HomeMy WebLinkAbout09.18.20 Dam Safety 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;Lambert, Steve;Lucero, Debra;McCracken, Shari;Paulsen, Shaina;Pickett, Andy;Ring, Brian;
Ritter, Tami;Rodas, Amalia;Sweeney, Kathleen;Teeter, Doug
Subject:Board Correspondence- FW: Dam Safety Compliance Report submitted in FERC P-803-000 by Pacific Gas and Electric Company,et al.
Date:Friday, September 18, 2020 8:19:46 AM
Good morning,
Please see the email below from FERC.
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: Friday, September 18, 2020 5:35 AM
Subject: Dam Safety Compliance Report submitted in FERC P-803-000 by Pacific Gas and Electric Company,et al.
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On 9/18/2020, 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: Dam Safety Compliance Report
Description: Project Safety-Related Submission to SFRO of Pacific Gas and Electric Company under P-803, DeSabla-Centerville Hydro Project, FERC No. 803-
CA, Re: Follow-up Report on 1-12 Fire Impacts to DeSabla-Centerville Project
To view the document for this Filing, click here https://urldefense.com/v3/__https://elibrary.ferc.gov/eLibrary/filelist?accession_num=20200918-
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Mailing Address:
Mail Code N11D
P.O. Box 770000
San Francisco, CA 94177
September 17, 2020
Via Electronic Submittal (E-File)
Mr. 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: DeSabla-Centerville Project, FERC No. 803-CA
Report on 1-12 Fire Impacts to DeSabla-Centerville Project
Dear Mr. Blackett:
(PG&E) follow-up report on a
wildfire that damaged portions of the DeSabla-Centerville Project (Project), Federal Energy
Regulatory Commission (FERC) No. 803, in August 2020. This incident was first reported
isco Regional Office on August 21, 2020.
Background
On the morning of August 17, 2020, lightning sparked 35 fires in Butte County and a total
of 625 fires in California. Four fires were identified near the DeSabla-Centerville Project.
As a result of limited resources, the fires merged into one fire called the - The
fire grew to approximetly 946 acres and was 100 percent contained on September 7, 2020.
See Figure 1.
Damage and Repair Plan
On August 28, 2020, fire officials allowed PG&E to evaluate the damage the fire caused.
PG&E identified 15 locations where trees or log jams affected the Butte Canal. Water was
removed from the canal to prevent flow obstructions from causing overtopping. Flows of
roughly 3.5 cubic feet per second remain in the canal for fish and to meet the Upper
Centerville Canal flow requirements; the Inskip Feeder and Clear Creek feeder provide
these flows. Most fish in the Butte Canal moved to the deep water in the Butte Siphon
area. All license requirements have been met since the fire started.
Mr. Frank L. Blackett, P.E., Regional Engineer
September 17, 2020
Page 2
Figure 1. 1-12 Butte Lightning Complex Burn Scar
The list below provides a summary of damages and a repair plan:
Two locations left depressions in the canal berm. Fill will be added to bring the
canal berm back to grade the canal itself was not damaged (Figure 2).
An overhead communication cable from the Butte Canal to BW97 was destroyed
and fire damaged the bubbler line. Both the cable and the bubbler line will be
replaced (Figures 3 and 4).
Rockfall following the fire caused small punctures to flume sheets (Figure 5).
A metal handrailing damaged by falling trees will be replaced.
Mr. Frank L. Blackett, P.E., Regional Engineer
September 17, 2020
Page 3
Figure 2. A log across Butte Canal caused compaction on the berm.
Figure 3. A Burned Cable Figure 4. A Burned Bubbler (See conduit in lower left)
Mr. Frank L. Blackett, P.E., Regional Engineer
September 17, 2020
Page 4
Figure 5. Flume Sheet Damage from Rockfall
On September 14, 2020, vegetation managment crews began removing trees by hand and
water system repair personnel began repairing damage to the canal and flume. PG&E
estimates the vegetation work and canal and flume repairs will take approximetly 6 weeks
to complete. PG&E plans for Butte Canal to return to service during the last week of
October. All license requirements will be met during the vegetation and repair work.
Should you have any questions concerning this matter, please contact PG&E's license
coordinator, Jamie Visinoni, at (530) 215-6676.
Sincerely,
Elisabeth Rossi
Supervisor, Hydro Licensing