The Chollas Creek Dissolved Metals Total Maximum Daily Load (TMDL) Stakeholders Meeting page serves as a resource for interested community members, agencies and other stakeholders. Stakeholder meetings are designed to provide activity updates on planned and implemented projects and answer stakeholder questions.
Materials from previous Stakeholder Meetings are available for review below:
2012 Meeting Agenda Chollas Metals TMDL Background & And Progress Presentation Monitoring Results Memorial Park Infiltration Basin Chollas Creek Best Management Practices Retrofit Project for Caltrans Navy's Storm Water Best Management Practices Model and Nationwide Low Impact Development Policy La Mesa Source Control Projects, Allsion Ave. and University Ave. Green Streets Overview of Bacteria TMDL 2011 Stakeholder Meeting Summary 2011 Meeting Agenda Chollas Metals TMDL Background & And Progress Presentation Copper Brake Pad Law Presentation Memorial Park Infiltration System Project Presentation Chollas Creek Runoff Reduction & Groundwater Recharge Presentation Naval Base San Diego - TMDL Implementation Presentation Chollas Creek TMDL Monitoring 2010-2011 Update Presentation 2010 Stakeholder Meeting Summary 2010 Meeting Agenda Chollas Creek TMDL and Special Studies Monitoring 2009-2010 (DRAFT REPORT) TMDL Dischargers Current Projects Update Water Effects Ratio Study (City of San Diego) Code Modification, Commercial Self-Certification, and BMP Study (City of La Mesa) Treatment BMP Implementation (CalTrans) MS4 Management and Copper/Zinc Reduction (United States Navy)For additional information regarding the Chollas Creek TMDL Stakeholder's Meeting, please contact Tim Graham at tgraham@sandiego.gov.
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Caltrans |
City of La Mesa |
City of Lemon Grove |
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City of San Diego |
County of San Diego |
Port of San Diego |
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United States Navy |
Chollas Creek TMDL Source Loading, Best Management Practices, and Monitoring Strategy Assessment - Final Report, September, 2006 May 12, 2005 - City of San Diego letter regarding metals TMDL and CEQA analysis January 6, 2006 - City of San Diego letter regarding metals TMDL and CEQA analysis September 26, 2006 - City of San Diego letter regarding metals TMDL and CEQA analysis April 9, 2007 - City of San Diego letter regarding metals TMDL and CEQA analysis May 29, 2007 - City of San Diego letter regarding metals TMDL and CEQA analysis May 18, 2009 March 30, 2009 December 15, 2008 October 6, 2008 The Chollas Creek Watershed is located south and east of downtown San Diego in a highly urbanized portion of San Diego County. The watershed drains approximately 30 square miles via two main tributaries, the North Fork and the South Fork, and discharges into San Diego Bay. Except for the downstream 1.2 mile tidal prism area, Chollas Creek is an ephemeral stream which usually only flows during rainy conditions. The map below highlights the Chollas Creek Watershed boundaries, jurisdictional boundaries of the responsible agencies, and the City of San Diego's community plan areas.
A TMDL is a "pollution budget" for an impaired waterbody, such as Chollas Creek. A TMDL defines the maximum amount of a pollutant the waterbody can safely receive while meeting the water quality objectives identified in the San Diego Basin Plan. There are four adopted TMDLs for Chollas Creek: the pesticide (diazinon) TMDL, the dissolved metals TMDL (for copper, lead and zinc). In addition, a draft TMDL for indicator bacteria is currently being revised. This Implementation Plan is designed to meet the requirements of the metals and bacteria TMDLs over the 20 year allowed implementation period. The Implementation Plan uses an integrated approach to achieve this goal.
