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Sorrento Channel Maintenance

Maps 6 & 6a

The project provides for the periodic removal of sediment, hydrophytic vegetation, trash, and debris from two concrete-lined storm water channels in Sorrento Valley. The Project will temporarily affect 0.06 acre of errant wetland vegetation that is growing on accumulated sediment within cement drainage channels.

Pursuant to the 401 the loss of pollution assimilation functions will be mitigated by the retrofitting of three, existing storm drain inlets with Curb Inlet Filters along a 1300-feet section of Sorrento Valley Road, which is in the same industrial/business neighborhood as the two project channels. The location of the Curblet Inlet Filters is shown here.

The City received the following permits for routine maintenance in Sorrento Valley:

  • 404 Nationwide Permit 39, Issued 9/8/2010, Expires 3/18/2012
  • 401 Water Quality Certification 10C-054, Issued 9/8/2010, Expires 9/1/2013 - Amended 12/29/10 to allow one-time maintenance only
  • 1602 Streambed Alteration Agreement 1600-2009-0301-R5, Issued 9/13/2010, Expires 9/30/2015

LISTED SPECIES: No suitable habitat to support listed species is present and no take permit is required.

  • Date of Routine Maintenance - Maintenance work commenced on September 14, 2010 and was completed on September 24, 2010.
  • Amount of Debris Removed - To date, maintenance efforts have removed 489.38 tons of sediment, trash and vegetation that could have been conveyed downstream to Penasquitos Lagoon.
  • Maintenance Activity Reports
  • Routine Maintenance Photo Documentation

Compensatory Mitigation

Maps 7, 8, 9, 10, 11 & 12

Permits are in process for maintenance of this site. Updates will be added as permits are approved.