LA County Active Construction Projects

The records include existing and proposed bikeways, and bike path access points. They are also indicative of a proposed bikeway as well as several records of bike path portions that are maintained by other jurisdictions.

This layer was created to represent soil types in Los Angeles County. Polygons were derived from scanned soil maps. Attributes include a soil number (2-180), corresponding to runoff coefficient values in a Hydrology Manual, provided by the Los Angeles County Department of Public Works, Water Resources Division.

More detailed information related to Class numbers and their meaning can be found here: http://ladpw.org/wrd/Publication/Engineering/2006_Hydrology_Manual/Appendix-C.zip

Major individual Watersheds within the Santa Monica Bay Watersheds.

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

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

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. Data collected is used for calculating rainfall totals and intensities.

Catch basins collect urban runoff from gutters

Based on City Annexations
This layer is used for locating past and present legal city boundaries and for retrieving annexation records. Overlapping polygons indicate territories that transferred between cities. This layer’s URL field can be used for retrieving recorded city annexation documents online.

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.