20260116
08502400
FALSE
1.0
ISO 19139 Metadata Implementation Specification
LFPZ_2021_updated_20210413
-252762.989500
-15061.837900
-148686.927600
254189.110000
1
1.367
002
Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
NAD_1983_California_Teale_Albers
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20260115
14130100
20260115
14130100
ISO19139
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dataset
Christina Kuo
California Department of Water Resources- Division of Flood Management- Floodplain Risk Management Branch
Senior Engineer, Water Resources / Program Manager
lfpz@water.ca.gov
3464 El Camino Ave Suite 200
Sacramento
CA
95821
USA
1-877-769-7475
8:00a.m. to 5:00p.m. PST Monday through Friday
Best to contact via email
20260115
1.367
File Geodatabase Feature Class
withheld
Local Area Network
Christina Kuo
California Department of Water Resources- Division of Flood Management- Floodplain Risk Management Branch
Senior Engineer, Water Resources / Program Manager
lfpz@water.ca.gov
3464 El Camino Ave Suite 200
Sacramento
CA
95821
USA
1-877-769-7475
8:00a.m. to 5:00p.m. Monday through Friday
Best to contact via email
none
Private parties must formally request access to the LFPZ data by completing a LFPZ Data Request/ Release Agreement form. This form can be obtained by emailing lfpz@water.ca.gov.
1-2 weeks typically
<div style="text-align:Left;"><div><div><p style="margin:7 0;">The Levee Flood Protection Zone (LFPZ) maps were developed by the State of California Department of Water Resources as required by Water Code Section 9130 to increase awareness of flood risks associated with State-Federal levees. The maps should not be confused with Federal Emergency Management Agency's Flood Insurance Rate Maps used for the National Flood Insurance Program. They are not showing the same type of flood hazard and they were prepared for different purposes. Levee Flood Protection Zone maps estimate the maximum area that may be flooded if a State-Federal levee fails with flows at maximum capacity that may reasonably be conveyed. These maps specifically focus on flood risks associated with State-Federal levees. Lands within the Levee Flood Protection Zone may also be subject to flooding due to other factors including, but not limited to, levee failure at flows less than design capacity, overtopping of a levee, drainage problems, or other types of flooding from sources on the land side of the levee. Lands not mapped within a Levee Flood Protection Zone may also be subject to flood risk.</p><p style="margin:7 0;"><span>This polygon dataset represents the areas protected by State Plan of Flood Control (SPFC) levees.</span></p><p> </p></div></div></div>
LFPZ_2021_corrected_04-13-21
2009-08-05T00:00:00
2013-06-04T00:00:00
2013
Christina Kuo
California Department of Water Resources- Division of Flood Management- Floodplain Risk Management Branch
Senior Engineer, Water Resources / Program Manager
lfpz@water.ca.gov
3464 El Camino Ave Suite 200
Sacramento
CA
95821
USA
1-877-769-7475
8:00a.m. to 5:00p.m. PST Monday through Friday
Best to contact via email
-122.972787
-120.168765
40.303548
36.644807
1
Christina Kuo
California Department of Water Resources- Division of Flood Management- Floodplain Risk Management Branch
Senior Engineer, Water Resources / Program Manager
lfpz@water.ca.gov
3464 El Camino Ave Suite 200
Sacramento
CA
95821
USA
1-877-769-7475
http://gis.lfpz.water.ca.gov/lfpz/
LFPZ Map Web Viewer
The LFPZ Map Web Viewer allows users to enter a property address or APN to determine whether it is in the LFPZ.
