Soda Creek Landslide


SCH Number
Public Agency
California Department of Transportation, District 3 (DOT)
Document Title
Soda Creek Landslide
Document Type
NOE - Notice of Exemption
Document Description
The Office of Geotechnical Design West (OGDW) proposes a geotechnical investigation to support the design and construction of a proposed new Soda Creek Wall and associated site improvements located between PM 1.7 and 2.5 of Highway 253 in Mendocino County, California, near Boonville. To characterize and evaluate the subsurface conditions, Caltrans proposes to excavate three shallow test pits and drill five mud-rotary borings. Test pits are anticipated to be approximately three feet wide by 10 feet long and will be excavated to a depth of up to seven feet using a backhoe. The average depth for the 4.75-inch-diameter vertical borings is estimated to be approximately 70 feet below ground surface (bgs).

Contact Information

Rajpreet K Bihala
Agency Name
California Department of Transportation
Contact Types
Lead/Public Agency


Northern California
State Highways
State Route 253
Other Information
State Route 253 between postmiles 1.70 and 2.50 in Mendocino County

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
This project meets 15306 criteria of consisting 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."
County Clerk


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