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MA 09 - City of Sacramento - American R left bank
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Location City, County, and State of the levee system. Determined by the levee alignment location not the leveed area.
Sacramento, Sacramento County, California
System ID Unique identifier code for the levee system using 10 or 12 numbers in length.
5205000441
Operation and Maintenance Organization Entity responsible for day-to-day management of the levee.
Sacramento Maintenance Yard - DWRCentral Valley Flood Protection BoardSacramento Area Flood Control AgencyCA Department of Water ResourcesSacramento Maintenance Yard - DWRCentral Valley Flood Protection BoardCA Department of Water ResourcesSacramento Area Flood Control AgencyCentral Valley Flood Protection BoardAmerican River Flood Control DistrictCA Department of Water ResourcesCentral Valley Flood Protection BoardAmerican River Flood Control DistrictSacramento Area Flood Control AgencyCA Department of Water ResourcesCentral Valley Flood Protection BoardAmerican River Flood Control DistrictSacramento Area Flood Control AgencyCA Department of Water ResourcesSacramento Area Flood Control AgencyCentral Valley Flood Protection BoardCity of SacramentoCA Department of Water Resources
Floodplain Management Entities responsible for regulating activities that occur in areas prone to flooding.
FEMA Region 9
Oversight Organization Entity responsible for oversight of the levee and ensuring it is maintained.
USACE - Sacramento District
Last Assesment Date Last Risk Assessment or Formal Inspection.
12/14/2018
Data Last Updated Date any of this information for the system has been updated.
1/29/2024
Levee Length Combine length of all the levee system features including the embankments, floodwalls, closures where they exist for this system.
Levee Length Graphic 36.432 Miles
Average Levee Height The average height of the levee system. The levee profile viewer on the mapping window will show the actual levee height values for the length of the levee if available.
Levee Height Graphic 13 Feet
Year Levee Constructed Year levee system was fully completed as a flood reduction project.
Timeline Graphic 2010
Summary General text description of the levee system with a summary of why the levee is there, and the benefits it provides.
Maintenance Area 09 (MA09) – City of Sacramento, American River Left Bank levee system is roughly 35 miles long and located within Sacramento County, California and runs through the City of Sacramento. The levee begins on the southern bank of the American River near Riviera Park in Rancho Cordova. The levee follows the southern bank of the American River as it flows west to where the American River meets the Sacramento River, at Tiscornia Park in Sacramento. The levee continues along the eastern bank of the Sacramento River and ends near the intersection of Randall Island Road and River Road in Courtland. The majority of the levee is made of soil and portions of the levee have concrete floodwalls that raise the height of the levee, closure structures that can be opened and closed to stop the flow of water through the levee, and pump stations that pump water to the outside of the leveed area. The levee was constructed in multiple segments prior to 1955 in order to reduce the risk of flooding from the American and Sacramento Rivers. The levee has undergone multiple reconstructions and repairs, as recently as 2001. There are a number of highly populated and historic areas located behind the levee, including the California State Capitol building, numerous local, state, and federal government offices, and the historic district of Old Sacramento in downtown Sacramento, located near the confluence of the American and Sacramento Rivers. Old Sacramento covers 28 acres and includes historic buildings, bridges, and railroad line. The I Street and Tower Bridges, the California Railroad Museum and its associated railroad tracks are a few of the structures listed on the U.S. National Register of Historic Places in this area. There is at least one ship wreck within the Sacramento River listed on the U.S. National Registry. In some cases, these historic structures are located either on the top or sides of the levee. Other areas protected by this levee are East Sacramento, a portion of South Sacramento, Pocket and Meadowview, and a portion of the City of Elk Grove. Three major freeways cross through the protected area: Highway 50, Interstate 5, and Highway 99. Highway 50 oriented east-west, Interstate 5 oriented north-south, and Highway 99 oriented north south. The southernmost portion of the levee (roughly 8 miles of levee) is mostly agricultural land. The section of levee along the American River is operated and maintained by the American River Flood Control District (ARFCD), the levee along the Sacramento River north of Sutterville Road is operated and maintained by City of Sacramento and, the levee along the Sacramento River south of Sutterville Road is operated and maintained by the State of California Department of Water Resources. The owner of the levee is the Central Valley Flood Protection Board (CVFPB).
Performance & Condition General text description of the historical and anticipated performance of the levee, the people and property benefitting from the levee and who may be at risk of flooding, and actions to address areas of concern.
Active levee upgrades are in progress on this levee, and this summary may not reflect current conditions. No levee can completely reduce the risk of flooding. This levee is considered very high risk based on the likelihood of the levee failing and the consequences to the people and property if it were to fail. Major rainstorms took place along the levee in 1907, 1955, 1986, 1995, 1997, 1998, 2006, and 2008. The levee overtopped in 1986 at the Howe Avenue bridge, which resulted in the installation of a closure structure at this location. A portion along the Sacramento River near Sutterville Road breached, or broke open, in 1907. The levee is prone to heavy seepage (water leaking through the levee soils) and erosion, or deterioration, of the levee slopes during floods. These issues are expected to continue the next time water in the river rises near the top of the levee. Storms in this area of California occur frequently during rainy season and flooding is likely to cause water to rise over the levee and into the leveed area behind it. There are many areas on the levee where large trees, utility poles, animal burrows, and pipes have weakened the levee. These conditions put the system at high risk for seepage and possible levee failure. The risk is heightened when the flood water rises on high on the levee for long periods of time. If the levee were to fail, the results could be catastrophic to the people and property behind the levee. Exit routes to the west and south may flood, because roads behind the levee are relatively low in elevation. The quickest exit routes would be to the east of the leveed area, towards high ground. The City and County of Sacramento both have detailed and up-to-date Emergency Operations and Evacuation Plans. The community awareness of the risk of flooding behind the levee is high. The City and County of Sacramento both have reverse 911 system, warning sirens, and procedures for informing local TV and radio stations during emergencies. Monitor the river conditions and stay alert to the risk of a flood.
Flooding Hazard
Historic Loading by Percentage of Height
Info Bubble Representative loading associated with historical flood information as a percentage of the levee height or overtopping.
Loading by Percentage of Heigth Graphic Background 0 Occurrences 2 Occurrences 3 Occurrences 3 Occurrences