Sustainable in Seattle: From Street Edge Alternatives to City Standards
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Sustainable in Seattle: From Street Edge Alternatives to City Standards
- 1. Sustainable in Seattle: From Street Edge Alternatives to City Standards Presented by: Tracy Tackett, PE Green Stormwater Infrastructure Program Manager Seattle Public Utilities www.seattle.gov/util/naturalsystems
- 2. Today’s presentation Natural Drainage Systems Projects Green Stormwater Infrastructure (GSI) as a requirement of new development Proposed CIP projects
- 4. Pilot blocks
- 9. Goal: flow control via live storage (mini ponds orifice controlled in theory)
- 12. three years of continuous hmonitoring
- 13. 99% reduction in total runoff volume
- 15. 28 acre drainage
- 16. Goal: water quality primary
- 18. 32 acre drainage
- 19. Cascade and SEA street designs
- 20. Goal: flow and water quality
- 22. 2004 2006
- 24. Why Full Street Improvements?
- 27. 49 acre drainage
- 28. Merged Cascade approach into SEAstreet design
- 31. 100 yr + flood I-5 at Chehalis, WA, December 3, 2007
- 33. Swales within planting strip
- 34. Goal: water quality treatment and flow delay
- 36. High Point
- 40. 232 acres
- 44. Details
- 47. Details
- 52. GSI required to MEF
- 54. Directors Rules for clarification of GSI to MEF
- 57. Bioretention – on parcels
- 58. Bioretention– in the Right of Way
- 59. Green Roofs Ballard Library Justice Center Seattle City Hall
- 63. Stormwater Regulations will NOT address the problems alone. 16% developable area anticipated to be retrofitted via Stormwater Code requirements over 50-year time period
- 65. Swale on Yale Designed to treat stormwater runoff from a 160-ac watershed, but at times, can treat the whole watershed (335-acres)
- 67. Integrating GSI into CSO control
- 68. Lakewood Raincatcher Installation of rain gardens and cisterns on private property to reduce downstream impacts and gather information
- 69. Triple Bottom Line Analysis
- 70. CSO Plan Updates- cost curves
- 71. Initiating Green Streets Program
- 72. Initiating Residential Rainwise Contractor reimbursement for construction of GSI on private parcels
Editor's Notes
- 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