LID (ULIDs) to raise funding
City funding for dedication of open space
Real Estate Excise Tax (REET)
Parks Levy
Parks Mitigation Funding
Dedication through Incentives
Grants
Fee-in-lieu
City builds and developers pay into fund
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Trends
Consensus Guidelines (look to others)
Formalize policies and guidelines
Commitment to Maintenance
Funding
Limitations of traditional infrastructure
Need a mix
Smart Growth Emphasis
Education and Outreach
Discussion
Session Two:
Green Streets Report Card
Session Two Overview
Pre-Workshop Activity
Green Streets Audit
Review of the Following
Community’s Green Streets Vision/Goals and Reason for Assistance
Community’s Green Streets Implementation Tools
Community’s Current Green Streets Projects
Community’s List of Potential Locations for Future Green Streets
Summary
Northampton’s Green Streets Vision / Goals and Reason for Assistance
Transportation Vision from Northampton Transportation Policies and repeated with slightly different language in the Sustainable Northampton Comprehensive Plan.
Vision: “It is the intention of the City of Northampton to have a transportation system that encourages sate and convenient movement of people and goods. Northampton’s transportation
system must allow for the safe and efficient transportation of goods and people by automobiles, trucks, and other motorized vehicles and by bicycle and on foot. They City’s transportation
system should be a multimodal one that provides many different types of transportation options.”
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Northampton’s Green Streets Vision / Goals and Reason for Assistance
Environmental Goal from the Sustainable Northampton Comprehensive Plan.
Goals:
“Minimize the impacts of infrastructure systems on environmental resources…encourage and enforce low impact development designs…include “low impact” and NPDES drainage improvements concurrent
with any pavement management program or project…
“Safeguard and improve the quality of the City’s surface waters to ensure use for safe public swimming, recreational fishing activities, boating, and drinking”
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Community’s Green Streets Vision / Goals and Reason for Assistance
Complete Street
Reasons for Assistance:
Northampton does many of the components of Green Streets (especially a complete streets approach and to a lesser extent addressing stormwater) but does not have a single street that
can be called a Green Street. There is a desire to move towards this fuller Green Streets approach.
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Northampton’s Green Streets Vision / Goals and Reason for Assistance
Main Street
Reasons for Assistance:
Northampton understands many of the components of Green Streets, but feels the biggest gaps are for sites that are spatially extremely tight.
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Northampton’s Green Streets Vision / Goals and Reason for Assistance
Reasons for Assistance:
Northampton needs to build political consensus, both internally and externally, on the benefits of green streets, especially as the City starts retrofitting streets and exploring whether
a stormwater utility makes sense for the City.
Northampton’s Green Streets Vision / Goals and Reason for Assistance
Reasons for Assistance:
Northampton does a great job of ensuring stormwater control (both quality and quantity) in suburban areas. The City does not do as well in urban areas where real estate is limited and
it is not desirable to lose development potential that is necessary for pedestrian-friendly urban critical mass.
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Northampton’s Green Streets Vision / Goals and Reason for Assistance
Reasons for Assistance:
Northampton understands the qualitative benefits of Green Streets measurements, but needs more quantitative performance data.
Northampton’s Existing Green Street Implementation Tools
Northampton Subdivision Regulations
Chapter 290, Subdivision of Land
Mass. Dept. of Environmental Protection Stormwater Handbook
Stormwater, Stormwater Policies and Guidance
Northampton’s Existing Green Street Implementation Tools
City Stormwater Regulations
Chapter 281, Stormwater Management
City Transportation Policies
Transportation Vision and Policies
Northampton’s Existing Green Street Implementation Tools
Sustainable Northampton Comprehensive Plan
Northampton Wetlands Ordinance
Chapter 337, Wetlands Protection
Northampton’s Existing Green Street Design Tools
No Existing Green Streets
Have many Components of Green Streets within the City
Design Tools by Type:
Infiltration strategies
Surface Treatment
Other opportunities
Infiltration Strategies
Rain Gardens
None on City Streets
Rain Gardens/Bio Retention on Some Projects
New Senior Center
New Private L-3 Keo Facility
Problem with Snow Plowed into these Areas
Photo Area
Infiltration Strategies
Curb and Gutter Elimination
None on City Streets
Vegetated Swales
Many private parking lots
Small section on North Farms Road
Infiltration Trenches
Recently constructed Conz Street
New Subdivision on Musante Drive
Stormwater Planters
None on City Streets
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Infiltration Strategies
Stormwater Curb Extensions
None on City Streets
Vegetated Filter Strips
Very extensive (for 40 years) for every development in the City and wetlands
