Corte Madera Creek Repair, Mill Valley (Notification of Lake or Streambed Alteration, No. EPIMS-MAN-58752-R3)
Summary
SCH Number
2025120896
Public Agency
California Department of Fish and Wildlife, Bay Delta Region 3
(CDFW)
Document Title
Corte Madera Creek Repair, Mill Valley (Notification of Lake or Streambed Alteration, No. EPIMS-MAN-58752-R3)
Document Type
NOE - Notice of Exemption
Received
Posted
12/19/2025
Document Description
The California Department of Fish and Wildlife has executed Lake and Streambed Alteration Agreement EPIMS Notification No. EPIMS-MAN-58752-R3 pursuant to Section 1602 of the Fish and Game Code to Evan Cross, Architect LEED AP.
The Project is limited to repairs to a previously naturalized section of an existing three-sided concrete stream channel to prevent undermining the channel walls. Similar previous repairs at the Project location were permitted under Streambed Alternation Agreement NO. 1600-2011-0274-R3, which is expired. Material from the previous repairs has since mobilized and is no longer present at the Project location.
To address the undermining during high flows, the Project will create a meander with natural materials to slow flows, as previously done. To achieve this and ensure the material will not mobilize again, the Project will place larger materials including small boulders (24-inch diameter), large rock (12-inch diameter), gravel mixture, and sand within the channel (Exhibit A), totaling in 20.5 cubic yards of materials placed. The placement of these materials will also provide a more natural habitat for aquatic species. All work will be done by hand. Prior to any work within the stream channel, the work area will be dewatered via a water diversion system.
The Project will result in 40 linear feet (400 square feet) of temporary impacts to stream habitat associated with the water diversion system and placement of natural materials. The Project will not result in any permanent impacts to stream habitat.
Contact Information
Name
Jordan Beaton
Agency Name
CA Department of Fish and Wildlife
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Name
Evan Cross
Agency Name
Evan Cross, Architect LEED AP
Job Title
Architect
Contact Types
Parties Undertaking Project
Phone
Location
Coordinates
Cities
Mill Valley
Counties
Marin
Regions
San Francisco Bay Area
Other Location Info
The Project is located at Arroyo Corte Madera Del Presidio Creek, in the County of Marin, State of California at 41-81 Throckmorton Avenue, Mill Valley, CA 94941; Latitude 37.906179°, Longitude -122.547069°.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 4; California Code of Regulations, title 14, section 15304
Reasons for Exemption
The Project consists of minor public or private alterations in the condition of land, water, and/or vegetation which do not involve removal of healthy, mature, scenic trees except for forestry or agricultural purposes.
County Clerk
Marin
Attachments
Notice of Exemption
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