Geotechnical Investigation for Santa Clara River Streambank Protection Project
Summary
SCH Number
2007078102
Public Agency
Ventura County Watershed Protection District
Document Title
Geotechnical Investigation for Santa Clara River Streambank Protection Project
Document Type
NOE - Notice of Exemption
Received
Posted
7/9/2007
Document Description
This project is a geotechnical study that will determine the nature of underlying soil conditions to aid the in the design and construction of four (4) groin structures that are to be installed on the south bank of the Santa Clara River as bank protection for the adjacent landfill beneath the golf course.
In spring of 2005, the river experienced significant flooding which triggered substantial erosion along many bank areas. An area of particular concern is located approximately 0.6 miles south of the Highway 101 Bridge where the river bends from north/south direction to an east/west direction. The outside of this bend sustained significant erosion during the spring 2005 flood events. While this bank had undergone installation of eight (8) protective groin structures in 1992 to protect an existing historic landfill, heavy channel flows in 1998 damaged many of these structures. After the heavy flows of 2005, only a few remains existed of two groins and five others were completed destroyed. In an effort to prevent further erosion of the bend after the spring of 2005, three (3) replacement groins were installed at this bend in 2006. These groins protect approximately 600 feet of channel bank, but an additional 1500 feet of bank at this location remains vulnerable. The installation of four (4) additional groins will provide the necessary bank protection.
Contact Information
Name
Jeff Pratt
Agency Name
Ventura County Watershed Protection District
Contact Types
Lead/Public Agency
Phone
Location
Counties
Ventura
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Section 15304[f],Section 15306
Reasons for Exemption
Section 15304: Class 4 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. Examples include, but are not limited to: (f) Minor trenching and backfilling where the surface is restored
Section 15306: Class 6 consists of basic data collection, research, experimental management, and resource evaluation activities which do not result in a serious or major disturbance to an environmental resource. These may be strictly for information gathering purposes, or as part of a study leading to an action which a public agency has not yet approved, adopted, or funded.
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.