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Rivanna Water & Sewer Authority Community Water Supply Mitigation Plan

Rivanna Water & Sewer Authority Community Water Supply Mitigation Plan. Public Meeting November 2, 2006. Agenda. Impacts to Be Mitigated Stream Mitigation Plan Wetland Mitigation Plan Mitigation Costs Schedule for Next Steps Public Comment. Impacts to be Mitigated.

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Rivanna Water & Sewer Authority Community Water Supply Mitigation Plan

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  1. Rivanna Water & Sewer AuthorityCommunity Water Supply Mitigation Plan Public Meeting November 2, 2006

  2. Agenda • Impacts to Be Mitigated • Stream Mitigation Plan • Wetland Mitigation Plan • Mitigation Costs • Schedule for Next Steps • Public Comment

  3. Impacts to be Mitigated • The Preferred Water Supply Alternative includes ... • Expand Ragged Mountain Reservoir with New Dam • New Pipeline from South Fork Rivanna Reservoir to Ragged Mountain Reservoir • 9.5 Miles in Length • 36-Inch Pipeline

  4. Impacts to be Mitigated Full presentation includes a picture here of proposed Ragged Mountain Reservoir. The Picture highlights where streams would be impacted. • Streams • 14,435 linear feet of rural upland streams will be inundated • Small, high quality streams, but cut-off from Moores Creek for over 100 years • Overall low impact

  5. Impacts to be Mitigated Full presentation includes a picture here of proposed Ragged Mountain Reservoir. The Picture highlights where wetlands would be impacted. • Wetlands • Inundated wetlands were created by existing reservoirs • 0.81 Acres Forested • 0.07 Acres Shrub-Scrub • 1.73 Acres Emergent • Army COE requires 3.46 Acres Wetland Mitigation

  6. Pipeline Impacts Full presentation includes a picture here of proposed pipeline between South Fork Rivanna Reservoir and Ragged Mountain Reservoir. The Picture highlights where streams and wetlands would be temporarily impacted during construction. • Temporary Impacts • 668 Linear Feet of Streams • 0.04 acres emergent wetlands • No Permanent Impacts – No Off-Site Mitigation Required

  7. Stream Mitigation • Extensive List of Options Reviewed • “Short List” • Restoration and Preservation along Buck Mountain Creek (RWSA-owned land) • Multiple Site Stream Restorations (Moores Creek, Maury Creek, Rivanna River, Ivy Creek Tributaries)

  8. Stream Mitigation • “Short List” Reviewed with Regulatory Agencies • Mitigation must be “Function for Function” (Army COE and US FWS) • Lost Function is Rural, Upland Streams • Buck Mountain Creek Best Functional Match of All Options Available • Multiple Site Option Will Not Be Approved by Army COE

  9. Stream Mitigation • RWSA is proposing Buck Mountain Creek • Details Subject to Regulatory Adjustments • Current Estimates • Assessment of Sufficiency to Mitigate Ragged Mountain Project Impacts • Fully Satisfies Virginia DEQ Criteria • Satisfies Over Two Times the US Army COE Criteria!!

  10. Proposed Stream Mitigation Project Full presentation includes a picture here of proposed Buck Mountain Creek mitigation site. The Picture highlights where stream preservation, enhancement, and restoration elements are proposed.

  11. Wetland Mitigation • Successful wetland restoration requires specialized hydrogeographic conditions • Water drainage volume • Hydric soils • Relatively flat terrain • Due to local conditions, suitable sites limited in number and too small in size • Preference given to Moores Creek Watershed

  12. Wetland Mitigation • RWSA is proposing Franklin Street property adjacent to Charlottesville Stockyard • Property Under Contract for Sale to RWSA – Subject to Completion of RWSA Investigations • Informal Discussions with Regulators Positive • Details of Site Plan Subject to Regulatory Adjustments

  13. Wetland Mitigation • Franklin Street property (continued) • Current Estimates • 4.0 acres in restored (“new”) wetlands • 0.9 acres of existing wetlands preserved • Flood and riparian buffer restored along Moores Creek • Exceeds Requirements of US Army COE (4.0 acres new wetlands vs. 3.46 acres required)

  14. Proposed Wetland Mitigation Project Full presentation includes a picture here of proposed Moores Creek wetland mitigation site. The Picture highlights where existing wetland, proposed wetland, and proposed riparian buffers are planned.

  15. Additional Environmental Benefits • Improved Moormans River Stream Flow • Expanded Lacustrine (Lake) Ecosystem Benefits • New Fringe Wetlands May Emerge • Endangered Species Habitat Area Protected • Watershed Protection • Riparian Improvements Along Moores Creek

  16. Estimated Value of Mitigation

  17. Next Steps • Receive and Evaluate Public Comment • Seek Mitigation Plan Approval by Joint Boards • Submit Plan to Regulatory Agencies • Seek Final Approval of Ragged Mountain Permit • Negotiate Ragged Mountain Land Site Requirements with City • Complete Financial Plan

  18. Community Feedback How Does This Mitigation Plan Meet the Needs of Our Community?

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