Three Rivers Levee Improvement Authority (TRLIA) Briefer: Mary Jane Griego, TRLIA Board Member Three Rivers Levee Improvement Authority March, 2007

What is TRLIA? A Joint Powers Agency comprised of Yuba County and Reclamation District 784 –Created in 2004 to aggressively focus on Flood control improvements in southern Yuba County –Unique Relationship with Development Community –Governed by TRLIA Five Member Board Goals –Achieving at least a 200 year level of flood protection for south Yuba County –Complete the remaining major flood protection elements by 2008 Web site:

Project Overview Accelerated Flood Control Improvements –Goal: Complete by late 2008 –Four phased program underway – 29 miles Approximately 50% done Remaining work to be done in 2007 and 2008 –$133 Million spent to date $78 Million Local Funding $55 Million State Funding –Over $200 Million for remaining work Feather River Setback drives high cost Potential Proposition 1E or 84 funding

Phase 1 (red): Yuba Phase 2 (green): Yuba, Western Pacific Interceptor Canal, and Bear Phase 3 (purple): Bear Setback Phase 4 (blue): Yuba, and Feather River TRLIA Levee Work by Phase

Bear River Setback

Bear River 639 acres of new riparian and upland habitats

Feather Setback Benefits Superior flood protection for South Yuba County –Built to current engineering standards –Built with suitable soils (current levee soil is too sandy) –Removes river choke point and widens floodway –Built away from old river channels –Eliminates significant erosion sites Regional flood protection benefits for south Yuba County and surrounding communities –Widens flood way and lowers water surface levels (1.5 ft for Marysville and Yuba City) –No downstream impacts due to regulated flows Creates up to 1550 acres of habitat for restoration or mitigation banking

Flood Plain Management FEMA Levee Certification Underway TRLIA/Yuba County Interface

Questions