April 2006 Flood Near Highway 132

April 2006 Flood

March 2011 Flood

1997 flood near Highway 132

Dept. of Water Resources sandbags a levee during a flood event.

About Us

The Mid San Joaquin River Regional Flood Management Plan (MSJR RFMP) was first developed in 2013-2014, and was updated in 2017, through the participation of a range of stakeholders primarily from Stanislaus County. This regional planning effort was created to give stakeholders the opportunity to -develop a plan to reduce flood risks in the area from the confluence of the Merced and the San Joaquin Rivers to the confluence of the Stanislaus and the San Joaquin Rivers. The result of these efforts is a vision for a safer and more flood-resilient region that identifies challenges and opportunities for flood management and a prioritized list of actions for DWR to consider in their Central Valley Flood Protection  Plan (CVFPP).  The MSJR RFMP also identifies priority flood protection projects to be carried out by local sponsors. Millions of dollars have been raised by local sponsors from a variety of state, federal and other sources to make these projects a reality.

The second Update of the MSJR RFMP is now underway and will continue throughout 2021. Through this locally-driven process, stakeholders have an opportunity to identify new flood management opportunities in the region, ranging from measures appropriate on agricultural lands to actions designed for more developed areas. Participants will include local, state and federal government agencies, flood control agencies, irrigation districts, reclamation districts, levee maintenance districts, agricultural interests, landowners, community groups, as well as recreation and environmental interests.

Planning Area Map

The Mid San Joaquin River  region extends from the Merced-San Joaquin River confluence to the Stanislaus-San Joaquin River confluence. Specifically, any areas protected by the State Plan of Flood Control facilities, and any other areas experiencing flood issues that have a nexus to these facilities, are eligible for inclusion in the MSJR RFMP.

More info here.

Climate Resilience Workshop #1

Mid San Joaquin RFMP Climate Resilience Workshop #1 was held June 8th from 3 to 5 PM. The video of the presentation can be found here. The video is password-protected.

Stakeholder Meeting #1

On Friday, April 2, we held the first quarterly stakeholder meeting of the MSJR RFMP Update. We introduced the RFMP Update process, heard from stakeholders about their interests and priorities for flood management and ecosystem restoration in the Mid San Joaquin River region, and laid the groundwork for quarterly meetings over the next two years. The video of the presentation can be found here and the slides presented may be found here.

DWR Flood-MAR Webinar

On March 11, the Mid San Joaquin RFMP hosted a webinar by DWR’s Flood-MAR (Managed Aquifer Recharge) staff describing the pilot study that DWR has conducted on the feasibility of Flood-MAR in the Merced River watershed. The study focused on assessing the flood management, groundwater recharge, and ecosystem enhancement benefits of diverting flood flows, using existing infrastructure, to areas in the watershed that are suitable for groundwater infiltration. DWR will be conducting additional analyses this spring of the potential further benefits available from new infrastructure investments and from forecast-informed reservoir operations at Lake McClure, as well as continuing to assemble analytical tools for a potential study of Flood-MAR in the Tuolumne watershed. The video of the March 11 presentation is here and copies of the slides are here and here.


We’re happy to announce that the 2nd Update of the Mid-San Joaquin River Regional Flood Management Plan (MSJR RFMP) is underway!

As in 2017, RD 2092 and Stanislaus County will be leading the collaboration with MSJR stakeholders to develop the RFMP updates. We will further define a safer and more flood-resilient vision for the  MSJR Region, articulating strategies and projects that are both practical and ambitious in reshaping the flood management status quo in response to important drivers of change in the MSJR Region. We will also identify locally-sponsored strategies and projects to make best use of the region’s river corridors and floodplains to meet multiple objectives for flood management, habitat restoration, groundwater recharge, recreational access, and environmental justice. Our successful 2014 plan and 2017 update have already catalyzed support for 12 RFMP projects and over $30 million in state and federal investment in multi-benefit flood system improvements in Stanislaus County.

Among the major tasks of the RFMP update, we aim to:

  • Update the status of projects identified in the 2017 RFMP
  • Identify new projects consistent with regional flood management goals and state policies
  • Identify ways to improve regional coordination of flood management
  • Identify ways to improve regional resilience to evolving flood hazards
  • Update regional finance plan
  • Support stakeholders in seeking grant funding for RFMP Projects where possible
  • Identify ways to facilitate permitting of multi-benefit flood projects

We will begin outreach to MSJR stakeholders this fall, and will continue regular stakeholder engagement throughout 2021. Once completed, the updated MSJR RFMP will be incorporated into the 2022 Update of the Central Valley Flood Protection Plan, the State of California’s primary policy-setting document for Central Valley flood management. The RFMP will also serve to promote and coordinate ongoing local and regional flood management activities within the region. These may include project development, financing, maintenance, and other critical objectives.
We look forward to working with all  MSJR stakeholders in crafting a collaborative and innovative RFMP. If you have questions or comments, please don’t hesitate to email us at midsjr@esassoc.com.