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Highlands Regional Green Infrastructure Workshop Presentation


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On April 27, 2016, Michele Adams of Meliora Design and Tavis Dockwiller of Viridian Landscape Studio gave a presentation on green infrastructure during a workshop put together by New Jersey Future in partnership with ANJEC. The workshop was held for municipal leaders like mayors, planning and zoning board members, environmental commission leaders, and members of the general public in the Highlands region.

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Highlands Regional Green Infrastructure Workshop Presentation

  1. 1. Highlands Regional Green Infrastructure Workshop New Jersey Future and ANJEC welcome you to the… Wednesday, April 27, 2016
  2. 2. About New Jersey Future . Research✓ Policy✓ Advocacy✓ Assistance✓
  3. 3. New Jersey Future’s Mainstreaming Green Infrastructure program Working with a few key towns to provide education, training and direct technical assistance to improve water quality, reduce flooding and create vibrant, healthy communities. Facilitating and accelerating demonstration projects that show innovative, impressive, effective use of green infrastructure Convening a Green Infrastructure Task Force of developers and design professionals
  4. 4. Highlands Regional Municipal Leaders Green Infrastructure Workshop April 27, 2016
  5. 5. Workshop Participants ANJEC Highlands Coalition Sustainable Jersey Highlands Council New Jersey Future
  6. 6. Agenda Introduction Green Infrastructure 101 Why Does Stormwater Matter? Where is Policy Headed? What is Green Infrastructure? Triple Bottom Line Benefits Green Infrastructure – Making It Happen in Your Town Tools NJ Regulatory Considerations Break Out Session & Discussion
  7. 7. The Hydrologic Cycle
  8. 8. 15” 45 ” 22” 8” Natural Water Cycle Pennsylvania 50” 26” 12” 12”
  9. 9. It wants to be a forest – a tree is the best practice 99% of North America was covered by forest from the Atlantic shoreline to the prairies of the Great Plains. Today only fragments remain. Pre-European settlement Present 14 October 2003
  10. 10. It wants to be a forest, but… 43,480 square miles of blacktop = 5.5 the size of New Jersey
  11. 11. 45”/YR 2” 43” Altered Water Cycle – Impervious Surfaces 50” 3” 0” 47”!
  12. 12. Where does Urban Runoff go?
  13. 13. Into our streams and rivers!
  14. 14. How compacted is this soil? Common Bulk Density Measurements David B. Friedman, District Director -- Ocean County Soil Conservation District Golf Courses, Parks, Athletic Fields 1.69 to 1.97g/cc Undisturbed Lands: Forests & Woodlands 1.03g/cc CONCRETE 2.2g/cc Residential Neighborhoods 1.69 to 1.97g/cc Bulk Density is defined as the weight of a unit volume of soil including its pore space (g/cc or grams/cubic centimeter). Water and air are important components of soil and we must frame our soil concepts so that factors affecting water and air dynamics are included. Thus, we are primarily interested in bulk density and pore space as they affect water and aeration status, and root penetration and development.
  15. 15. Despite decades of detention basins, we still have flooding from development.
  16. 16. • Stream channel erosion releases sediment • Pools and riffles are lost • Large storms cannot reach floodplains • Less recharge = less baseflow • Small streams can go dry • La
  17. 17. Two important observations: 96% of the annual rainfall volume is from storms 3 inches or less Frequency: Most of the time, it rains 1 inch or less Annual Percentages of Volume from Storms
  18. 18. Creating a Built Environment That Looks Like a Forest 26 in. 12 in. 12 in. Evaporation Infiltration Runoff Annual Rainfall 50 in.
  19. 19. Section 438 of the Energy Independence and Security Act (Dec 2009) Design, construct, and maintain stormwater management practices that mimic natural hydrology OR Retain the 95th percentile Rainfall (around 1.7”) EPA’s Direction for Federal Facilities We are seeing variations of this requirement in MS4 NPDES permits in different states. Municipal Separate Storm Sewer System
  20. 20. How we BUILD and how we PLAN Low Impact Development (LID) or Green Infrastructure (GI) “Allow natural infiltration to occur as close as possible to the original area of rainfall. By engineering terrain, vegetation, and soil features to perform this function, costly conveyance systems can be avoided and the landscape can retain more of its natural hydrologic function.” National Association of Home Builders
  21. 21. 22 ” 8” Tools for how we build: • Green roofs • Porous Pavements • Rain Gardens and Bioretention • Cisterns and Reuse
