HomeMy WebLinkAbout02.01.21 BOS Correspondence -FW_ Status Report submitted in FERC P-1061-019,et al. 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: Status Report submitted in FERC P-1061-019,et al. by Pacific Gas and Electric Company,et al.
Date:Monday, February 1, 2021 8:15:24 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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-----Original Message-----
From: 'FERC eSubscription' <eSubscription@ferc.gov>
Sent: Sunday, January 31, 2021 3:35 PM
Subject: Status Report submitted in FERC P-1061-019,et al. by Pacific Gas and Electric Company,et al.
.ATTENTION: This message originated from outside Butte County. Please exercise judgment before opening attachments, clicking
on links, or replying..
On 1/29/2021, the following Filing was submitted to the Federal Energy Regulatory Commission (FERC), Washington D.C.:
Filer: Pacific Gas and Electric Company
Pacific Gas and Electric Company (as Agent)
Docket(s): P-1061-019
P-1121-000
P-1354-000
P-137-000
P-175-000
P-1962-001
P-1988-000
P-2105-000
P-2106-000
P-2107-000
P-2130-000
P-2310-000
P-233-000
P-2687-000
P-2735-000
P-619-000
P-77-001
P-803-000
Lead Applicant: Pacific Gas and Electric Company
Filing Type: Status Report
Description: Pacific Gas and Electric Company submits the overdue Status Reports for the Potter Valley Hydroelectric Project et
al under P-77, et. al..
To view the document for this Filing, click here https://urldefense.com/v3/__https://elibrary.ferc.gov/eLibrary/filelist?
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245 Market Street
tƚǞĻƩ DĻƓĻƩğƷźƚƓ
San Francisco, CA 94105
Mailing Address:
Mail Code N11D
P.O. Box 770000
January 29, 2021
San Francisco, CA 94177
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: Overdue Items: Status Update
Potter Valley Hydroelectric Project, FERC Project No. 77
Mokelumne River Hydroelectric Project, FERC Project No. 137
Balch Hydroelectric Project, FERC Project No. 175
Pit 3, 4, and 5 Hydroelectric Project, FERC Project No. 233
Bucks Creek-Grizzly Hydroelectric Project, FERC Project No. 619
DeSabla-Centerville Hydroelectric Project, FERC Project No. 803
Phoenix Hydroelectric Project, FERC Project No. 1061
Battle Creek Hydroelectric Project, FERC Project No. 1121
Crane Valley Hydroelectric Project, FERC Project No. 1354
Rock Creek-Cresta Hydroelectric Project, FERC Project No. 1962
Haas Kings River Hydroelectric Project, FERC Project No. 1988
Upper North Fork Feather River Hydroelectric Project, FERC Project No. 2105
McCloud-Pit Hydroelectric Project, FERC Project No. 2106
Poe Hydroelectric Project, FERC Project No. 2107
Spring Gap-Stanislaus Hydroelectric Project, FERC Project No. 2130
Drum-Spaulding Hydroelectric Project, FERC Project No. 2310
Pit 1 Hydroelectric Project, FERC Project No. 2687
Helms Pumped Storage Hydroelectric Project, FERC Project No. 2735
Dear Mr. Blackett:
This letter presents an update on the status of
dated July 20, September 16, and November 24, 2020 for the above-listed projects. As of January
29, 2021, twenty-two of the items have been completed. The status of each remaining overdue
item is provided in enclosure 1.
Should you have any technical questions concerning this matter, please contact me at (415) 624-
4218.
Sincerely,
Teri Smyly
Manager FERC Compliance
Enclosure: Status Update of Overdue Items
ENCLOSURE 1
4/30/20214/30/20217/31/20217/31/20216/30/20216/30/20214/30/20214/30/2021
PG&E DUE DATE
(DATE)
EOTR GRANTED
1/7/20211/7/20211/7/20211/7/20211/7/20211/7/2021
12/24/202012/24/2020
TIME REQUESTED
DATE EXTENSION OF
PG&E STATUS - 1/29/2021
Filed EOT request for 12/24/2020: In consultation with the Filed EOT request for 12/24/2020: In consultation with the Conducting engineering review and developing plan and Final
PFMA report undergoing internal review.
STATUS OF FERC ITEM RESPONSES
Pending completion of 7th Board of Consultants Meeting in Conducting substantial revisions to plan and schedule based Analysis required to complete prior to update of plan and
: Pit 1 completed field inspection in December 2020 and
Ongoing currently finalizing report. Ongoing:Q1 of 2021, will file updated schedule with final reports of site-specific probable maximum precipitation and flood studies.Ongoing: IC,
PG&E is currently collecting and reviewing available information to identify potential gaps and concerns for which additional investigation and evaluation are needed to support the
recommended FEM analyses.Ongoing: IC, PG&E is currently collecting and reviewing available temperature-related information for the dam. Following detailed review of the information,
PG&E will work with the IC to determine whether a new temperature study is needed to develop revised temperature-related parameters for an updated structural analysis of the dam.Ongoing:
schedule requirements consistent with 2019 PFMA and 5/29/2020 FERC letter.Ongoing:on 5/29/2020 FERC letter outlining recommended updates to 2019 PFMA.Ongoing: Ongoing:schedule.