8:00a.m. to 5:00p.m. PST Monday through Friday
Best to contact via email
Levee Flood Protection Zones
LFPZ
Flood Risk Notification Program
FRN
Division of Flood Management
DFM
California Department of Water Resources
DWR
Levee Flood Protection Zones
LFPZ
Flood Risk Notification Program
FRN
Division of Flood Management
DFM
California Department of Water Resources
DWR
A law passed in 2007, Water Code Section 9130, requires the Department of Water Resources (DWR) to prepare Levee Flood Protection Zone (LFPZ) maps by December 31, 2008; the maps shall, using the best available information, identify the areas where flood levels would be more than three feet deep if a project levee were to fail. DWR used information from several sources currently available, including FEMA floodplain maps, FEMA Q3 data, USACE's 2002 Sacramento and San Joaquin River Basins Comprehensive Study, and local project-levee studies. The law also states that DWR may periodically revise the maps to include updated information when that information becomes available. DWR is implementing an aggressive multi-year program to evaluate and delineate detailed floodplains for many of the areas protected by project levees. This effort includes new topography, hydrology, hydraulic models, and floodplain maps. This information will be used to update the initial LFPZ maps. Under Water Code section 9110(b), "Levee Flood Protection Zone" means the area, as determined by the Central Valley Flood Protection Board or DWR, that is protected by a project levee. DWR delineated the LFPZs by estimating the maximum area that may be flooded if a project levee fails with flows at maximum capacity that may reasonably be conveyed. The maps should not be confused with Federal Emergency Management Agency's Flood Insurance Rate Maps used for the National Flood Insurance Program. They were prepared for different purposes and do not show the same type of flood hazard.
This polygon dataset was created to define the areas protected by State Plan of Flood Control (SPFC) levees. DWR is required by law to mail out annual written notices to owners of properties located within the LFPZs. This dataset was created by various methods which are described in the Technical Memorandums developed by the consultants who helped DWR develop the dataset.
California Department of Water Resources, with consulting services from HDR, RBF, CH2M-Hill, Wood Rodgers, and Atkins (formerly PBS&J). Adjustments made to the initial datasets made by the Flood Risk Assessment and Mitigation Office staff.
Levee Flood Protection Zones estimate the maximum area that may be inundated if a project levee fails when the water surface elevation is at the top of a project levee. Zones depicted in this dataset were created utilizing methods and assumptions described in the accompanying technical manual, and do not necessarily depict areas likely to be protected from flow events for which project levees were designed.
Lands within the Levee Flood Protection Zones may be subject to flooding due to various factors, including the failure or overtopping of project or non-project levees, flows that exceed the design capacity of project or non-project levees, and flows from water sources not specifically protected against by project levees. Lands not mapped within a Levee Flood Protection Zone are not invulnerable to flood risk, and some may also experience flooding from these or other processes. The California Department of Water Resources (DWR) makes no warranties, representations or guarantees, either expressed or implied, as to the completeness, accuracy or correctness of the levee flood protection zone (LFPZ) data, nor accepts or assumes any liability arising from or for any incorrect, incomplete or misleading LFPZ data provided pursuant to this request. LFPZ data may change with time. The current version of the LFPZ data contains the best data that was available at the time of data collection. Users should be aware that newer and more accurate data may exist and may not be reflected in the current version of the LFPZ data.
Private parties must formally request access to the LFPZ data by completing a LFPZ Data Request/ Release Agreement form. This form can be obtained by emailing lfpz@water.ca.gov.
Esri ArcGIS 13.6.0.59527
Levee Flood Protection Zones estimate the maximum area that may be inundated if a project levee fails when the water surface elevation is at the top of a project levee. Zones depicted in this dataset were created utilizing methods and assumptions described in the accompanying technical manual, and do not necessarily depict areas likely to be protected from flow events for which project levees were designed.
Lands within the Levee Flood Protection Zones may be subject to flooding due to various factors, including the failure or overtopping of project or non-project levees, flows that exceed the design capacity of project or non-project levees, and flows from water sources not specifically protected against by project levees. Lands not mapped within a Levee Flood Protection Zone are not invulnerable to flood risk, and some may also experience flooding from these or other processes.
The California Department of Water Resources (DWR) makes no warranties, representations or guarantees, either expressed or implied, as to the completeness, accuracy or correctness of the levee flood protection zone (LFPZ) data, nor accepts or assumes any liability arising from or for any incorrect, incomplete or misleading LFPZ data provided pursuant to this request. LFPZ data may change with time. The current version of the LFPZ data contains the best data that was available at the time of data collection. Users should be aware that newer and more accurate data may exist and may not be reflected in the current version of the LFPZ data.
