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Channel Clearing
Background
To provide our stakeholders with important information about earth-bottom channel maintenance and other Los Angeles County Flood Control District (District) activities, we have launched a user-friendly website dedicated to the maintenance of our comprehensive flood protection and water conservation system. Through this website, users will have access to available reports, studies, maintenance schedules, and watershed maps showing earth-bottom channel reaches throughout the District.
Included among the more than 500 miles of open channel maintained by the District are more than 45 miles of earth-bottom channel. In order to avoid loss of life or property due to storm events, adequate channel capacity within these earth-bottom sections needs to be maintained. Maintenance of the engineered earth-bottom channels is a significant effort and requires the removal of sediment, vegetation, debris, and any other obstructions that would reduce the hydraulic capacity and ensure unrestricted flow in the channel. The District performs these maintenance activities in a timely manner to ensure public safety.
County Soft Bottom Reaches Map
Reports
On February 4, 2010, the California Regional Water Quality Control Board issued a new Waste Discharge Requirement (WDR) Order Number R4-2010-0021 to regulate the District�s Soft-Bottom Channel (SBC) maintenance clearing activities. This WDR supersedes the 1999 401 Certification, as last amended in August 2008. The first Annual Project and Mitigation Monitoring Report to be submitted under the new WDR will cover the 2010-11 SBC maintenance clearing activities and was available on May 1, 2011.
In compliance with the new WDR permit, the following are the links to FTP folders that contain the Biological Reports, Annual Reporting Documentation and other files related to the maintenance of these SBC reaches by year:
Annual Biological and Monitoring Reports
Schedule
The following link to the soft-bottom channel maintenance clearing activities schedule for current year includes soft-bottom channel reach names/numbers, Thomas Guide page, proposed/scheduled start and finish dates for the maintenance clearing activities, and a chart showing the District’s progress. For up-to-date information, please visit this page as the schedule is frequently updated during the storm season. Also, the updates for the current week are highlighted in red text.