HomeMy WebLinkAbout01.21.21 BOS Correspondence -FW_ Project Operations Compliance Report submitted in FERC P-803-000 by Pacific Gas and Electric Company,et al.
From:Schuman, Amy
To:Alpert, Bruce;Bennett, Robin;Clerk of the Board;Connelly, Bill;Cook, Holly;Cook, Robin;Kimmelshue, Tod;Lambert, Steve;Lucero, Debra;McCracken,
Shari;Paulsen, Shaina;Pickett, Andy;Ring, Brian;Ritter, Tami;Rodas, Amalia;Sweeney, Kathleen;Teeter, Doug
Subject:BOS Correspondence -FW: Project Operations Compliance Report submitted in FERC P-803-000 by Pacific Gas and Electric Company,et al.
Date:Thursday, January 21, 2021 8:32:34 AM
Good morning,
Please see the email below.
Amy Schuman
Associate Clerk of the Board
Butte County Administration
25 County Center Drive, Suite 200, Oroville, CA 95965
O: 530.552.3300 |D: 530.552.3308 | F: 530.538.7120
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From: 'FERC eSubscription' <eSubscription@ferc.gov>
Sent: Thursday, January 21, 2021 5:15 AM
Subject: Project Operations Compliance Report submitted in FERC P-803-000 by Pacific Gas and Electric Company,et al.
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On 1/21/2021, 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-803-000
Lead Applicant: Pacific Gas and Electric Company
Filing Type: Project Operations Compliance Report
Description: Pacific Gas and Electric Company submits the updated plan and schedule for implementing the long-term erosion protection measures
for the DeSabla Forebay Dam of the DeSabla-Centerville Hydro Project under P-803.
To view the document for this Filing, click here https://urldefense.com/v3/__https://elibrary.ferc.gov/eLibrary/filelist?accession_num=20210121-
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Mailing Address:
Mail Code N11D
P.O. Box 770000
San Francisco, CA 94177
January 19, 2021
Via Electronic Submittal (E-File)
Mr. Frank 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: DeSabla-Centerville Hydroelectric Project, FERC No. 803-CA
DeSabla Forebay Dam, NATDAM No. CA00343
Analysis of Alternatives DeSabla Forebay Erosion Controls
ENCLOSURE CONTAINS CUI//CEII DO NOT RELEASE
Dear Mr. Blackett:
This letter presents an update on the status of
efforts to address erosion at DeSabla Forebay Dam, which is part of DeSabla-
Centerville Hydroelectric Project, Federal Energy Regulatory Commission (FERC) No.
803. In recent years, inspections have identified areas with limited or no vegetative cover
and erosion rills on the downstream face of the dam. As described in a letter to your office
dated November 30, 2020, PG&E plans to install temporary erosion control measures to
limit the potential for additional erosion untillong-term mitigation measures are designed
and constructed. updated plan and schedule for implementing the long-term
erosion protection measures is provided below.
In a letter to FERC dated June 26, 2019, PG&E provided a plan and schedule to address
action items identified following the 2018 annual FERC inspection of the DeSabla-
Centerville Project. One of the items, Action Item No. 2, was to investigate and repair
erosion-affected areas on the downstream slopes of DeSabla Forebay Dam. For
reference, Action Item No. 2 is copied below:
At DeSabla Forebay, the erosion prone unvegetated areas on the downstream
slope shows evidence of rodent burrows. Please investigate, make slope repairs,
and abate as necessary.
PG&E has completed its evaluation of potential alternatives for long-term erosion
mitigation measures at the dam. Results of the evaluation are presented in a technical
Mr. Frank L. Blackett, P.E., Regional Engineer
January 19, 2021
Page 2
memorandum prepared by Gannett Fleming, Inc., a copy of which is enclosed with this
letter for FERC review (Enclosure 1). Based on the results of the evaluation, PG&E has
its preferred alternative, which will involve
regrading and covering the downstream slope of the dam with a 6-inch-thick layer of 2-inch
by 4-inch crushed, angular rock. PG&E expects to complete engineering design of the
proposed erosion protection measures in the spring of 2021 and will submit a construction
package for FERC review and authorization by July 31, 2021.
PG&E also acknowledges receipt of authorizing
PG&E to proceed with its plans for temporary erosion control measures at the dam. PG&E
is preparing to install the temporary controls in late January of 2021.
Should you have any technical questions concerning this matter, please contact
dam safety engineer, Ms. Kaitlyn Thatcher, at (707) 342-7885. For general questions,
, Ms. Jamie Visinoni, at (530) 215-6676.
Sincerely,
David L. Ritzman, P.E., G.E.
Chief Dam Safety Engineer
Enclosure: CUI//CEII DO NOT RELEASE
1. Alternatives Analysis, DeSabla Forebay Slope Erosion Control, prepared by Gannett
Fleming, dated October 5, 2020