Industrial Stormwater General Permit Modifications by P97o75wv

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									     Regulatory Developments
 Affecting Southwest Washington

Land Use in Southwestern Washington
      Law Seminars International
            Vancouver, WA
           February 11, 2008

           Bill Moore P.E.
        Department of Ecology
     Regulatory Developments
 Affecting Southwest Washington

 Water Supply – Water Rights and In-stream
  Flows
 Climate Change
 Federal Clean Water Act and Water Quality
                 Water Supply

   Working with Lower Columbia Fish Recovery
    Board
      Local elected officials and key stakeholder groups
      Adopted watershed plans under RCW 90.82
   Set numeric flows in rivers, protect tributaries
   Water for Growth will need to come from deep
    aquifers
               Climate Change

   Significant implications for ESA and CWA compliance
   Will stress the system for fish recovery, temperature
    and stream flows
   Likely see reduced snow pack, lower stream flows
    and higher temp in late summer and fall
   Potential for more intense storms and flooding
          Water Quality

 §401 Water Quality Certifications
 §303(d) listed waters and Total Maximum
  Daily Loads (TMDLs)
 Waste Water Discharge Permits
      Water Quality - Permits

 Industrial Stormwater General Permit
 Construction Stormwater General Permit
 Municipal Stormwater Permits – Issued
  January 2007
     Phase I
     Phase II
    Municipal Stormwater
           Permits

Phase I –
   All of Unincorporated Clark County
Phase II –
   Cities of Kelso, Longview, Battleground,
    Vancouver, Camas and Washougal
   Areas of Unincorporated Cowlitz County
    around Longview and Kelso
    Municipal Stormwater
           Permits

The Permits regulate discharges
 from municipal separate storm
 sewer systems by requiring the
 control of discharges into
 municipal separate storm sewer
 systems.
     Municipal Stormwater
            Permits

Adoption of Local Ordinances - Timing
   Phase I (Unincorporated Clark County) – August 2008
   Phase II (All others) – August 2009
Local Ordinances – Content
   Prohibit non-stormwater discharges into the storm sewer
   Control construction site stormwater runoff
   Stormwater runoff from new development and re-development
       Municipal Stormwater
              Permits

New Development & Re-Development –
  biggest issue: Flow Control
   Objective is to protect and restore stream hydrology
   Require post-development runoff rates match pre-
    developed runoff rates using hydrology model (WWHM)
   Larger stormwater ponds
   Flexibility in meeting the flow control objective – low
    impact development (LID) techniques, regional facilities,
    regionally calibrated model(s)
  Municipal Stormwater
         Permits
Municipal Stormwater Permit Appeals
 Permits are in effect
 Significant permit appeal issues
   Re-development flow control standard
   Low impact development requirements
   One acre threshold in the phase II permit
   Geographic scope of the phase II permit
     Regulatory Developments
 Affecting Southwest Washington

Land Use in Southwestern Washington
      Law Seminars International
            Vancouver, WA
           February 11, 2008

           Bill Moore P.E.
        Department of Ecology

								
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