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Proposed Stormwater Wetland Project : A Public-Private Partnership

Proposed Stormwater Wetland Project : A Public-Private Partnership. Federal Realty Investment Trust (FRIT) Eastgate Shopping Center Chapel Hill, NC September 9, 2008. Project Purpose. Community benefits Public use and enjoyment Water quality education Passive recreation (greenway spur)

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Proposed Stormwater Wetland Project : A Public-Private Partnership

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  1. Proposed Stormwater Wetland Project: A Public-Private Partnership Federal Realty Investment Trust (FRIT) Eastgate Shopping Center Chapel Hill, NC September 9, 2008

  2. Project Purpose • Community benefits • Public use and enjoyment • Water quality education • Passive recreation (greenway spur) • Environmental benefits • Water quality • Wildlife habitat preservation and enhancement • Floodplain storage • Meets RCD goals and objectives • Demonstrates BMP retrofit in Jordan Lake watershed

  3. History of site tells story of development in harm’s way • Runoff and pollutants are generated • Mitigation and education is the way forward=

  4. Overview of Watershed • Approx. 60 acre watershed • 60% residential • 30% commercial • 10% undeveloped

  5. Conceptual Wetland Design • Site is Ur (Urban) soils (previously disturbed) • Treat TN and TP to the extent possible using DWQ design methods • Boardwalk with educational overlooks and signage Example of constructed wetland design

  6. A conceptual sketch of proposed wetland, based on EEP study (CH2MHill 2007)

  7. Existing plat with proposed wetland site and existing easements 30’ OWASA easement Proposed wetland site

  8. Project site

  9. Summary of FRIT Proposal • In coordination with Town, FRIT designs stormwater wetland and boardwalk to CD/ZCP permit stage • FRIT turns over permitted CDs to Town • FRIT donates land (ca. 2 – 3 acres) to Town • Proposed design schedule is 12 months • Town constructs wetland within a 3-year period from land transaction

  10. Water Quality Benefits

  11. Subwatershed of Jordan Lake • Identified by Town of Chapel Hill as BL10 • Booker Creek drains to Jordan Lake

  12. A Sampling of Stormwater conditions to mitigate in this sub-basin Pre-FIRM Development Stream Bank Erosion & Poor water quality Sedimentation

  13. Lower Booker Creekan impaired stream • “Impaired” – • Listed in 2000 by NC Division of Water Quality on 303(d) list as “biologically impaired” • Still listed in 2008 • Nutrient Sensitive Water (NSW) • Water Supply Watershed (WS-IV) • Subject to Jordan Lake TMDL (Total Maximum Daily Load) for nutrients • “High priority” restoration site identified by EEP and TMDL trading study

  14. Booker Creek water qualitydata – fair to poor Source: Haw River Assembly

  15. Source: CH2MHill (2007)

  16. TMDL Trading Study concurs

  17. Community Benefits Recreation, wildlife habitat, and public education

  18. Lower Booker Creek Linear Park (Town of Chapel Hill Master Plan) • Bicycle and pedestrian greenway trail plan previously approved by Town of Chapel Hill • Links existing and anticipated residential and commercial employment centers between US15-501, Franklin Street and Elliot Road • Provides scenic beautification, public education, and environmental restoration of the Lower Booker Creek corridor

  19. (Old) Lower Booker Creek Linear Park • Map shows initial plan using DOT Enhancement Grant • FRIT-proposed wetland is larger than that shown in this concept plan, and smaller than the proposed TMDL wetland

  20. Lower Booker Creek Trail (Town of Chapel Hill Parks Master Plan) • Spur trail proposed as part of the wetland project • Provides water quality and natural resource education around wetland site

  21. Wildlife Habitat • Existing vegetation is not very beneficial for wildlife habitat - invasive species, non-native species, and non-beneficial natives • Proposed wetland will enhance wildlife habitat by utilizing beneficial existing vegetation, and planting additional beneficial native vegetation

  22. Public Education • Spur trail and wetland boardwalk with wildlife habitat and water quality signage

  23. FRIT Coordination Design and permitting team will coordinate directly with Town staff Legal council will coordinate directly with Town Attorney FRIT and Town will hold meetings as needed throughout the design and legal coordination process, proposed to be 12 months

  24. Anticipated Permitting Needed • State (401) certification • Federal (404) permit • Town of Chapel Hill RCD Encroachment • Administrative Zoning Compliance Permit • Sedimentation and Erosion Control (Orange County)

  25. Next steps • Input from stakeholders will be considered • FRIT and Town will reach agreement concerning process and timelines • Wetland design, coordination, and permitting commences (by FRIT) • 12 month design process • Town may apply for grants and consider other financing options to construct wetland and boardwalk • Town will construct within a 3-year period from design completion and land transfer

  26. Questions?

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