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Jason Uhley Chief of Watershed Protection Riverside County Flood Control and Water Conservation District 1.

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Presentation on theme: "Jason Uhley Chief of Watershed Protection Riverside County Flood Control and Water Conservation District 1."— Presentation transcript:

1 Jason Uhley Chief of Watershed Protection Riverside County Flood Control and Water Conservation District 1

2 Federal program to protect the Beneficial Uses of lakes, rivers and streams Clean Water Act Recreation on Canyon Lake Water Supply Warm and Cold Water Habitat Fishing 2

3 Construction Pesticide/Herbicide Use Clean Water Act implemented through National Pollutant Discharge Elimination System (NPDES) Permits Industrial Municipal Separate Storm Sewer System (MS4) De-minimus (dewatering) 3

4 Today discussing MS4 Permit Construction Pesticide/Herbicide Use Industrial De-minimus (dewatering) Municipal Separate Storm Sewer System (MS4) Santa Ana Permit reissued in 2010 Santa Ana Permit reissued in 2010 Issued jointly to cities and County (Permittees) Issued jointly to cities and County (Permittees) Regulates Permittee Activities Regulates Permittee Activities Regulates private Activities Regulates private Activities Residential Residential Business Business Development Development Other governments Other governments 4

5 MS4 Permit requires Cities and County to comply with Lake Elsinore/Canyon Lake Total Maximum Daily Load (TMDL) 5 Riverside County* Beaumont Canyon Lake Hemet Lake Elsinore Menifee* Moreno Valley* Murrieta* Perris Riverside* San Jacinto Wildomar* * Only applies to portions of the City/County within the San Jacinto Watershed

6 Permittee TMDL Compliance Activity Timeline 2001 – San Jacinto Construction Permit – interim new development controls 2002 – Third-term Stormwater Permit Adopted 2004 – TMDL Adopted 2006 – TMDL Task Force Formed 2006 – Final Water Quality Management Plan for New Development 2007 – Stormwater compliance programs enhanced to better address TMDL Fourth-term Stormwater Permit Adopted 2020 – Compliance with TMDL required 6

7 Comprehensive Nutrient Reduction Plan (CNRP) for Lake Elsinore/Canyon Lake TMDL 7 Required by 2010 Permit, due to RWQCB December 31, 2011 Must specify compliance actions and schedule for implementation Allows for adaptive management Allows Permittees to plan and budget Requires RWQCB approval Alternative: Direct liability for TMDL targets Substantive fines and penalties for non-compliance

8 VOLUME: The impediment to compliance Scenario 1: Typical Storm Typical BMP Design Event 0.5”/day rainfall 8 83,000 acres of urbanized area (17% of total watershed area) ~90% urban area untreated May need 700 acres set aside for treatment (across urban area) $177 Million capital cost + O&M

9 VOLUME: The impediment to compliance Scenario 2: The “BIG” Storm 9 January 1993 – 10”/10 days December 2010 – 7”/ 8 days Peak rainfall 3”/day Minimum 4,000 acres set aside within urban area for treatment Equivalent to a “NEW” Lake Elsinore Billion dollar solution + O&M Needed once every 20 years

10 CNRP Proposal – Identify and Implement Feasible Watershed Based Controls Illegal Discharge Investigations Urban Retrofit Projects Education/Outreach Business Inspection Programs New Development Controls 10 Street Sweeping

11 Alternative Option: In-Lake Treatment 11 Aeration/Oxygenation Water Column Mixing Fishery Management Chemical Addition

12 12 BMPCapital Costs (estimated) Annual Operation Costs (estimated) Lake Elsinore Aeration, Mixing, Fish Management N/A$500,000 Hypolimnetic Oxygenation System $2-4 million$250,000 Lake Water AdditionN/A$1,500,000 Chemical Nutrient BindersN/A$300,000 In-Lake Solutions = Greater Cost/Benefit Watershed BMPs only: $1 Billion (?) $ millions (?)

13 In-Lake Solutions 13 Pros Potentially order of magnitude less expensive Multiple Cost-Share Partners Treat extreme events over time Cons Requires Regional Board approval Will still need watershed controls May require enhancements

14 Consider other pollutant trading options 14 Agricultural land fallowing / MSHCP conservation Septic system to sewer conversions Other pollutant trading opportunities

15 Next Steps 15 CNRP Development – Due to RWQCB December 31, 2011 District coordinating draft with City / County staff City staff providing data on existing and proposed BMPs TMDL Task Force providing data on in-lake solutions Review draft with City Managers in November


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