Parent Layer: LADWP Storm Drain System

Name: LADWP Storm Drain System Maintenance Hole

Display Field: NAME

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Description: Data Type: point dataA maintenance hole is digitized from paper or scanned imagery.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:AttributeDescriptionASBDATEThe date the design plans were approved "as-built" or accepted as "final records".CROSS_SECTION_SHAPEThe cross-sectional shape of the pipe or channel. Examples include round, square, trapezoidal, arch, etc.DIAMETER_HEIGHTThe diameter of a round pipe or the height of an underground box or open channel.DWGNODrain Plan Drawing Number per LACFCD NomenclatureEQNUMAsset No. assigned by the Department of Public Works (in Maximo Database).MAINTAINED_BYIdentifies, to the best of LAFCD's knowledge, the agency responsible for maintaining the structure.MOD_DATEDate the GIS features were last modified.NAMEName of the individual drainage infrastructure.OWNERAgency that owns the drainage infrastructure in question.Q_DESIGNThe peak storm water runoff used for the design of the drainage infrastructure.SOFT_BOTTOMFor open channels, indicates whether the channel invert is in its natural state (not lined).SUBTYPEMost feature classes in this drainage geometric nature contain multiple subtypes.UPDATED_BYThe person who last updated the GIS feature.WIDTHWidth of a channel in feet.This Storm Drain Dataset is a work in progress, and all users of this data are STRONGLY ENCOURAGED to obtain the most current copy, available for download at theegis LA County HUBTerms of UseThis data is derived from the County Cadastral Landbase and features are typically added to this dataset per recorded 'as-built' drawings. Accurate facility locations on the ground must be determined by qualified field personnel. If any errors are found, or if there are general questions, please contact the individuals listed in the Credits.This product is for information purposes and should not be used for legal, engineering, or survey purposes. County assumes no liability for any errors or omissions.

Service Item Id: 4e51e0d7c6ab49f39b40e0c6e3557edb

Copyright Text: This data is maintained by the Los Angeles County Department of Public Works, Mapping & GIS Services (mapping@dpw.lacounty.gov)

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Label: LADWP Storm Drain System Maintenance Hole
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