Sustainable in Seattle: From Street Edge Alternatives to City Standards<br />Presented by:<br />Tracy Tackett, PE<br />Gre...
Today’s presentation<br />Natural Drainage Systems Projects<br />Green Stormwater Infrastructure (GSI) as a requirement of...
Natural Drainage Systems<br /><ul><li>Initiated in 1999
Pilot blocks
Pilot catchments
Pilot partnering</li></li></ul><li>       Green Stormwater Infrastructure<br />Tries to make       …function more<br />thi...
SEA Street #1 <br /><ul><li>660 LF
2.3 acre drainage
Goal: flow control via live storage (mini ponds orifice controlled in theory)
Constructed 2000</li></li></ul><li>The SEA Street Prototype<br />
SEA Street #1 Monitoring <br /><ul><li>University of Washington
three years of continuous hmonitoring
99% reduction in total runoff volume
Learned: standard geotech assumptions should be questioned</li></li></ul><li>NW 110th Cascade<br /><ul><li>1400 LF
28 acre drainage
Goal: water quality primary
Constructed 2003</li></li></ul><li>Broadview Green Grid<br /><ul><li>4,500 LF
32 acre drainage
Cascade and SEA street designs
Goal: flow and water quality
Constructed 2004</li></li></ul><li>Broadview Green Grid<br />Monitoring location<br />SEA Streets and Cascades<br />
2004<br />2006<br />
Broadview Green Grid<br />
Why Full Street Improvements?<br />
Pinehurst Green Grid<br /><ul><li>3,800 LF
49 acre drainage
Merged Cascade approach into SEAstreet design
Constructed 2005</li></li></ul><li>SEA Street Design<br />
100 yr + <br />flood<br />I-5 at Chehalis, WA, December 3, 2007<br />
High Point – partnering with Housing Authority<br /><ul><li>120 acre drainage
Swales within planting strip
Goal: water quality treatment and flow delay
Constructed 2005-2009</li></li></ul><li>High Point<br />
High Point<br />
Natural Drainage Systems<br /><ul><li>65 blocks
232 acres
$17M</li></li></ul><li>Green Stormwater Infrastructure (GSI) standards<br />Right-of-way Improvement Manual<br />Stormwate...
Right-of-Way Improvement Manual <br /><ul><li>Guidance where SEA Streets can be considered
Bioretention Information
Details
Bioretention soil specification
Permeable Pavement
Details
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Sustainable in Seattle: From Street Edge Alternatives to City Standards

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  • Stormwater Pollutant Reductions - Green Infrastructure techniques infiltrate runoff close to its source and help prevent pollutants from being transported to nearby surface waters. Once runoff is infiltrated into soils, plants and microbes can naturally filter and break down many common pollutants found in stormwater.
  • Lesson learned – monitoring a great ideaConservative design. Native soil infiltration rates. Soil storage
  • Stormwater Pollutant Reductions - Green Infrastructure techniques infiltrate runoff close to its source and help prevent pollutants from being transported to nearby surface waters. Once runoff is infiltrated into soils, plants and microbes can naturally filter and break down many common pollutants found in stormwater.
  • Stormwater Pollutant Reductions - Green Infrastructure techniques infiltrate runoff close to its source and help prevent pollutants from being transported to nearby surface waters. Once runoff is infiltrated into soils, plants and microbes can naturally filter and break down many common pollutants found in stormwater.
  • Flow control with underdrain
  • Sustainable in Seattle: From Street Edge Alternatives to City Standards

    1. 1. Sustainable in Seattle: From Street Edge Alternatives to City Standards<br />Presented by:<br />Tracy Tackett, PE<br />Green Stormwater Infrastructure Program Manager<br />Seattle Public Utilities <br />www.seattle.gov/util/naturalsystems<br />
    2. 2. Today’s presentation<br />Natural Drainage Systems Projects<br />Green Stormwater Infrastructure (GSI) as a requirement of new development<br />Proposed CIP projects<br />
    3. 3. Natural Drainage Systems<br /><ul><li>Initiated in 1999
    4. 4. Pilot blocks
    5. 5. Pilot catchments
    6. 6. Pilot partnering</li></li></ul><li> Green Stormwater Infrastructure<br />Tries to make …function more<br />this…like this.<br />
    7. 7. SEA Street #1 <br /><ul><li>660 LF
    8. 8. 2.3 acre drainage
    9. 9. Goal: flow control via live storage (mini ponds orifice controlled in theory)
    10. 10. Constructed 2000</li></li></ul><li>The SEA Street Prototype<br />
    11. 11. SEA Street #1 Monitoring <br /><ul><li>University of Washington
    12. 12. three years of continuous hmonitoring
    13. 13. 99% reduction in total runoff volume
    14. 14. Learned: standard geotech assumptions should be questioned</li></li></ul><li>NW 110th Cascade<br /><ul><li>1400 LF
    15. 15. 28 acre drainage
    16. 16. Goal: water quality primary
    17. 17. Constructed 2003</li></li></ul><li>Broadview Green Grid<br /><ul><li>4,500 LF
    18. 18. 32 acre drainage
    19. 19. Cascade and SEA street designs
    20. 20. Goal: flow and water quality
    21. 21. Constructed 2004</li></li></ul><li>Broadview Green Grid<br />Monitoring location<br />SEA Streets and Cascades<br />
    22. 22. 2004<br />2006<br />
    23. 23. Broadview Green Grid<br />
    24. 24. Why Full Street Improvements?<br />
    25. 25.
