Moccasin Powerhouse Bypass Upgrades Geotechnical Investigation Project
Summary
SCH Number
2026020616
Public Agency
City and County of San Francisco
Document Title
Moccasin Powerhouse Bypass Upgrades Geotechnical Investigation Project
Document Type
NOE - Notice of Exemption
Received
Posted
2/17/2026
Document Description
the San Francisco Public Utllities Comn:iission is proposing to implement the Moccasin Powerhouse Bypass Upgrades Geotechnical Investigation (project) to collect information on ground and soil conditions for a potential water bypass pipeline in Moccasin, canromla. The project Includes eight geotechnlcal borings,
seismic refraction and ground penetrating radar surveys. and twelve potholing sites. The work sites would be in the vicinity of the Moccasin Powerhou~ east of Moccasin Reservoir. The seismic refraction and ground penetrating radar surveys would not involve ground disturbance. The geotechnical borings would be up to 8 inches and diameter and extend up to 50 feet below ground. The primary drilling method would be mud rotary wash with an option for hollow stem auguring. The potholes
would have dimensions of 12 inches by 12 inches and extend up to 10 feet below ground.
Contact Information
Name
Timothy Johnston
Agency Name
San Francisco Planning Department
Job Title
Senior Planner
Contact Types
Lead/Public Agency
Phone
Name
Allison Chan
Agency Name
San Francisco Public Utilities Commission
Job Title
'Environmental Project Manager
Contact Types
Project Applicant
Phone
Email
Location
Cities
San Francisco, Sonora
Counties
San Francisco, Tuolumne
Regions
Northern California
Cross Streets
Moccasin Powerhouse- east of Moccasin Reservoir
Notice of Exemption
Exempt Status
Other
Type, Section or Code
Common Sense Exemption 15061(b)(3)
Reasons for Exemption
This project in its approved form has been determined to be exempt
from environmental review because it fits the definition of the above-stated class of categorical exemption and none of the exceptions to the issuance of a categorical exemption apply.
County Clerks
San Francisco, Tuolumne
Attachments
Notice of Exemption
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