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Subtypes:
Improved: An open drainage course confined with lined or unlined embankments.
Unimproved: A natural drainage course graded to channelize storm water.
Swale: A graded depression with relatively low slope to channelize storm water.
Ditch: A trench provided to channelize storm water.
Attributes: Most of the feature classes in this storm drain geometric network share the same GIS table schema. Only the most critical attributes per operations of the Los Angeles County Flood Control District are listed below:
Attribute | Description |
ASBDATE | The date the design plans were approved "as-built" or accepted as "final records". |
CROSS_SECTION_SHAPE | The cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc. |
DIAMETER_HEIGHT | The diameter of a round pipe or the height of an underground box or open channel. |
DWGNO | Drain Plan Drawing Number per LACFCD Nomenclature |
EQNUM | Asset No. assigned by the Department of Public Works' (in Maximo Database). |
MAINTAINED_BY | Identifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure. |
MOD_DATE | Date the GIS features were last modified. |
NAME | Name of the individual drainage infrastructure. |
OWNER | Agency that owns the drainage infrastructure in question. |
Q_DESIGN | The peak storm water runoff used for the design of the drainage infrastructure. |
SOFT_BOTTOM | For open channels, indicates whether the channel invert is in its natural state (not lined). |
SUBTYPE | Most feature classes in this drainage geometric nature contain multiple subtypes. |
UPDATED_BY | The person who last updated the GIS feature. |
WIDTH | Width of a channel in feet. |
Subtypes:
Stream: A natural drainage course devoid of human interference.
Watercourse: A channelized natural drainage.
Attributes: Most of the feature classes in this storm drain geometric network share the same GIS table schema. Only the most critical attributes per operations of the Los Angeles County Flood Control District are listed below:
Attribute | Description |
ASBDATE | The date the design plans were approved "as-built" or accepted as "final records". |
CROSS_SECTION_SHAPE | The cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc. |
DIAMETER_HEIGHT | The diameter of a round pipe or the height of an underground box or open channel. |
DWGNO | Drain Plan Drawing Number per LACFCD Nomenclature |
EQNUM | Asset No. assigned by the Department of Public Works' (in Maximo Database). |
MAINTAINED_BY | Identifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure. |
MOD_DATE | Date the GIS features were last modified. |
NAME | Name of the individual drainage infrastructure. |
OWNER | Agency that owns the drainage infrastructure in question. |
Q_DESIGN | The peak storm water runoff used for the design of the drainage infrastructure. |
SOFT_BOTTOM | For open channels, indicates whether the channel invert is in its natural state (not lined). |
SUBTYPE | Most feature classes in this drainage geometric nature contain multiple subtypes. |
UPDATED_BY | The person who last updated the GIS feature. |
WIDTH | Width of a channel in feet. |
Subtypes:
Maintenance Hole: A vertical, circular or rectangular shaft providing access to an underground storm drain for inspection and cleanout. It is typically located where two or more gravity mains converge, at intermediate points along tangent sections, and where inlet connections are made.
Diversion Structure: A structure which directs storm water runoff to a desired location. It typically routes sediment-laden runoff to a treatment facility or infiltration drain field system.
Junction Structure: A structural coupling that joins two different pipes.
Tide Chamber: A structure and related appurtenances which allow the overflow of excess storm water runoff to enter receiving waters and prevent back flow of receiving waters into storm drain system.
Attributes: Most of the feature classes in this storm drain geometric network share the same GIS table schema. Only the most critical attributes per operations of the Los Angeles County Flood Control District are listed below:
Attribute | Description |
ASBDATE | The date the design plans were approved "as-built" or accepted as "final records". |
CROSS_SECTION_SHAPE | The cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc. |
DIAMETER_HEIGHT | The diameter of a round pipe or the height of an underground box or open channel. |
DWGNO | Drain Plan Drawing Number per LACFCD Nomenclature |
EQNUM | Asset No. assigned by the Department of Public Works' (in Maximo Database). |
MAINTAINED_BY | Identifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure. |
MOD_DATE | Date the GIS features were last modified. |
NAME | Name of the individual drainage infrastructure. |
OWNER | Agency that owns the drainage infrastructure in question. |
Q_DESIGN | The peak storm water runoff used for the design of the drainage infrastructure. |
SOFT_BOTTOM | For open channels, indicates whether the channel invert is in its natural state (not lined). |
SUBTYPE | Most feature classes in this drainage geometric nature contain multiple subtypes. |
UPDATED_BY | The person who last updated the GIS feature. |
WIDTH | Width of a channel in feet. |
Attributes: Most of the feature classes in this storm drain geometric network share the same GIS table schema. Only the most critical attributes per operations of the Los Angeles County Flood Control District are listed below:
Attribute | Description |
ASBDATE | The date the design plans were approved "as-built" or accepted as "final records". |
CROSS_SECTION_SHAPE | The cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc. |
DIAMETER_HEIGHT | The diameter of a round pipe or the height of an underground box or open channel. |
DWGNO | Drain Plan Drawing Number per LACFCD Nomenclature |
EQNUM | Asset No. assigned by the Department of Public Works' (in Maximo Database). |
MAINTAINED_BY | Identifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure. |
MOD_DATE | Date the GIS features were last modified. |
NAME | Name of the individual drainage infrastructure. |
OWNER | Agency that owns the drainage infrastructure in question. |
Q_DESIGN | The peak storm water runoff used for the design of the drainage infrastructure. |
SOFT_BOTTOM | For open channels, indicates whether the channel invert is in its natural state (not lined). |
SUBTYPE | Most feature classes in this drainage geometric nature contain multiple subtypes. |
UPDATED_BY | The person who last updated the GIS feature. |
WIDTH | Width of a channel in feet. |
Subtypes:
Standard: A typical gravity main.