    26. 26. Pinehurst Green Grid<br /><ul><li>3,800 LF
    27. 27. 49 acre drainage
    28. 28. Merged Cascade approach into SEAstreet design
    29. 29. Constructed 2005</li></li></ul><li>SEA Street Design<br />
    30. 30.
    31. 31. 100 yr + <br />flood<br />I-5 at Chehalis, WA, December 3, 2007<br />
    32. 32. High Point – partnering with Housing Authority<br /><ul><li>120 acre drainage
    33. 33. Swales within planting strip
    34. 34. Goal: water quality treatment and flow delay
    35. 35. Constructed 2005-2009</li></li></ul><li>High Point<br />
    36. 36. High Point<br />
    37. 37.
    38. 38.
    39. 39. Natural Drainage Systems<br /><ul><li>65 blocks
    40. 40. 232 acres
    41. 41. $17M</li></li></ul><li>Green Stormwater Infrastructure (GSI) standards<br />Right-of-way Improvement Manual<br />Stormwater requirements: Stormwater Infrastructure (GSI) as a requirement of new development<br />Proposed CIP projects<br />
    42. 42. Right-of-Way Improvement Manual <br /><ul><li>Guidance where SEA Streets can be considered
    43. 43. Bioretention Information
    44. 44. Details
    45. 45. Bioretention soil specification
    46. 46. Permeable Pavement
    47. 47. Details
    48. 48. Approved Permeable Pavement List</li></li></ul><li>
    49. 49. City of Seattle Stormwater Code <br />(SMC 22.800 – 22.808)<br /><ul><li>Green Stormwater Infrastructure (GSI) minimum design requirements
    50. 50. GSI modeling inputs
    51. 51. Presized facilities
    52. 52. GSI required to MEF
    53. 53. In ROW, 2-year GSI maintenance agreement required</li></li></ul><li>City of Seattle Stormwater Code <br />-Implementation<br /><ul><li>Review/inspector checklist
    54. 54. Directors Rules for clarification of GSI to MEF
    55. 55. O&M inspector checklists
    56. 56. City staff training</li></li></ul><li>Bioretention – on parcels<br />
    57. 57. Bioretention – on parcels<br />
    58. 58. Bioretention– in the Right of Way<br />
    59. 59. Green Roofs<br />Ballard Library<br />Justice Center<br />Seattle City Hall<br />
    60. 60. Rainwater Harvesting<br />
    61. 61. Permeable Pavement<br />
    62. 62.
    63. 63. Stormwater Regulations will NOT address the problems alone. <br />16% developable area anticipated to be retrofitted via Stormwater Code requirements over 50-year time period<br />
    64. 64. Capital Improvement Projects<br />
    65. 65. Swale on Yale<br />Designed to treat stormwater runoff from a 160-ac watershed, but at times, can treat the whole watershed (335-acres)<br />
    66. 66.
    67. 67. Integrating GSI into CSO control<br />
    68. 68. Lakewood Raincatcher<br /> Installation of rain gardens and cisterns on private property to reduce downstream impacts and gather information<br />
    69. 69. Triple Bottom Line Analysis<br />
    70. 70. CSO Plan Updates- cost curves<br />
    71. 71. Initiating Green Streets Program<br />
    72. 72. Initiating Residential Rainwise<br />Contractor reimbursement for construction of GSI on private parcels<br />
    73. 73. Questions?<br />www.seattle.gov/util/naturalsystems<br />
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