Geotechnical Drilling Investigation for Trenchless Culvert Replacement


SCH Number
Lead Agency
Caltrans, District 1 - Eureka (California Department of Transportation, District 1)
Document Title
Geotechnical Drilling Investigation for Trenchless Culvert Replacement
Document Type
NOE - Notice of Exemption
Project Applicant
California Department of Transportation (Caltrans)

Document Description
Caltrans proposes to conduct geotechnical drilling on State Route (SR) 299 at Post Mile (PM) 11.98 and 16.45. The purpose of the geotechnical drilling is to characterize the subsurface soil conditions to determine appropriate trenchless replacement methods for two existing culverts. The investigation would involve 4 vertical mud-rotary borings, 75-100 feet in depth, which would be constructed as piezometers to measure ground water elevations within the fill prism. Drilling would occur from the existing paved lanes of SR 299, requiring temporary lane closure and traffic-control.

Contact Information
Amanda Lee
1656 Union Street
Eureka, CA 95501

Phone : (707) 441-4571


Blue Lake
State Highways
State Route 299
Other Location Info
At post miles 11.98 and 16.46

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Class 6 Information Collection 14 CCR § 15306
Reasons for Exemption
The proposed project involves information collection which would not result in serious or major disturbance to an environmental resource.


Notice of Exemption
2020070412_Geotech Drilling(HUM-299 Culverts)   PDF 428 K

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