Natomas East Main Drainage Canal (NEMDC) Confirmation Explorations


SCH Number
Public Agency
Central Valley Flood Protection Board
Document Title
Natomas East Main Drainage Canal (NEMDC) Confirmation Explorations
Document Type
NOE - Notice of Exemption
Document Description
Nine geotechnical borings and one pothole excavation will be conducted to acquire confirmation data related to the location of the existing slurry cutoff wall and to confirm the as-built drawings of the flood gates. The depth of the borings will range from five feet to 80 feet in depth. Each boring is expected to take one day for approximately 10 days although they may not be continuous. Generally, hollow stem augers will be used and rotary wash drilling will be used in some cases but not in the levee section. All borings will be grouted to the surface at completion.

Contact Information

Mary Ann Hadden
Agency Name
Central Valley Flood Protection Board
Contact Types
Lead/Public Agency



Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15304(f), 15306
Reasons for Exemption
The Army Corps of Engineers (USACE) consulted informally with US Fish and Wildlife Service (USFWS) and determined that the borings were not likely to affect the Valley elderberry long-horned beetle (VELB) and concurrence was received from USFWS on 11/16/2011.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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