Final Nmrwp Scm Meeting 11 15 05 Mrc
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  • 1. New Meadows Lake Tidal Restoration Feasibility Study November 15, 2005 Steering Committee Meeting Sponsored by: With funding provided by:
  • 2.
    • Study Goal & Objectives To develop and evaluate the feasibility of technical alternatives for improving water quality and enhancing ecological resources in New Meadows Lake through increased tidal exchange.
    • Public Involvement
    • A key component of the study process and any ultimate decision-making process.
    • There will be three public forums during the study.
  • 3. Study Progress
    • Temperature and Stage Data
    • Bathymetry Data
      • Bathymetry
      • Stage-Volume Relation
    • Preliminary Model Development
      • Calibration
      • Conceptual Alternatives
    • Discussion of Conceptual Alternatives
  • 4. Temperature and Stage Data
      • Temperature/Pressure Transducers Installed July 29, 2005
      • Temperature/Pressure Transducers Retrieved October 14, 2005
  • 5. Stage Data
      • Water Surface Elevations (Stage): New Meadows River (blue) and New Meadows Lake (red)
  • 6. Bathymetry Data
    • Complete Bathymetry Mapping of Upper and Lower Lake
    • Data Corrected for Changes in Tidal Stage
    • Data in Maine West 1983 Coordinate Plane
  • 7. Stage-Volume Relation
  • 8. Preliminary Model Development
    • HEC-RAS Model Development
      • Geometry Data From Bathymetry and Existing Information
      • Tidal Stage Data for Input
  • 9. Alternative 1: Deeper Culvert
    • Existing Culvert Alignment and Width with Invert Set 2.4-ft Below Current Invert
    • Lower Typical Lake Level
    • Tidal Stage Variation Does Note Change
  • 10. Alternative 2: Deeper/Wider Culvert
    • Existing Culvert Alignment and Double-Width (24-ft) and Invert Set 4.4-ft Below Current Invert
    • Lower Typical Lake Level
    • Tidal Stage Variation Does Note Change
  • 11. Alternative 4: Bridge Replacing Culvert
    • Bridge Through Embankment
    • Width of 50-ft
    • Invert Set Below MLW
  • 12. Alternative 4: Bridge Replacing Culvert
    • Substantial Tidal Stage Variation
  • 13. Thank you
    • Questions? Comments?