Applies to all new projects and reconstruction of existing projects
Tree Box Filters
None
Riparian Buffers
Very extensive (for 40 years) for every project along a river
Applies to all new projects and reconstruction of existing projects
Surface Treatment
Permeable Paving
None on City Facilities
Florence Fields (New City Recreation Area) will use for Overflow Parking
Some Private Projects
Microcal Parking Spaces
All current examples use Permeable Block Pavers
No examples of Permeable Asphalt or Concrete
Concerns about Sand and Maintenance Needs
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Surface Treatment
High Albedo Pavement
None deliberately
For design and durability reasons, push concrete (highly reflective) for downtown and urban sidewalks
Recycled Materials
None
State rail trail uses recycled glass aggregate (glass works its way to surface)
Widely viewed as a failure, limiting new efforts
A few plastic structures use recycled content – not a deliberate choice
Other Opportunities
Sand and Organic Filters
None used
Soil amendments
Limited use on streets
Conz Street infiltration Swale
Used very extensively in drainage retention ponds to increase infiltration rates and catch silt and fine materials
Other Opportunities
Inlet Protection Devices
Used on every construction project
Not used after construction phase unless stormceptors are used
Artificial wetlands are generally used between new stormwater outlet structures and wetlands and waterways
Preservation of Natural Areas
The City is extremely aggressive
Purchases over 0.5% of the City as natural open space each year
Other Opportunities
Road Dieting
Some limited efforts on the ground
Conz Street narrowed lanes
Conceptual planning for more aggressive lane drops
Main Street and King Street
Green Parking Design
Every public and private parking lot above certain thresholds is very aggressive about sidewalk and tree plantings
Stormwater ranges from innovative to traditional curbs and detention ponds
Zoning allows parking lots to be covered with PV (none to date)
Photo Area
Other Opportunities
Native Vegetation
Required
Used for street trees and many drainage facilities
Alternative Street Design
Complete streets policy in place and followed aggressively
Clear Policy and Strong commitment
Some great successes – Elm Street
Some projects underway and being improved – South Street
Roundabouts – one built and two under design
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Community’s Current Green Streets Projects
Location 1
X
X
(To be filled in prior to Workshop based on results of Respective Community’s Green Streets Audit)
Community’s Current Green Streets Projects
Location 2
X
X
(To be filled in prior to Workshop based on results of Respective Community’s Green Streets Audit)
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Community’s Current Green Streets Projects
Location 3
X
X
(To be filled in prior to Workshop based on results of Respective Community’s Green Streets Audit)
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Northampton’s List of Potential Locations for Future Green Streets
Location 1: North Street
At Market Street & Bridge Street Cemetery
About to undergo full depth reconstruction
Neighborhood street that carries fair amount of traffic between downtown and industrial park
Constrained corridor
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Northampton’s List of Potential Locations for Future Green Streets
Location 2: Main Street
City Hall/Crackerbarrel Alley/Crafts Avenue Area
Heart of pedestrian vibrant downtown
Potential road diet and new streetscape park with green drainage strategies
Possible new bus transit pulse point
“Pavement to Parks”
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Northampton’s List of Potential Locations for Future Green Streets
Location 3: Moser Street
New residential subdivision street in dense MU development
Not retrofit, but discussion about subdivision regulation requirements
Excellent Transportation Features
Opportunity to explore better drainage/LID options
Northampton’s List of Potential Locations for Future Green Streets
Location 4: South Street
Lyman to Revell
Major arterial (Route 10)
Front Door to residential neighborhood
Aggressive road dieting in future, with possibility to create cycle track
Green Streets Report Card Summary
Discussion of Northampton’s current efforts, barriers, and implementation of kit of parts
Green Streets Report Card Summary
Discussion of new practices that could be applicable / implemented within Northampton
Green Streets Report Card Summary
Identify and discuss locations within Northampton that may be suitable for future implementation of Green Street design solutions
Green Streets Report Card Summary
Discussion of community’s current efforts, barriers, and implementation of kit of parts relative to nationwide green streets design solutions discussed in Green Streets 101
(To be filled in prior to Workshop based on results of Respective Community’s Green Streets Audit)
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Green Streets Report Card Summary
Discussion of new practices that could be applicable / implemented within the community
(To be filled in prior to Workshop based on results of Respective Community’s Green Streets Audit)
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Green Streets Report Card Summary
