Sonoma RCD Levee Maintenance Program (Notification of Lake or Streambed Alteration, No. EPIMS-SON-35682-R3)


SCH Number
Public Agency
California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW)
Document Title
Sonoma RCD Levee Maintenance Program (Notification of Lake or Streambed Alteration, No. EPIMS-SON-35682-R3)
Document Type
NOE - Notice of Exemption
Document Description
The Project is limited to routine maintenance activities scheduled and implemented as necessary to maintain existing levees protecting the adjacent properties from flooding. Maintenance activities considered to be “routine” are described in Attachment A. In summary these activities include mechanical dredging of sediment from adjacent waterways to reinforce levee structures. Specifically, dredging of up to four cubic yards (cy) of material per linear-foot of levee, not to exceed 10,000-cubic yards or 2,500-linear feet per parcel in one year, for placement onto existing levees. Dredging volumes shall not exceed 150,000 cy in any given year. Mechanical dredging will be completed using long-reach clamshell excavators or a drag line excavator working from the top of existing levees, and dredged material will be excavated on the outboard side of the levee at the extreme reach of the available equipment to avoid damage to the levee toe. Dredging will not occur within 10 feet of the toe of the levee. Dredged material will be placed on the levee crown and mechanically compressed. Maintenance activities may result in minor temporary loss of salt marsh habitat in the form of targeted pickleweed removal using hand tools, as is required under Measure 2.23.

Contact Information

James Hansen
Agency Name
Job Title
Environmental Scientist
Contact Types
Responsible Agency


Unincorporated area
Northern California, San Francisco Bay Area
Other Location Info
The project is located at 23 distinct locations within the Petaluma River and Sonoma Creek watersheds, in the County of Sonoma, State of California.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
The project consists of operation, repair, and maintenance of existing structures involving negligible or no expansion of existing or former use.
County Clerk


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