HomeMy WebLinkAbout6.28.22 Board Correspondence - FW_ Dam Safety Compliance Report submitted in FERC P-619-000 by Pacific Gas and Electric Company,et al. (2)
From:Paulsen, Shaina
To:BOS
Subject:Board Correspondence - FW: Dam Safety Compliance Report submitted in FERC P-619-000 by Pacific Gas and
Electric Company,et al.
Date:Tuesday, June 28, 2022 12:00:51 PM
Please see Board Correspondence below.
Shaina Paulsen
Associate Clerk of The Board
Butte County Administration
25 County Center Drive, Suite 200, Oroville, CA 95965
T: 530.552.3304 | F: 530.538.7120
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Sent: Tuesday, June 28, 2022 10:25 AM
Subject: Dam Safety Compliance Report submitted in FERC P-619-000 by Pacific Gas and Electric Company,et al.
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On 6/28/2022, the following Filing was submitted to the Federal Energy Regulatory Commission (FERC),
Washington D.C.:
Filer: Pacific Gas and Electric Company
No Organization Found (as Agent)
Docket(s): P-619-000
Lead Applicant: Pacific Gas and Electric Company
Filing Type: Dam Safety Compliance Report
Description: Pacific Gas and Electric Company submits Plunge Pool Underwater Inspection Report for Grizzly
Forebay Dam, Bucks Creek Hydroelectric Project, under P-619.
To view the document for this Filing, click here
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June 28, 2022
Via Electronic Submittal (E-File)
Frank L. Blackett, P.E., Regional Engineer
Federal Energy Regulatory Commission
Division of Dam Safety and Inspections
San Francisco Regional Office
100 First Street, Suite 2300
San Francisco, CA 94105-3084
RE: Bucks Creek Hydroelectric Project, FERC No. 619-CA
Grizzly Forebay Dam, NATDAM No. CA00333
Plunge Pool Underwater Inspection Report
ENCLOSURES CONTAIN CUI//CEII DO NOT RELEASE
Dear Frank L. Blackett:
This letter presents the plunge pool underwater inspection report for Grizzly Dam, which is
part of Bucks Creek Hydroelectric Project,
Federal Energy Regulatory Commission (FERC) No. 619. In a letter to PG&E dated April
18, 2006, FERC recommended that an underwater inspection of the plunge pool be
performed to evaluate the condition of the concrete at the plunge pool to dam interface.
Generally, this dive inspection has been filed with the areas of special monitoring in the
combined dam safety surveillance and monitoring plan and report (DSSMP/R) for Grizzly
Dam. However, due to the size of the 2021 DSSMP/R it was determined that a separate
filing would be appropriate, and the results of the report were only included by reference in
the DSSMP/R.
A detailed comparison of current findings with the previous dive in 2013 was not possible
because of the generalized nature of the previous inspection. The 2013 dive inspection
report was filed with your office on October 13, 2013.The current report (Enclosure 1) will
serve as the baseline for further detailed inspections.
As described in the dive report, the diver found the dam concrete to be in good condition,
the concrete toe ledge extending from the dam to be in fair condition with areas of erosion
and undercutting observed, and the plunge pool native rock to be in good condition. The
report also supports the continued inspection of the dam at the FERC-recommended 5-
year interval.
Frank L. Blackett, P.E., Regional Engineer
June 28, 2022
Page 2
dam safety engineer, Roy Arnold, at (559) 575-5122. For general questions, please
Jamie Visinoni, at (530) 215-6676.
Sincerely,
Robert O. Ellis, P.E., G.E.
Deputy Chief Dam Safety Engineer
Enclosures: CUI//CEII DO NOT RELEASE
1. PG&E Grizzly Plunge Pool Underwater Inspection Report, prepared by Bruce S. Elster, PE,
Shoreline Engineering, Inc., and dated September 8, 2020
2. Video (zip)