LFPZ polygons were created according to the methodology described in the accompanying technical memorandums produced by each of the consultants for DWR. These technical memorandums can be obtained by sending an email request to lfpz@water.ca.gov.
Levee elevation information was based upon part of a prototype project to validate a National Levee Database (NLD) data model developed by the U.S. Army Corps of Engineers (USACE) Product Delivery Team (PDT).
USGS 10-meter Digital Elevation Model (DEM) and USGS 7.5-Minute Quadrangle Topographic Maps were used to estimate ground elevations.
Sacramento and San Joaquin River Basins Comprehensive Study, US Army Corps of Engineers, 2002 was used as a reference and to compare the extents of the floodplains with the LFPZs.
FEMA Flood Insurance Studies were used as references and to compare the extents of the flood zones with the LFPZs.
The USGS 10-meter Digital Elevation Model (DEM) was used to estimate ground elevations. The accuracy of this DEM is approximately half the contour interval; thus the accuracy is + 3 feet for areas with 5-foot contours, and less accurate in areas with a greater (e.g. 10-foot) contour interval. Horizontal accuracy is + 40 feet. LFPZ boundaries might change as more accurate terrain data becomes available and is applied. Subsidence may have occurred in some areas since elevations were determined.
Zones depicted in this dataset were created utilizing methods and assumptions described in the accompanying technical manual, and do not necessarily depict areas likely to be protected from flow events for which project levees were designed. Lands within the Levee Flood Protection Zones may be subject to flooding due to various factors, including the failure or overtopping of project or non-project levees, flows that exceed the design capacity of project or non-project levees, and flows from water sources not specifically protected against by project levees. Lands not mapped within a Levee Flood Protection Zone are not invulnerable to flood risk, and some may also experience flooding from these or other processes.
262
EPSG
6.8(9.2.0)
LFPZ_2021_updated_20210413
Feature Class
262
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
0
0
0
Feature geometry.
ESRI
Coordinates defining the features.
TYPE
TYPE
String
50
0
0
This attribute was used by the consultants to define the type of flooding and depths. Since the consultants did not use this field consistently, we no longer use this attribute field.
Flood_Type
Flood_Type
String
100
0
0
This attribute field was used to define the type of flooding. The flooding type was used to determine the approach to delineate each of the LFPZ boundaries.
Depth_Rang
Depth_Rang
String
100
0
0
This attribute field lists the approximate depth of flooding. The Water Code requires DWR to mention whether the depth of flooding is estimated to be greater than 3 feet. We decided not to publish the specific depth ranges because the depth of flooding can easily be misinterpreted because the depth of flooding is for each of the LFPZ polygons and cannot be attributed to any single point within a LFPZ polygon.
Depth_Clas
Depth_Clas
String
100
0
0
This attribute field descibes whether the depth of flooding is deep, shallow, or depth unknown. Deep is defined as being greater than 3', shallow is less than 3', and depth unknown is used where the topographical data was of low accuracy and did not allow a specific depth range to be quantified. We decided not to publish either a specific depth range or a depth class becasue of the possible confusion. Instead, we decided to use the depth of flooding as either "greater than 3 feet" or "depth unknown".
Flood_Sour
Flood_Sour
String
100
0
0
This attribute lists the flooding sources that are associated with each LFPZ polygon. The flooding sources are the rivers, bypasses, and diversion channels, on which there are SPFC levees that protect the associated LFPZ from flooding.
Lfpzid
Lfpzid
Integer
4
0
0
Unique ID for each LFPZ polygon
Sqfeet
Sqfeet
Double
8
0
0
Used for determining the area of the LFPZ. Geometry may need to be recalculated to be accurate.
Shape_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
Shape_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
Simple
FALSE
262
TRUE
FALSE