This website provides a limited number of Substructure Maps in
“pdf” format via GIS polygons representing grids containing URL links. Across
various areas of Los Angeles County, paper maps were created by Public Works (PW) and its predecessor Departments to show underground
utilities such as cable TV, gas, oil, and telephone lines.
Though most of these maps
are no longer updated, they can be useful as a research resource. Every
reasonable effort has been made to assure the accuracy of this data and the
maps referenced. Some cities may provide substructure information for the areas
not covered by these grids. Additional and more accurate substructure data and
information may also be obtained through the utility companies. Before digging,
it is strongly advised to contact the Underground Service Alert (DigAlert
Express) at www.digalert.org/digexpress.html
or by calling 811.
Please note that California
State Law Says, You Must Contact DigAlert!
The County of Los Angeles
makes no warranty, representation, or guarantee as to the content, sequence,
accuracy, timeliness, or completeness of any of the data provided herein or of
any maps referenced. Los Angeles County Public Works recommends that all utility
research be conducted under the supervision of a licensed civil engineer.