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Abstract:
City Sanitary and Private Sewers not Maintained by LA County.
Purpose:
To identify nearby private and city sanitary sewers that county sewer crews do not maintain
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Sewers not maintained by Los Angeles County
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Sanitary Sewers Maintained by the Los Angeles County Sewer Maintenance Districts (SMD)
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Abstract:
Sanitary Sewers Maintained by the Los Angeles County Sewer Maintenance Districts (SMD).
Purpose:
Identifies sanitary sewers (gravity sewers, siphons and force mains) maintained by the Department of Public Works.
Supplemental Information:
The Los Angeles County Department of Public Works operates two special districts for the purpose of maintaining sanitary sewers: The Marina del Rey Sewer Maintenance District serves Marina del Rey. The Consolidated Sewer Maintenance District currently covers much of the sewered unincorporated county areas, 40 incorporated member cities, and serves two contract cities. Copies of record plans for sewers in unincorporated county areas and the following cities are available at the Survey Public Counter of the Los Angeles County Public Works Tidemanson Building (HQ), located at 900 South Fremont Avenue, Alhambra, CA 91803. Carson La Mirada Lomita Commerce Lakewood Temple City Copies of record plans for sewers in the following cities need to be obtained from the appropriate City Engineer: Agoura Hills Hidden Hills Pico Rivera Artesia Industry Rancho Palos Verdes Baldwin Park Irwindale Rolling Hills Bell Gardens La Canada-Flintridge Rolling Hlls Estates Bellflower La Habra Heights Rosemead Bradbury La Puente San Dimas Calabasas Lancaster Santa Clarita Cudahy Lawndale Santa Fe Springs Diamond Bar Malibu South El Monte Duarte Palmdale Walnut Glendora Palos Verdes Estates West Hollywood Hawaiian Gardens Paramount Westlake Village Information regarding trunk sewers can be obtained from: Sean Christian Sanitation Districts of Los Angeles County 1955 Workman Mill Road, Whittier, CA 90601 (562) 699-7411 http://www.lacsd.org Mike Brown Las Virgenes Municipal Water District 4232 Las Virgenes Road, Calabasas, CA 91302 (818) 251-2129 http://www.lvmwd.dst.ca.us
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Soil Types
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Abstract:
A polygon layer showing soil types in Los Angeles County. This layer shows the delineation and the county soil number (2-180). These soils have runoff coefficient curves associated with them found in the hydrology manual (http://ladpw.org/wrd/publication/) that allow an individual to determine how much runoff results from rainfall. This includes soils in the Antelope Valley. The layer was created by scanning the Department of Public Work’s Water Resources Division Soil maps.
Purpose:
For use in DPW’s Modified Rational Method Hydrology Model
Supplemental Information:
The latest version of this data is available at http://ladpw.org/wrd/publication/index.cfm
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Los Angeles County Parks
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Abstract:
Parks maintained by Los Angeles County Department of Parks & Recreation.
Purpose:
For general mapping use.
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Direction of flow within Sub Watersheds
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Abstract:
Direction of water flow between sub watersheds (or watershed sub basins).
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Los Angeles County Libraries
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Abstract:
Location of Community Libraries that provide service to residents living in the Los Angeles County Unincorporated areas and residents of 51 of the 88 incorporated cities of Los Angeles County.
Purpose:
For general mapping use
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ALERT(Automatic Local Evaluation in Real Time)/Automatic rain gages
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Abstract:
The location of the ALERT(Automatic Local Evaluation in Real Time)/Automatic rain gages; These sites use tipping buckets with real-time data telemetry and/or electronic data loggers to indicate rainfall totals and intensities.
Purpose:
Data collected is used for calculating rainfall totals and intensities.
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Ground Water Basins
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Abstract:
This represents the groundwater basins and sub-basins as defined by the California Department of Water Resources. Groundwater basins are designated on the basis of geological and hydrological conditions, these usually being the occurrence of alluvial or unconsolidated deposits. When practical, large basins are also subdivided by political boundaries, as in the Central Valley. Basins are named and numbered per the convention of the Department of Water Resources.
Purpose:
To provide information about groundwater basins for public use
Supplemental Information:
Groundwater basins are replenished by the Spreading Grounds (http://ladpw.org/wrd/spreadingground/information); California Department of Water Resources data can be found at http://casil.ucdavis.edu/casil/gis.ca.gov/teale/grdwatba/
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Watershed Management Area
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Abstract:
Watershed Management Area. Based on sub-watershed boundaries, which were digitized by Public Works from USGS quads.
Purpose:
To determine subareas within NPDES Municipal Stormwater Permit
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Water Purveyor Service Areas
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Abstract:
This layer is a representation of the Water Purveyor Service Areas within Los Angeles County.
Purpose:
General mapping, long term water supply planning, and to aid in emergency management during drought.
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A list of Water Companies is attached in this Excel File: Water Company Database.xls
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Stream Gage Locations
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Abstract:
Stream Gage locations.
Purpose:
General mapping use
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Rainfall Intensity
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Abstract:
This data set depicts Los Angeles County precipitation intensity for 24-hour events and return periods of 50 years.
Purpose:
Display and/or analyses requiring precipitation intensity for Los Angeles County
Supplemental Information:
The latest version of this data is available at http://ladpw.org/wrd/publication/. Please contact Ben Willardson (626-458-6117) for information about this data.
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Manually Observed Non-Mechanical Rain Gages
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Abstract:
Location of manually Observed Non-Mechanical Rain Gages; These gages are measured once daily by volunteers and reported monthly.
Purpose:
For calculating rainfall totals and intensity
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Debris Potential Areas
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Abstract:
Los Angeles Basin, Santa Clara River Basin, and Antelope Valley are divided into zones that yield similar volumes of sediment under similar conditions. These are called Debris Potential Area (DPA) zones. Sediment production from a watershed is a rate at which sediment passes a particular point, usually expressed as cubic yards per square mile per storm. The sediment production is dependent upon many factors such as: rainfall intensity, geology, soil type, vegetative coverage, runoff, and watershed slope.
Purpose:
For determining watershed sediment production.
Supplemental Information:
Data was scanned and digitized from Los Angeles County Department of Public Works ‘s Hydrology/ Sedimentation Manual.
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Los Angeles County Boundary
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Abstract:
Los Angeles County Boundary
Purpose:
General mapping use
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DPW Index Map Grid
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Abstract:
This is the grid used to create the Los Angeles County cadastral database. The grids are 15,000 feet high and 20,000 wide.
Purpose:
Base map for the cadastral database
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Los Angeles County Road Maintenance District Boundary
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Abstract:
Areas maintained by Los Angeles County Department of Public Works – Road Maintenance Division.
Purpose:
General mapping use
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Flood Maintenance District Boundary
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Abstract:
Areas maintained by the Los Angeles County Flood Maintenance District.
Purpose:
General mapping use
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County Lighting Maintenance District
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Abstract:
County Lighting Maintenance District shows the boundaries where Los Angeles County Traffic & Lighting Division maintains the street lights.
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Seawater Barriers
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Abstract:
The Los Angeles County Department of Public Works operates and maintains three seawater barriers along Los Angeles County’s coastline. Often unnoticed because of their underground nature, these facilities serve as Los Angeles basin’s fresh water sentinels. They protect a significant portion of the area’s drinking water supply from ocean water, which constantly attempts to migrate into existing aquifers. Treated imported and reclaimed water is injected deep into the underground aquifers to block this inland migration of saltwater.
Purpose:
General mapping use
Supplemental Information:
View http://ladpw.org/wrd/Barriers/index.cfm for additional information
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