Burns Watershed Planning And Regulation


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The Practice and Potential of Ecosystem-Based Management
Applying lessons from land use and coastal management in Maine hosted byWells National Estuarine Research Reserve,
Maine Coastal Program, Maine Sea Grant,the University of New England, and the Ecosystem-based Management Tools Network

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Burns Watershed Planning And Regulation

  1. 1. Streams, Watersheds and Land Use Regulation Community Development Department York, Maine
  2. 2. Streams, Watersheds and Land Use Regulation <ul><li>Impervious Surfaces Policy </li></ul><ul><li>Impervious Science </li></ul><ul><li>Ecosystem-Based Management </li></ul>York Community Development Department
  3. 3. Impervious Surfaces <ul><li>It all started innocently enough… </li></ul><ul><ul><li>A proposal to overhaul the Zoning provisions dealing with impervious surfaces in October 2005 </li></ul></ul><ul><ul><li>A new Natural Resources Chapter for the Comprehensive Plan in May 2006 </li></ul></ul><ul><ul><li>A goal about protecting water quality in June 2006 </li></ul></ul>York Community Development Department
  4. 4. <ul><li>Why regulate impervious surfaces? </li></ul><ul><ul><li>Main Reason: </li></ul></ul><ul><ul><ul><li>impervious surfaces are a primary determinant of surface water quality </li></ul></ul></ul><ul><ul><li>Secondary Reasons: </li></ul></ul><ul><ul><ul><li>Relationship to storm water volumes and flooding </li></ul></ul></ul><ul><ul><ul><li>Relationship to retaining open spaces </li></ul></ul></ul>York Community Development Department
  5. 5. York Community Development Department
  6. 6. <ul><li>Why change our requirements? </li></ul><ul><ul><li>Inconsistent use of terms </li></ul></ul><ul><ul><li>Inconsistent application of standards </li></ul></ul>York Community Development Department
  7. 7. <ul><li>Inconsistent Use of Terms: </li></ul><ul><ul><li>“ lot coverage” </li></ul></ul><ul><ul><li>“ maximum coverage” </li></ul></ul><ul><ul><li>“ foundation coverage” </li></ul></ul><ul><ul><li>“ coverage” </li></ul></ul><ul><ul><li>“ impervious surface” </li></ul></ul><ul><ul><li>“ impervious surface ratio” </li></ul></ul>York Community Development Department
  8. 8. <ul><li>Inconsistent Application of Standards: </li></ul><ul><ul><li>In some zones, impervious surfaces are regulated the same way for every use </li></ul></ul><ul><ul><li>In some zones, impervious surfaces are not regulated at all for residential uses </li></ul></ul><ul><ul><li>In some zones, the calculation of impervious surface differs for residential and non-residential uses </li></ul></ul><ul><ul><li>In the Shoreland Overlay District, impervious surfaces are defined differently than in the base zones </li></ul></ul>York Community Development Department
  9. 9. <ul><li>Conceptual proposal rejected… </li></ul><ul><ul><li>No relationship between proposed standards and science </li></ul></ul><ul><ul><li>Directed by the Board of Selectmen to go back to the drawing board, and to return with a science-based approach </li></ul></ul>York Community Development Department
  10. 10. Impervious Science <ul><li>What does a scientific approach require? </li></ul><ul><li>We relied heavily on work by the Center for Watershed Protection </li></ul><ul><li>CWP.ORG </li></ul><ul><li>Our bible: Rapid Watershed Planning Handbook: A Comprehensive Guide for Managing Urbanizing Watersheds (2001) </li></ul>York Community Development Department
  11. 11. <ul><li>Impervious surfaces should be evaluated at the second order watershed level </li></ul><ul><li>Starting point is to generate a 2 nd order watershed map of York </li></ul><ul><ul><li>Had recently obtained 2’ contour data </li></ul></ul><ul><ul><li>Needed to generate new stream layer based on contours </li></ul></ul><ul><ul><li>Needed to generate watersheds layer based on streams and contours </li></ul></ul>York Community Development Department
  12. 12. <ul><li>Why the quad sheets don’t cut it any more… </li></ul><ul><li>York Beach Quadrangle: </li></ul><ul><ul><li>Prepared in 1956 </li></ul></ul><ul><ul><li>Photorevised in 1973 – 35 years ago </li></ul></ul><ul><ul><li>Scale of 1:24,000 </li></ul></ul><ul><ul><li>20’ contours </li></ul></ul><ul><li>York’s GIS </li></ul><ul><ul><li>Based on current (1998 -2005) aerial photography </li></ul></ul><ul><ul><li>6” resolution </li></ul></ul><ul><ul><li>2’ contours </li></ul></ul>York Community Development Department
  13. 13. Quad or Local Mapping? <ul><li>York Beach Quad Sample </li></ul><ul><li>York GIS Sample </li></ul>York Community Development Department
  14. 14. York Community Development Department
  15. 15. York Community Development Department
  16. 16. York Community Development Department
  17. 17. York Community Development Department
  18. 18. <ul><li>As we proofed our initial work, we found some significant flaws </li></ul><ul><li>We have contracted with Tom Burns to take our streams and watersheds work to the next level </li></ul><ul><ul><li>One big gap – missing the storm water system </li></ul></ul><ul><ul><li>Second problem – using GIS software to generate watersheds without understanding the implications of the program settings </li></ul></ul>York Community Development Department
  19. 19. Ecosystem-Based Management <ul><li>The State of Michigan defines this as: “a process that integrates biological, social and economic factors into a comprehensive strategy aimed at protecting and enhancing sustainability, diversity and productivity of our natural resources.” </li></ul>York Community Development Department
  20. 20. Ecosystem-Based Management? York Community Development Department Water Quality Testing Upstream Septic Education & Enforcement New Watersheds Mapping New Streams Mapping Impervious Surfaces Analysis Storm Water Management Plan New 2’ Elevation Contour Data New Storm Water Management Policies Shoreland Zoning Revisions Update the Buildout Study Joint Purchase of Regional Aerial Photography Riparian Corridors Analysis & Report Revise Impervious Surface Regulation Storm Water System Mapping Water Quality Testing at Beaches
  21. 21. <ul><li>Stephen Burns, Community Development Director </li></ul><ul><li>Town of York, Maine </li></ul><ul><li>363-1007 </li></ul><ul><li>[email_address] </li></ul>York Community Development Department