2024-086 Conditional Use Permit - Double Springs Energy Storage Project
2 Documents in Project
Summary
SCH Number
2025120134
Lead Agency
Calaveras County
Document Title
2024-086 Conditional Use Permit - Double Springs Energy Storage Project
Document Type
NOD - Notice of Determination
Received
Posted
8/19/2026
Document Description
Double Springs Energy Storage LLC (Applicant) proposes to construct the Double Springs Energy Storage Project (Project), a utility-scale battery energy storage system (BESS). The proposed Project would consist of lithium-ion batteries installed within modular outdoor enclosures, inverters, medium-voltage transformers, switchgear, a collector substation, and other associated equipment to interconnect the proposed Project at Pacific Gas & Electric (PG&E) Valley Springs Substation (point of
interconnection). Within the enclosures, the batteries would be arranged on battery storage racks with relay and communications systems for automated remote monitoring and managing of the batteries to optimize design performance. A battery management system would be provided to control the charging/discharging of the batteries, along with temperature monitoring and control of the individual battery cell temperature with an integrated cooling system. Power inverters to convert between alternating current (AC) and direct current (DC), along with transformers to step up the voltage, would be included as part of the proposed Project. Associated improvements in the PG&E Valley Springs Substation, Tiger Creek Powerhouse, Electra Powerhouse, and Bellotta Substation are analyzed as part of the proposed Project.
Contact Information
Name
Katherine Stefani
Agency Name
County of Calaveras
Job Title
Senior Planner
Contact Types
Lead/Public Agency
Phone
Name
Paul Gascoigne
Agency Name
Double Springs Energy Storage, LLC
Job Title
Director, Site Acquisition and Strategy
Contact Types
Project Applicant
Phone
Email
Location
Coordinates
Cities
Valley Springs
Counties
Calaveras
Regions
Northern California
Cross Streets
Double Springs Road, 0.20 miles west of Highway 26
Zip
95252
Total Acres
15.17
Parcel #
040-002-017, 040-002-018, and 040-002-019
State Highways
SR 26; SR 12
Railways
n/a
Airports
n/a
Schools
Toyon Middle School
Waterways
New Hogan Lake
Township
4N
Range
11E
Section
9
Base
MDM
Notice of Determination
Approving Agency
County of Calaveras
Approving Agency Role
Lead Agency
Approved On
County Clerk
Calaveras
Final Environmental Document Available at
Calaveras County Planning Department, 891 Mountain Ranch Road, San Andreas, CA 95249
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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