Identify and discuss locations within the community that may be suitable for future implementation of Green Street design solutions
(To be filled in prior to Workshop based on results of Respective Community’s Green Streets Audit)
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Session Three:
Green Streets Implementation
Session three Overview
Small Group Interactive Exercise
Utilize information from previous sessions
Explore green streets design solutions for real locations within the community
North Street
Main Street
Moser Street
South Street
Instructions
Break into small groups
Select a group leader
Assigned a location within the community
Provide aerial photos/base maps, site photos, and colored markers
Develop a green streets design solution for your site
Present your solution back to the large group
Green Streets Implementation
Small Group Exercise
10:30 to 11:15
Group Presentations
11:15 to 11:45
Session Four:
Green Streets Summary Presentation
Green Streets Summary Presentation Overview
Green Streets Maintenance
Green Streets Funding
Next Steps
Green Streets Maintenance
Level of Effort Required
Jurisdictional Responsibility
Level of Effort Required
Bioretention curb extensions, sidewalk planters, trees and tree boxes
Annual Maintenance
Watering , weeding, and mulching
Dependant on climate and vegetation resistance
Frequency of landscape maintenance and soil replacement is based on historical data and experience
Adequate funding should be established to provide timely and appropriate maintenance
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Level of Effort Required
Permeable Pavements
Air sweeper maintenance
Traffic volume
Regional climate conditions
Power washing
Unclog upper layer
Restore desired infiltration rate
Annual infiltration testing and inspection
Implement failure replacement procedures where infiltration drops below design level
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Jurisdictional Responsibility
In right-of-way
Local government entity is responsible for maintenance operations
Agreements between local jurisdiction community home owner associations can transfer maintenance responsibilities
Outside the right-of-way
Homeowners within the local community are responsible for natural drainage system maintenance
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Green Streets Funding
Costs and Funding Sources
Grants
Integrated Approach
Additional Resources
Costs and Funding Sources
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WERF BMP and LID Whole Life Cost Models: Version 2.0
Set of spreadsheet tools used for life cycle cost automation
Identify whole life cost and the combination of capital and ongoing maintenance costs
Model Costs
Derived from literature
Cost-estimating techniques
Derived from US stormwater agencies
Tool and further Information
www.werf.org/i/a/K/Search/ResearchProfile.aspx?ReportId=SW2R08
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Funding Sources
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Federal
Surface Transportation Bill
American Recovery and Reinvestment Act of 2009 (ARRA)
Environmental Protection Agency (EPA) Grants
State
Transportation Improvement Program Grants
“Smart Transportation”
Infrastructure improvements
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Grants
Energy and Environmental Block Grant (EEBG) Program
Funding to Local and state governments
Energy efficiency and climate protection strategies
Enterprise Green Communities Charrette Grants
$5,000/project
Aid developers to produce design with green and healthy outcomes
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Integrated Approach
Green Highways Partnership
Chesapeake Bay Anacostia
Green Streets, Green Jobs, Green Towns Initiative (G3 Initiative)
G3 Academy
Team with the EPA to review and fund eligible projects through multiple sources
Combine tools and funding sources to make an impact
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Integrated Approach
Transportation Reform Funders Group (TRFG)
Government and non-government funders interested in the benefits of transportation projects for:
Climate Change
Economic Development
Equity and Opportunity
Health
Smart Growth America
Partners with states and cites to help facilitate effective spending of stimulus money
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Additional Resources
Websites
www.epa.gov/smartgrowth/greencapitals.htm
water.epa.gov/infrastructure/greeninfrastructure
www.greenhighwayspartnership.org
www.smartgrowthamerica.org
www.lowimpactdevelopment.org/greenstreets
www.werf.org
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Source: Downloaded from
www.urbanitebaltimore.com on 3.15.2012
Source: Downloaded from
www.urbanitebaltimore.com on 3.15.2012
Additional Resources
Reports
EPA. (2009, August). Green Streets: A Conceptual guide to Effective Green Streets Design Solutions. Retrieved March 6, 2012, from EPA: www.epa.gov/greeninfrastructure
National Complete Streets Coalition. (n.d.). Sustainable Complete Streets. Retrieved March 6, 2012, from EPA: www.epa.gov/greeninfrastructure
Water Environment Research Foundation. (2009). WERF User’s Guide to the BMP and LID Whole Life Cost Models Version 2.0 . Alexandria: Water Environment Research Foundation.
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Next Steps Discussion
Implementation / Policy Change
“Lessons learned”
Additional Feedback
Notes:
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