Onondaga County CSO Program:Gray-Green InfrastructureHarbor Brook CSO 018 ConstructedWetlands Pilot Treatment SystemJoanne...
2                                    March 2011Project Location                   The project is located                  ...
3                11/18/2010Existing Site
4                                       March 2011Site Enhancement Ultimate Vision                         ▫ Wetland treat...
5                                 March 2011First Step to Site EnhancementDesign andconstruction of a 2acre full scale pil...
6                                               March 2011Conceptual Rendering                       Three types of       ...
7                                                 March 2011Pilot Treatment Wetlands System                   Floating Wet...
8                           March 2011Floating Wetland Islands
9                                                March 2011Pilot Treatment Wetlands System                   Vertical Down...
10                             March 2011Vertical Downflow Wetlands
11                                             March 2011Pilot Treatment Wetlands System                   Surface Flow We...
12                       March 2011Surface Flow Wetland
13                             11/18/2010CSO 018 Treatment Overview
14                                 March 2011Pilot Operations - Series Flow
15                                   March 2011Pilot Operations - Parallel Flow
16                                   March 2011Pilot Operations – Series & Parallel
17                                                       March 2011Pilot Treatment System Benefits• Pilot system will prov...
18                                                                      March 2011Permits and Approvals Required• SPDES Pe...
19                                                                  March 2011Stakeholder Outreach• City of Syracuse      ...
20                                                              March 2011Stakeholder Outreach• Organizations and Not-for-...
21                                                March 2011Project Schedule• Design and stakeholder outreach is underway•...
22                           March 2011Questions and Discussion
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Harbor Brook Treatment Wetlands Design Status - Feb 2012

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Harbor Brook Treatment Wetlands Design Status - Feb 2012

  1. 1. Onondaga County CSO Program:Gray-Green InfrastructureHarbor Brook CSO 018 ConstructedWetlands Pilot Treatment SystemJoanne M. Mahoney, County Executive Prepared for: Onondaga County, Syracuse, New York Prepared by: and March 2011
  2. 2. 2 March 2011Project 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.
  3. 3. 3 11/18/2010Existing Site
  4. 4. 4 March 2011Site Enhancement Ultimate Vision ▫ Wetland treatment of CSO 018 ▫ Grit and floatables removal of CSO 018 ▫ Improved water quality in Harbor Brook ▫ Community park ▫ Educational resource
  5. 5. 5 March 2011First Step to Site EnhancementDesign andconstruction of a 2acre full scale pilottreatment wetlandsystem along HarborBrook at CombinedSewer Overflow(CSO) 018.
  6. 6. 6 March 2011Conceptual Rendering Three types of wetlands will be constructed for pilot testing: Floating Wetland Island, Vertical Downflow, and Surface Flow.
  7. 7. 7 March 2011Pilot Treatment Wetlands System Floating Wetland Island ▫ Vegetation mats planted with diversity of native species ▫ Mats float on water surface with roots in water column ▫ Provides high storage volume without inundating plants ▫ High habitat value ▫ Low mosquito productivity
  8. 8. 8 March 2011Floating Wetland Islands
  9. 9. 9 March 2011Pilot Treatment Wetlands System Vertical Downflow Wetland ▫ Flow is dosed and distributed across surface to percolate through gravel bed ▫ Planted with robust native species to tolerate flooding and draining ▫ No open water and no mosquito productivity
  10. 10. 10 March 2011Vertical Downflow Wetlands
  11. 11. 11 March 2011Pilot Treatment Wetlands System Surface Flow Wetland ▫ Most closely resembles a natural wetland of robust native species ▫ Vegetated shelf and deep water zones to redistribute and aerate ▫ Medium to high storage volume ▫ High habitat value ▫ Low mosquito productivity ▫ Relatively low cost
  12. 12. 12 March 2011Surface Flow Wetland
  13. 13. 13 11/18/2010CSO 018 Treatment Overview
  14. 14. 14 March 2011Pilot Operations - Series Flow
  15. 15. 15 March 2011Pilot Operations - Parallel Flow
  16. 16. 16 March 2011Pilot Operations – Series & Parallel
  17. 17. 17 March 2011Pilot 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
  18. 18. 18 March 2011Permits and Approvals Required• SPDES Permit Modification for CSO 018 – NYSDEC• Article 15 Permit Modification Protection of Waters – NYSDEC• Section 401 Water Quality Certification – NYSDEC• SPDES General Construction Permit – NYSDEC• Nationwide Permit No.7 Outfall Structures – USACE• Nationwide Permit No.43 Stormwater Mgmt. Facilities – USACE• Coordination with NYS Natural Heritage, U.S. Fish & Wildlife Service, and NYS Office of Parks, Recreation and Historic Preservation• OCDWEP – fill and compensatory storage• City of Syracuse Site Preparation Permit (10,000 SF threshold)• City of Syracuse Curb-cut Permit (access to grit & floatables facility)
  19. 19. 19 March 2011Stakeholder Outreach• City of Syracuse • Federal Agencies ▫ Dept of Engineering ▫ U.S. Army Corps of Engineers ▫ Bureau of Planning and ▫ Federal Emergency Sustainability Management Agency ▫ Dept of Public Works ▫ USGS (gauging station) ▫ Dept of Parks and Recreation ▫ Div of Code Enforcement • Organizations and Not-for- profit Groups• New York State Agencies ▫ Atlantic States Legal ▫ Dept of Environmental Foundation, Inc. Conservation ▫ Onondaga Environmental ▫ Dept of Transportation Institute ▫ Onondaga Nation ▫ Westside TNT Neighborhood
  20. 20. 20 March 2011Stakeholder Outreach• Organizations and Not-for- • Schedule profit Groups, continued ▫ March 18 City/County ▫ Syracuse United Neighbors Meeting presentation Westside Coalition ▫ April 7 meeting with Mayor ▫ Partnership for Onondaga and County Executive Creek ▫ Correspondence and ▫ Syracuse Parks Conservancy consultation as needed ▫ Syracuse Chargers Rugby ▫ Presentation to community Club group leaders in mid-April ▫ Catholic Charities• Other Municipalities ▫ Town of Geddes Supervisor
  21. 21. 21 March 2011Project Schedule• Design and stakeholder outreach is underway• Permit submittals and regulatory approvals are critical for schedule• Construction is targeted for 2011• 2 year monitoring period• Planning and design for final wetland treatment system and site enhancement can begin during monitoring period
  22. 22. 22 March 2011Questions and Discussion

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