Inverted Siphon: A gravity main that siphons stormwater to flow under an obstruction.
Other: All other types of gravity mains.
Attributes: Most of the feature classes in this storm drain geometric network share the same GIS table schema. Only the most critical attributes per operations of the Los Angeles County Flood Control District are listed below:
Attribute | Description |
ASBDATE | The date the design plans were approved "as-built" or accepted as "final records". |
CROSS_SECTION_SHAPE | The cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc. |
DIAMETER_HEIGHT | The diameter of a round pipe or the height of an underground box or open channel. |
DWGNO | Drain Plan Drawing Number per LACFCD Nomenclature |
EQNUM | Asset No. assigned by the Department of Public Works' (in Maximo Database). |
MAINTAINED_BY | Identifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure. |
MOD_DATE | Date the GIS features were last modified. |
NAME | Name of the individual drainage infrastructure. |
OWNER | Agency that owns the drainage infrastructure in question. |
Q_DESIGN | The peak storm water runoff used for the design of the drainage infrastructure. |
SOFT_BOTTOM | For open channels, indicates whether the channel invert is in its natural state (not lined). |
SUBTYPE | Most feature classes in this drainage geometric nature contain multiple subtypes. |
UPDATED_BY | The person who last updated the GIS feature. |
WIDTH | Width of a channel in feet. |
Subtypes:
Closed: A culvert which flows under pressure.
Open: A culvert which does not flow under pressure.
Attributes: Most of the feature classes in this storm drain geometric network share the same GIS table schema. Only the most critical attributes per operations of the Los Angeles County Flood Control District are listed below:
Attribute | Description |
ASBDATE | The date the design plans were approved "as-built" or accepted as "final records". |
CROSS_SECTION_SHAPE | The cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc. |
DIAMETER_HEIGHT | The diameter of a round pipe or the height of an underground box or open channel. |
DWGNO | Drain Plan Drawing Number per LACFCD Nomenclature |
EQNUM | Asset No. assigned by the Department of Public Works' (in Maximo Database). |
MAINTAINED_BY | Identifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure. |
MOD_DATE | Date the GIS features were last modified. |
NAME | Name of the individual drainage infrastructure. |
OWNER | Agency that owns the drainage infrastructure in question. |
Q_DESIGN | The peak storm water runoff used for the design of the drainage infrastructure. |
SOFT_BOTTOM | For open channels, indicates whether the channel invert is in its natural state (not lined). |
SUBTYPE | Most feature classes in this drainage geometric nature contain multiple subtypes. |
UPDATED_BY | The person who last updated the GIS feature. |
WIDTH | Width of a channel in feet. |
Subtypes:
Side Opening: A catch basin with a standard, vertical curb opening.
Grated: A catch basin with a grate-covered opening located in the plane of the gutter or pavement.
Combination: A catch basin with both side and grated openings.
Inlet: A flared-type catch basin typically made of corrugated steel pipe (CSP).
Cover: A lid for the access hole to a catch basin, typically made of cast iron.
Insert: A manufactured frame incorporating filter or fabric and placed in a curb opening to remove trash, and sediments from catch basins. It is also a form of Best Management Priactice.
Cover & Insert: A combined cover and insert device.
Attributes: Most of the feature classes in this storm drain geometric network share the same GIS table schema. Only the most critical attributes per operations of the Los Angeles County Flood Control District are listed below:
Attribute | Description |
ASBDATE | The date the design plans were approved "as-built" or accepted as "final records". |
CROSS_SECTION_SHAPE | The cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc. |
DIAMETER_HEIGHT | The diameter of a round pipe or the height of an underground box or open channel. |
DWGNO | Drain Plan Drawing Number per LACFCD Nomenclature |
EQNUM | Asset No. assigned by the Department of Public Works' (in Maximo Database). |
MAINTAINED_BY | Identifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure. |
MOD_DATE | Date the GIS features were last modified. |
NAME | Name of the individual drainage infrastructure. |
OWNER | Agency that owns the drainage infrastructure in question. |
Q_DESIGN | The peak storm water runoff used for the design of the drainage infrastructure. |
SOFT_BOTTOM | For open channels, indicates whether the channel invert is in its natural state (not lined). |
SUBTYPE | Most feature classes in this drainage geometric nature contain multiple subtypes. |
UPDATED_BY | The person who last updated the GIS feature. |
WIDTH | Width of a channel in feet. |
This layer represents current city boundaries within Los Angeles County. The Los Angeles County Department of Public Works provides the most current shapefiles representing city boundaries and city annexations on the Los Angeles County GIS Data Portal. True, legal boundaries are only determined on the ground by surveyors licensed in the State of California. Numerous records are freely available at the Land Records Informaiton website, hosted by the Department of Public Works.
Note: This boundary layer will not line up with the Thomas Brothers® city layer.
Principal attributes include:
CITY_NAME: represents the city's name.
CITY_TYPE: may be used for definition queries; "Unincorporated" or "City".
FEAT_TYPE: identifies the feature that each polygon represents:
Land - This value is used for polygons representing the land masses, if you want to see only land features on your map.
Pier - This value is used for polygons representing piers along the coastline. One example is the Santa Monica Pier.
Breakwater - This value is used for polygons representing man-made barriers that protect the harbors.
Water - This value is used for polygons representing navigable waters inside the harbors and marinas.
3NM Buffer - This value is used for polygons representing the three seaward nautical miles within the cities' limits, per the Submerged Lands Act.