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OC harbor brook wetlands stakeholder 6 15-11 final-1


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The Harbor Brook CSO 018 Constructed Wetlands Pilot Treatment System Project serves the dual purposes of treating CSO 018 overflows currently discharged into Harbor Brook while also acting as a demonstration project to test the effectiveness of three types of constructed treatment wetland systems.

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OC harbor brook wetlands stakeholder 6 15-11 final-1

  1. 1. Prepared for:<br />Onondaga County, Syracuse, New York<br />Prepared by:<br />2011<br />Onondaga County CSO Program:Gray-Green InfrastructureHarbor Brook CSO 018 Constructed Wetlands Pilot Treatment SystemJoanne M. Mahoney, County Executive<br />and<br />
  2. 2. History<br />1988 – Atlantic States Legal Foundation files lawsuit against County<br />1989 – Litigation settled through METRO consent judgment<br />1998 – METRO consent judgment replaced with Amended Consent Judgment (ACJ)<br />1st ACJ amendment May 1998<br />2006 ACJ Amended to include consolidation of ammonia and phosphorus treatment and Harbor Brook conveyances and RTF<br />3rd Amendment April 2008 (Extension) <br />2009 ACJ amended to authorize use of Gray and Green infrastructure<br />Onondaga Lake Facts<br />Watershed: 285 Square Miles<br />1 Mile Wide – 4.6 Miles Long<br />Average Depth: 35 feet<br />Max Depth: 63 feet<br />1940 – Swimming Banned<br />1970 – Fishing Banned<br />
  3. 3.
  4. 4. Save the Rain Program: 2009-2018<br />Regulatory Goals <br /><ul><li>Capture and Treat 95% of the Annual CSO Volume via Gray & Green Infrastructure
  5. 5. Achieve water quality standards in tributaries and lake</li></ul>Community Impacts/Goals<br /><ul><li>Improve quality of life
  6. 6. Promote Sustainability
  7. 7. Ensure cost effectiveness in compliance with ACJ milestones</li></ul>Major Milestones <br /><ul><li>89.5% capture/elimination by 12/31/2013
  8. 8. 95% capture/elimination by 12/31/2018</li></li></ul><li>Gray Infrastructure Program Summary<br />Gray Projects<br /><ul><li>Harbor Brook Interceptor (ARRA)
  9. 9. Midland Conveyance (CSO 044)
  10. 10. Clinton Storage Facility and Electrical Ductbank
  11. 11. Harbor Brook Storage Facility and Conveyances
  12. 12. Erie Boulevard Storage System (EBSS) Gate Chamber #3 Improvement
  13. 13. Sewer separation projects
  14. 14. Floatables Control Facilities</li></li></ul><li>Gray Project Construction Schedule<br />CSO 022/045 Sewer Separation <br />Consent Order Milestones: Complete Construction: 12/31/12<br />Construction Period: September 2011 – June 2012<br /> <br />Clinton Storage Facility<br />Consent Order Milestones: Commence Construction: 10/1/11 <br /> Complete Construction: 12/31/13<br />Construction Period: August 2011 – December 2013<br /> <br />Lower Harbor Brook Conveyances:<br />Consent Order Milestones: Commence Construction: 12/31/11<br /> Complete Construction: 12/31/13<br />Construction Period: September 2011 – June 2012<br /> <br />Lower Harbor Brook Storage:<br />Consent Order Milestones: Commence Construction: 12/31/11<br /> Complete Construction: 12/31/13<br />Construction Period: October 2011 – December 2013<br /> <br />Electrical Duct Bank on West Fayette Street ( Part of Clinton Storage Project)<br />Consent Order Milestones: N/A <br />Construction Schedule: July 2011 – October 2011<br />
  15. 15. Harbor Brook Storage Project<br />4.8 Million Gallons of storage (sub-surface)<br />N<br />Designed to capture rain water for system flushing/cleaning<br />State Fair Blvd<br />Captures <br />CSO 003, 004, 063<br />
  16. 16. Green Infrastructure Program<br />Save the Rain Program<br />
  17. 17. 6.3% Capture Using Green Infrastructure - Green 470 acres and reduce 247 MG/yr of CSO by 2018<br />
  18. 18. Dept. of Transportation Parking Lot<br />
  19. 19. Manages adjacent impervious areas<br />
  20. 20. City Lot #3 - Before<br />
  21. 21. Parking Lot #3<br />Erie Boulevard<br />Erie Boulevard<br />Warren Street<br />James Street<br />Warren Street<br />James Street<br />Porous Concrete<br />Captures over 700,000 gallons of stormwater annually<br />
  22. 22. Roadways - Green Streets for Road and Utility Improvement / Reconstruction<br />
  23. 23. CSO Treatment Wetland Project<br />CSO 018<br />Constructed Wetland<br />Harbor<br />Brook<br />
  24. 24. Pilot Treatment System Benefits<br />Pilot system will provide immediate water quality improvements:<br />Grit and floatables (onsite at-grade structure)<br />Bacteria<br />Nutrients (nitrogen and phosphorus)<br />Total suspended solids and BOD5<br />Recommendation from pilot will result in a final permanent wetland treatment system<br />Designed for 1-year, 2-hour storm event, but higher flows and volumes could be accepted<br />May2011<br />16<br />
  25. 25. Existing Site<br />May 2011<br />17<br />
  26. 26. Project Location<br />The project is located along Harbor Brook on County property just south of Burnet Park on the west side of Syracuse near the Skunk City neighborhood.<br />May 2011<br />18<br />
  27. 27. Site Enhancement Ultimate Vision<br />Grit and floatables removal of CSO 018<br />Wetland treatment of CSO 018<br />Improved water quality in Harbor Brook<br />Community park?<br />Educational resource?<br />May 2011<br />19<br />
  28. 28. Pilot Treatment Wetlands System <br />March 2011<br />20<br />Surface Flow Wetland<br /><ul><li>Most closely resembles a natural wetland of robust native species
  29. 29. Vegetated shelf and deep water zones to redistribute and aerate
  30. 30. Medium to high storage volume
  31. 31. High habitat value
  32. 32. Low mosquito productivity
  33. 33. Relatively low cost</li></li></ul><li>First Step to Site Enhancement<br />May 2011<br />21<br />Design and construction of a 2 acre full scale pilot treatment wetland system along Harbor Brook at Combined Sewer Overflow (CSO) 018.<br />VELASKO ROAD<br />
  34. 34. Conceptual Rendering <br />May 2011<br />22<br />Three types of wetlands will be constructed for pilot testing: Floating Wetland Island, Vertical Downflow, and Surface Flow.<br />
  35. 35. 11/18/2010<br />23<br />Conceptual Rendering <br />
  36. 36. Floating Wetland Islands<br />May 2011<br />24<br />
  37. 37. Vertical Downflow Wetlands<br />March 2011<br />25<br />
  38. 38. Surface Flow Wetland<br />May 2011<br />26<br />
  39. 39. Questions and Discussion<br />May 2011<br />27<br />
  40. 40. 11/18/2010<br />28<br />More information<br />
  41. 41. Thank You! <br />Please Visit us<br />