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.

1. Prepared for: Onondaga County, Syracuse, New York Prepared by: 2011 Onondaga County CSO Program:Gray-Green InfrastructureHarbor Brook CSO 018 Constructed Wetlands Pilot Treatment SystemJoanne M. Mahoney, County Executive and

2. History 1988 – Atlantic States Legal Foundation files lawsuit against County 1989 – Litigation settled through METRO consent judgment 1998 – METRO consent judgment replaced with Amended Consent Judgment (ACJ) 1st ACJ amendment May 1998 2006 ACJ Amended to include consolidation of ammonia and phosphorus treatment and Harbor Brook conveyances and RTF 3rd Amendment April 2008 (Extension) 2009 ACJ amended to authorize use of Gray and Green infrastructure Onondaga Lake Facts Watershed: 285 Square Miles 1 Mile Wide – 4.6 Miles Long Average Depth: 35 feet Max Depth: 63 feet 1940 – Swimming Banned 1970 – Fishing Banned

6. Promote Sustainability

9. Midland Conveyance (CSO 044)

10. Clinton Storage Facility and Electrical Ductbank

11. Harbor Brook Storage Facility and Conveyances

12. Erie Boulevard Storage System (EBSS) Gate Chamber #3 Improvement

13. Sewer separation projects

15. Harbor Brook Storage Project 4.8 Million Gallons of storage (sub-surface) N Designed to capture rain water for system flushing/cleaning State Fair Blvd Captures CSO 003, 004, 063

16. Green Infrastructure Program Save the Rain Program

17. 6.3% Capture Using Green Infrastructure - Green 470 acres and reduce 247 MG/yr of CSO by 2018

18. Dept. of Transportation Parking Lot

19. Manages adjacent impervious areas

20. City Lot #3 - Before

21. Parking Lot #3 Erie Boulevard Erie Boulevard Warren Street James Street Warren Street James Street Porous Concrete Captures over 700,000 gallons of stormwater annually

22. Roadways - Green Streets for Road and Utility Improvement / Reconstruction

23. CSO Treatment Wetland Project CSO 018 Constructed Wetland Harbor Brook

24. Pilot Treatment System Benefits Pilot system will provide immediate water quality improvements: Grit and floatables (onsite at-grade structure) Bacteria Nutrients (nitrogen and phosphorus) Total suspended solids and BOD5 Recommendation from pilot will result in a final permanent wetland treatment system Designed for 1-year, 2-hour storm event, but higher flows and volumes could be accepted May2011 16

25. Existing Site May 2011 17

26. Project Location 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. May 2011 18

27. Site Enhancement Ultimate Vision Grit and floatables removal of CSO 018 Wetland treatment of CSO 018 Improved water quality in Harbor Brook Community park? Educational resource? May 2011 19

29. Vegetated shelf and deep water zones to redistribute and aerate

30. Medium to high storage volume

31. High habitat value

32. Low mosquito productivity

34. Conceptual Rendering May 2011 22 Three types of wetlands will be constructed for pilot testing: Floating Wetland Island, Vertical Downflow, and Surface Flow.

35. 11/18/2010 23 Conceptual Rendering

36. Floating Wetland Islands May 2011 24

37. Vertical Downflow Wetlands March 2011 25

38. Surface Flow Wetland May 2011 26

39. Questions and Discussion May 2011 27

40. 11/18/2010 28 More information

41. Thank You! Please Visit us atwww.SaveTheRain.us