Pine Creek Mine Hydroelectric Project
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Summary
- SCH Number
- 2020069038
- Lead Agency
- State Water Resources Control Board
- Document Title
- Pine Creek Mine Hydroelectric Project
- Document Type
- NOD - Notice of Determination
- Received
- Posted
- 8/27/2020
- Document Description
- The proposed Project is located in northwestern Inyo County, northwest of the City of Bishop. The Project site is upstream of the confluence of Morgan Creek and Pine Creek and accessed via Pine Creek Road. The Pine Creek Mine facilities and operations are presently inactive. The Project would include installation of a hydroelectric turbine within the Easy-Go Adit, about 2,480 linear feet underground. The water source for the Project is water draining from the underground mine workings. When the Easy-Go Adit was opened in the 1960's, miners encountered a significant amount of water. The water percolates through fissures, fractures, and boreholes formed during the mining activities. The quantity of water draining into the adit varies seasonally, ranging from about 7-14 cubic feet per second (cfs) seasonally as an indirect function of snowmelt. Average inflow is estimated to be about 10 cfs. The Project would utilize an existing concrete plug in the mine to store up to 200 acre-feet of water, creating a gross head of up to 1,320 feet for power generation. The Project would include construction an 18-inch-diameter, 120-foot-long steel penstock to connect the existing piping and plug features to the proposed 1,500-kilowatt Pelton turbine generator. Water exiting the turbine would discharge into a V-shaped granite channel within the adit and flow down-gradient to the intake for the existing exempt hydroelectric facility (FERC Project No. 13163) and mine water discharge system, located below the adit. The water would then be routed through that existing facility's existing penstock and turbine and discharged into the existing pond (Pond 6), from which it would flow over that pond's concrete spillway and into Morgan Creek, shortly above its confluence with Pine Creek.
- Contact Information
-
Philip Meyer
State Water Resources Control Board
Lead/Public Agency
1001 I Street
Sacramento, CA 95814
Phone : (916) 341-5369
-
Pine Creek Mine, LLC
Project Applicant
Location
- Counties
- Inyo
- Other Location Info
- Inyo County above the confluence of Morgan Creek and Pine Creek
Notice of Determination
- Approving Agency
- State Water Resources Control Board
- Approving Agency Role
- Lead Agency
- Approved On
- Final Environmental Document Available at
- 1001 I Street, Sacramento CA, 95814
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
- No
- (4) A mitigation reporting or monitoring plan was adopted for this project
- No
- (5) A Statement of Overriding Considerations was adopted for this project
- No
- (6) Findings were made pursuant to the provisions of CEQA
- No
Attachments
- Environmental Document
- Appendix A_red PDF 2438 K Appendix B_red PDF 1848 K Appendix C_red PDF 220 K Appendix D_red PDF 5655 K Appendix E_red PDF 8321 K Appendix F_red PDF 6419 K Appendix G_red PDF 20590 K Appendix H_red PDF 15130 K Appendix I_red PDF 415 K Appendix J_red PDF 5027 K Appendix K_red PDF 1345 K Appendix L_red PDF 317 K Appendix M PDF 95 K
- Notice of Determination
- 2020069038_Pine Creek Mine Hydroelectric Project PDF 704 K
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