South Delta Improvement Program Exploration Drilling Project
Summary
SCH Number
2005058076
Public Agency
California Department of Water Resources
(DWR)
Document Title
South Delta Improvement Program Exploration Drilling Project
Document Type
NOE - Notice of Exemption
Received
Posted
5/3/2005
Document Description
The purpose of the SDIP Exploration Drilling Project is to collect geologic data on channel and land sediments. These data are necessary for the design and construction of various features of the SDIP, specifically the radial gates at the four proposed permanent barrier sites at Old River, head of Old River, Middle River, and Grant Line Canal-West. Data would be collected from drill cuttings at these four locations, for a combined total of 6 in-channel holes, 3 deep landside holes, and 18 shallow landside holes. Deep holes would be drilled 100-130 feet deep; shallow holes, 10-30 feet deep. Each hole would be 4.5 inches wide. Sediment characteristics would be analyzed according to standard methods. All deep holes would be backfilled with a bentonite cement grout upon completion. Following soil classification, 6 of the shallow holes would be converted to permanent observation wells, while the remaining 10 would be backfilled. South Delta water diverters may benefit from completion of this project, as the collection of these data is necessary to designing the SDIP.
Contact Information
Name
Juan Escobar
Agency Name
Department of Water Resources
Contact Types
Lead/Public Agency
Phone
Location
Cities
Tracy
Counties
Contra Costa, San Joaquin
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Section 15306
Reasons for Exemption
Project involves the collection of basic data and would not result in a serious or major disturbance to any aquatic or terrestrial resources. Water quality would not be impacted because no discharge of sediments into the water channel would occur. Further, in-channel work would occur during the window of time recommended to avoid impacts to sensitive aquatic species/habitats (August-November).
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 state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.