Colorado River Basin - Completed TMDLs

• Alamo River Sedimentation/Siltation TMDL (Approved by USEPA on June 28, 2002)
• New River Pathogen TMDL (Approved by USEPA on August 14, 2002)
• New River Sedimentation/Siltation TMDL (Approved by USEPA on March 31, 2003)
• New River Trash TMDL (Approved by USEPA on September 24, 2007)
• Imperial Valley Drains Sedimentation/Siltation TMDL (Approved by USEPA on September 30, 2005)

• Alamo River Sedimentation/Siltation
  The TMDL was adopted by the Regional Board June 27, 2001, approved by the State Board on February 19, 2002, approved by the Office of Administrative Law on May 3, 2002, and approved by U.S. EPA on June 28, 2002. The following documents are now available: (All are in PDF Format)
  
  
• Appendix A
• Appendix B
• Appendix C
• Appendix D
• Appendix E
• Appendix F
• Appendix G
• Attachment 1
• Attachment 2
• Attachment 3
• Attachment 3A
• Attachment 4
  
• Imperial Valley Drains Sedimentation/Siltation TMDL
  The TMDL was adopted by the Regional Board on January 19, 2005, approved by the State Board on July 21, 2005, approved by the Office of Administrative Law on September 8, 2005, and approved by U.S. EPA on September 30, 2005. The following documents are now available:
  
  
• Quality Assurance Project Plan for the Imperial Valley Drains Sedimentation/Siltation
• TMDL and Implementation Plan Cover Page
  
  
• TMDL Staff Report
• Appendix A
• Appendix B
• Appendix D
• Resolution
• Basin Plan Amendment
• CEQA Checklist and Determination
• Natural Environment Study
• Economic Impact Assessment
• Responses to Public and Peer Review Comments
• Staff Supplemental Report (9/14/04)
• New River Pathogen
  The TMDL was adopted by the Regional Board on October 10, 2001, approved by the State Board on March 21, 2002. It was also approved by the Office of Administrative Law on March 23, 2002, and approved by U.S. EPA on August 14, 2002. The following documents are now available:
  
  
• Attachments
• Appendices
• New River Sedimentation/Siltation
  The TMDL was adopted by the Regional Board on June 26, 2002, approved by the State Board on November 19, 2002, approved by the Office of Administrative Law on January 13, 2003, and approved by U.S. EPA on March 31, 2003. The following documents are now available:
  
  
• Appendix A
• Appendix B
• Appendix C
• Appendix D
• Appendix E
• Appendix F
• Appendix G
• Attachment 1
• Attachment 2
• Attachment 3
• Attachment 4
• Attachment 4 Economic
• New River Trash TMDL
  The TMDL was adopted by the Regional Board on June 21, 2006, approved by the State Board on April 18, 2007, approved by the Office of Administrative Law on August 2, 2007, and approved by U.S. EPA on September 24, 2007. The following documents are now available:
  
  
• Cover Page to Public Review
• Public Review Draft New River Trash TMDL Staff Report
• Appendix A
• Appendix B
• Basin Plan Amendment
• Resolution No. R7-2006-0047
• CEQA Checklist and Discussion
• Natural Environmental Study