Carlotta Shoulder Widening Geotechnical Investigation


SCH Number
Public Agency
California Department of Transportation, District 1 (DOT)
Document Title
Carlotta Shoulder Widening Geotechnical Investigation
Document Type
NOE - Notice of Exemption
Document Description
Caltrans proposes geotechnical field exploration for the Carlotta Shoulder Widening Project on State Route 36 between post miles 3.9 and 6.0 in Humboldt County, west of Carlotta. The project would provide geotechnical recommendations for a proposed bridge, a soldier pile wall, and earthwork associated with shoulder widening. Geotech work would include four 70-foot borings: two near the proposed bridge and two near the proposed wall. A stand-pipe piezometer would be installed in one of the borings and periodically monitored for a period of twelve months before being removed in accordance with Humboldt County Environmental Health agency requirements. Drilling would occur in the roadway and would require lane closures. In addition, a seismic refraction survey would occur on the eastbound shoulder near Fisher Road. Minor clearing and grubbing would be required for the seismic refraction survey.

Contact Information

Cari Williams
Agency Name
Caltrans District 1
Contact Types
Lead/Public Agency


Carlotta, Fortuna
Cross Streets
State Route 36, between Barber Creek Road and Hayfield Lane
Total Acres
less than 1
State Highways
SR 36, post miles 4.10-5.15

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
This project is a basic geotechnical data collection and resource evaluation activity which would not result in a serious or major disturbance to an environmental resource. It is part of a study leading to an action which Caltrans has not yet approved, adopted, or funded.


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