OVERDUE ITEMS DESCRIPTION
Pit 1 DamScott Dam: 2014 Part 12D Recommendations (R-8, R-13, R-39, R-66, R-70): Updated Plan & Schedule2019 Part 12D Balch Div. (R-7, R-13, R-14); Balch AB (R-7, R-11, R-12): Results
of Data Collection EffortsBalch Div. (R-12): Results of Documentation Review Evaluation of Potential effects of Overtopping effects and a plan & Schedule for Mitigation against any
adverse effectsSeven items due within 90 days of FERC acceptance of studiesPit 3 Dam: Fault 3432 PFMA Workshop ReportPit 5 Open Channel: Plan & Schedule for completing recommendations
from the Focused Spillway Assessmentletter).
77
No.
175175233233
2687
FERC Project
233, 1121, 2106, 2688233, 1121, 2106, 2688
10-Year Spillway Radial Gate Inspection Reports (GIRs)
35
101112131517
No.
FERC Item
Potter ValleyBalchPMF & Wind-Wave StudiesPit No. 3, 4 and 5DeSabla Centerville
5/31/20215/31/20214/30/20214/30/20214/30/20214/30/20212/26/20212/26/2021
4/30/2021
1/7/20211/7/20211/7/20211/7/20211/7/20211/7/20211/7/2021
12/29/202012/29/2020
Revised construction package under development for final Plan and schedule undergoing internal review. Plan and schedule undergoing internal review.
Filed EOT request on 12/29/2020. PG&E is revising the DPP Revised construction package under development for final Plan and schedule undergoing internal review. Evaluation report
undergoing internal review.
: Filed EOT request on 12/29/2020. PG&E is revising the DPP : Filed EOT request on 1/6/2021. PG&E is currently finalizing
Ongoing:for Round Valley Dam to reflect updates to the Cape Horn Dam DPP that were necessary for FERC authorization of that effort. Ongoing for Philbrook Main and Auxiliary Dams to reflect
updates to the Cape Horn Dam DPP that were necessary for FERC authorization of that effort. Ongoing: internal review prior to approval.Ongoing:internal review prior to approval.Ongoing:Ongoing:
Ongoing construction documents and preparing project certifications to support the project construction report which will be submitted to FERC.Ongoing: Ongoing:
Round Valley Dam: Revised DPP*Philbrook Dam: Revised DPP*Hendricks Head Dam: Repair Plan to address seepRound Valley Dam: Log Boom Construction PackageRound Valley Dam: Plan & Schedule
for Focused Spillway Assessment recommendationsletter)Philbrook Dam: Memorandum/a regarding subterranean water flow and plan and schedule for completing recommendations from the Focused
Spillway Assessment Coleman Intake Siphon No. 1: Final Construction Report for Automated Trash Rake ProjectColeman Forebay: Results of 2019 Subsurface Investigation results and plan
and schedule for completing seepage and stability analysesMacumber Dam: 2020 Spillway Toe Evaluation Report
803803803803803803
112111211121
181922232425272830
Battle CreekCrane Valley
7/31/20214/30/20219/30/20216/30/2021
1/4/2021
1/7/2021
12/29/202012/29/2020
Filed EOT request 1/4/2021. The project team is currently Plan and schedule undergoing internal review. Filed EOT request on 12/29/2020. PG&E has initiated an Filed EOT request
on 12/29/2020. PG&E has retained a
Ongoing:developing design criteria and performing analyses to validate and advance the design elements that were conceptually developed and evaluated during the project alternatives
analysis. PG&E is currently planning a dive inspection to confirm as-built conditions in the spring of 2021 and expects to complete its 50 percent project design package in the summer
of 2021, with a scheduled target for construction in the fall of 2023. By July 31, 2021, PG&E will submit to FERC an update on the status and schedule for design and construction of
the proposed tower improvements. Ongoing:Ongoing:engineering review of potential alternatives for modifying the parapet wall manways to mitigate the potential for concentrated flows
beneath the manway boards during flood conditions. The review options, such as using alternative construction details or materials to better seal the access portals against leakage.
PG&E plans to complete the review, including a constructability assessment to evaluate the feasibility of the various alternatives, in the summer of 2021.Ongoing:consultant to perform
stochastic flood modeling of Courtright Reservoir to develop the recommended probabilistic reservoir elevation parameters. To support the modeling effort, PG&E has successfully procured
engineering documents, operation records, and the results of previous probable maximum precipitation (PMP) and probable maximum flood (PMF) studies. PG&E plans to collect additional
information, including historical hydrologic data; however, because of challenges related to the volume of information and limited ability to access archived files during the COVID-19
pandemic, PG&E requires additional time to collect and review the necessary data.