  22. 22. New Development: Suburban Commercial Mixed-Use • Pervious asphalt, stormwater infiltration beds, vegetated swales, rain gardens. • Protect stream, wetlands, woodlands. • Reduce flooding by 33%.
  23. 23. New Development: Residential • High Density Residential • 59 acres • 269 homes: • 146 Townhouses • 96 Quads • 17 Singles • Sinkholes and limestone Can Water be Managed within the landscape?127 small measures, no detention basins.
  24. 24. Each home manages its own runoff in a Rain Garden seepage bed, located in the right-of-way.
  25. 25. Retrofits for Existing Parking Lots and Streets
  26. 26. Schools make up 2% of all impervious cover in the City, but because they are highly visible and associated with education… they present a high priority target for greening. Greening Greenfield Elementary School Philadelphia, PA
  27. 27. “Triple Bottom Line” Benefits • Environmental • Social • Economic
  28. 28. Street Runoff
  29. 29. Street Runoff into Schoolyard = $$ for Greening Schoolyards
  30. 30. Lea School – Captures 2 acres of school and street right-of-way
  31. 31. Waterview Recreation Center Philadelphia, PA 1. Underground infiltration beds with porous concrete surface 2. Porous concrete pavement 3. Trees in trenches 4. Flow-through planter boxes
  32. 32. Before Waterview Recreation Center New Sidewalk that captures street runoff
  33. 33. After
  34. 34. Waterview Recreation Center Flow-Through Planter Box
  35. 35. Bio-retention Water from the street enters through a trench drain Overflow water exits to an inlet
  36. 36. Passyunk and 63rd
  37. 37. Site Analysis Existing Conditions
  38. 38. Passyunk and 61st
  39. 39. Sunoco Refinery
  40. 40. Passyunk and 28th
  41. 41. Porous Paver Plaza
  42. 42. Erie Canal MuseumCity Hall Canal Water Street Syracuse NY
  43. 43. Stormwater PipingPorous Pavers Planter Cells Structural Soil Extents Stormwater Capture Enlargement
  44. 44. 6-8” S-1 Soil Layer: Planting Soil Surface layer. A layer consisting of material with a USDA Texture of sand to loamy sand (S2) amended with organic matter. (must be tested to meet specs after compost is approved and added) 24” S-3 Soil Layer: Planting Soil Drainage Layer consisting of a 6 layer of material with a USDA Texture of coarse sand Stormwater Section
  45. 45. 1st Comprehensive Green Street
  46. 46. Year Completed: 2011 Construction Cost: $837,000 Capture Area: 53,000 sf Square Foot Cost: $15.79/SF Runoff Reduction: 924,000 gal/yr Green Technology: Bioinfiltration Trenches, Porous Pavement, Native Plantings The Facts
  47. 47. Haddon Township Van Sciver School Haddon Township, NJ Philadelphia
  48. 48. PROJECT SITE xxxx Photo Source: Google Maps Van Sciver School Saddlers Woods Project Site
  50. 50. 1 4 2 3 CONSTRUCTION
  51. 51. 4/29/2016 Retrofitting Suburban Basins: Hold 1”
  52. 52. Retrofitting Suburban Basins: Hold 1”
  53. 53. Questions?
  54. 54. Agenda – Part 2 Green Infrastructure – Making It Happen in Your Town Tools • Planning – EPA Scorecard • Design – Rutgers Center for Water Resources NJ Regulatory Constraints Break-out Sessions
  55. 55. Planning Tools: EPA Water Quality Scorecard
  56. 56. Tools: EPA Water Quality Scorecard Protect Natural Resources and Open Space Promote Efficient, Compact Development Patterns & Infill Design Complete, Smart Streets Encourage Efficient Parking Adopt Green Infrastructure Stormwater Management
  57. 57. Tools: EPA Water Quality Scorecard
  58. 58. Tools: EPA Water Quality Scorecard
  59. 59. Tools: Rutgers Green Infrastructure Guidance Manual
  60. 60. Agenda Breakout session
  61. 61. Where are we in the watershed? Phillipsburg Town Byram Township Washington Borough Newton Town Upper Delaware Watershed Wallkill Watershed
  62. 62. Break-out session: What are the opportunities in your town? Break into 4 groups Maps at each table Green Infrastructure Playing Cards at each table Dots for Maps Small Sticky Notes Markers Giant Sticky Notes Pad
  63. 63. Exercises: A. Identify types of GI a. GI that you like/understand would use b. Types of GI that concern you, why? B. Identify Places you might use GI or places you have water trouble a. Green = a good place for GI demonstration projects b. Red = a water trouble spot (flooding or something else) c. Small sticky notes = project/problem descriptions d. Upcoming projects and potential opportunities C. Use large pads and small sticky notes to add important information for examples a. Record group thoughts (large pads) b. Identify potential partners c. Identify barriers to implementation d. Do you need a Code re-write? Intro to Break-out session: What are the opportunities in your town?