We annually inspect the State-federal portions of the flood management system within California's Central Valley. We develop a summary report documenting the results of these annual levee, channel, and structure inspections, as well as other activities. We also create detailed inspection reports documenting the deficiencies found in each Local Maintaining Agency (LMA), which are used by the U.S. Army Corps of Engineers (USACE), DWR, the Central Valley Flood Protection Board (CVFPB), and other interested parties.
We are responsible for developing and administering a program to facilitate Local Maintaining Agency (LMA) reporting requirements. LMAs are required to report to us specific information related to the project levees by September 30 of each year. We consolidate this information and provides an Annual Report to the Central Valley Flood Protection Board (CVFPB) by December 31 of each year. The Annual Report is a summary of information collected from LMAs responsible for the operation and maintenance of the 1,600 miles of project levees in the State-federal flood protection system.
We developed a web-based information management system to supports the collection, compilation, evaluation, and reporting of this information. The web-based system is used by LMA representatives and our staff to develop Annual Reports. Annual Reports can be downloaded from our website.
Our inspectors also conduct regulatory inspections of construction projects requiring encroachment permits from the CVFPB, assist the CVFPB in enforcement issues, conduct investigations as needed, and act as flood fight specialists during a flood emergency.
Each year we conduct a Supplemental Waterside Erosion Survey of the San Joaquin River Flood Control System to document and monitor erosion sites. During the survey we:
- Inspect the waterside levee for erosion activity
- Document and report new erosion sites
- Document and report the current condition of previously identified erosion sites, and
- Rank the severity of erosion sites based upon the findings from the field survey.
Levee penetrations are recognized as hazard elements that affect the integrity of State Plan of Flood Control levees. Heavily corroded, leaking, collapsed, or otherwise compromised pipes affect the structural integrity of levee embankment by creating mechanisms of internal erosion. Identifying the precise location of these crossings and documenting their external conditions provides important information for assessing levee vulnerabilities.We manage a system-wide dataset of pipes and other conduits that cross the 1,600 miles of the State Plan of Flood Control system. The data collected will help us implement a strategic plan to address failing pipe penetrations in the flood management system.
The Levee Log Program surveys the State Plan Flood Control (SPFC). The survey teams identify features within the levee prism and existing right-of-way, categorizes and locates these features using a global positioning system (GPS). The location of these features benefits us and our partners during a potential flood event by identifying:
- Encroachments that may be detrimental to the levee
- Areas that may be inaccessible.
- Ramps, gates, and turnouts for heavy equipment access.
Publications And Reports
- DWR Solicits Proposals from Local Maintaining Agencies Seeking Financial Assistance
- 30-day Comment Period Opens for Addendum 1 to Delta Levees Maintenance Subventions Guidelines
- Watershed University Lower San Joaquin Levee District
- Pyramid Lake Algal Bloom at "Danger" Level
- Perris Dam Seismic Retrofit Enters Second Phase: Construction Begins on Outlet Tower Structure