Poison Lake Curve Improvement - Seismic Survey


SCH Number
Public Agency
California Department of Transportation, District 2 (DOT)
Document Title
Poison Lake Curve Improvement - Seismic Survey
Document Type
NOE - Notice of Exemption
Document Description
Caltrans is proposing a project to conduct survey adjacent to the roadway within the postmiles 6.5/7.1 in Lassen County on State Route 44. The survey consists of laying cable across the ground and attaching small geophones to the cable. The geophones record shock waves in the ground, which are used to determine the underlying soil layers. Shock waves are created by any combination of 3 methods : Striking a metal plate on the ground with a hammer, firing a blank shotgun shell in the bottom of a 24" deep hole that has been back filled and tamped.The purpose of the project is to gather information that will be utilized in a follow up curve improvement project.

Contact Information

Andre' Benoist
Agency Name
Contact Types
Lead/Public Agency


Northern California
State Highways
State Route 44

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
15306 Class 6; Information Collection
Reasons for Exemption
The proposed project is exempt given that 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 approved, adopted, or funded. The project has no potential to impact the environment.


Notice of Exemption

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