Crane Valley Dam: Status update and plan and schedule for completing the outlet tower retrofit designRock Creek Cresta Dam: 2019 FERC annual dam safety inspection: Plan and schedule
for addressing the follow-up itemsCourtright Dam P12D (R-7): Feasibility study for modifying the parapet wall manwaysCourtright Dam Part 12D (R-8): Results of data collection efforts
as a first step to evaluating the potential for overtopping
1354196219881988
31323435
Rock Creek CrestaHaas-Kings
5/31/20219/30/20216/30/20214/30/20212/26/2021
1/7/20211/7/2021
12/29/202012/29/202012/29/2020
Alternatives analysis report undergoing internal review.
Filed EOT request on 12/29/2020. PG&E has completed an Filed EOT request on 12/29/2020. PG&E has initiated an Filed EOT request on 12/29/2020. PG&E has retained a Contracting
additional analysis support for plan and
Ongoing:investigation into the cause of the bolt failure at the top of the butterfly valve seat ring and is preparing an assessment report to document field findings, material testing
results for the failed bolt, and an engineering evaluation of the remaining seat ring bolts. PG&E also completed its annual full-travel exercise of the valve in August 2020. Leakage
and monitoring observations during the exercise will also be noted in the assessment report. Because of delays in scheduling the investigation, additional time is needed to complete
the report and provide the results of the assessment to the Part 12D IC for review and comment Ongoing:engineering review of potential alternatives for modifying the parapet wall manways
to mitigate the potential for concentrated flows beneath the manway boards during flood conditions. The review options, such as using alternative construction details or materials to
better seal the access portals against leakage. PG&E plans to complete the review, including a constructability assessment to evaluate the feasibility of the various alternatives, in
the summer of 2021. Ongoing:consultant to perform stochastic flood modeling of Wishon Reservoir to develop the recommended probabilistic reservoir elevation parameters. To support the
modeling effort, PG&E has successfully procured engineering documents, operation records, and the results of previous probable maximum precipitation (PMP) and probable maximum flood
(PMF) studies. PG&E plans to collect additional information, including historical hydrologic data; however, because of challenges related to the volume of information and limited ability
to access archived files during the COVID-19 pandemic, PG&E requires additional time to collect and review the necessary data. Following the collection efforts, PG&E plans to work with
its consultant to identify potential data gaps, additional information sources, and additional studies that may be necessary to complete the modeling effort.Ongoing:schedule development.Ongoing:
Wishon Dam Part 12D (R-7): Investigation and evaluation report for the LLO butterfly valve seat ring bolt failureWishon Dam Part 12D (R-8): Feasibility Study for modifying Parapet Wall
Manways Wishon Dam Part 12D (R-11): Results of data collection efforts as a first step to evaluating the potential for overtopping Courtright & Wishon Dams: Plan and schedule to address
Focused Spillway Assessment Report recommendationsMcCloud Spillway: Alternatives analysis report and status update to support remediation
19881988198819882106
3637383944
McCloud PitPoe
4/30/20216/30/20214/30/20214/30/20214/30/2021
1/7/20211/7/20211/7/20211/7/2021
12/29/2020
: PG&E will investigate the oak tree and provide a
Vegetation removed.
Contracting additional analysis support for plan and
Plan and schedule undergoing internal review. Developing documentation to address recommendations
: Filed EOT request on 12/29/2020. PG&E has completed an
Ongoing:Ongoing engineering and geologic reconnaissance of the Main Strawberry Dam spillway control structure including visual observations, measurements, and geologic mapping of the
structure and underlying foundation conditions. Information gathered during the reconnaissance was used to support an updated stability analysis of the structure. Preliminary results
of the analysis indicate that the structural stability is within acceptable limits for normal, flood, and seismic load cases. PG&E provided the results of the updated spillway stability
analysis to the eleventh Part 12D ICs for review and is Ongoing: schedule development.Rock Creek Ongoing specific evaluation of the subject oak tree, along with a plan and schedule
if necessary, for FERC review by 4/30. Wise FB Complete:Ongoing:and plan and schedule if necessary to meet them.
2019 FERC annual dam safety inspection: Plan and schedule for addressing the follow-up itemsStrawberry Dam: Part 12D (R-6): Updated stability analyses of the spillway Relief & Strawberry
Dams: Plan and schedule to address Focused Spillway Assessment Report recommendations. (no Rock Creek & Wise FB: 49 .Plan and schedule for addressing follow-up items No. 16 and 17 ,
respectively) from the 2018 FERC annual dam safety inspection: (no response received on these items from Halsey AB: Focused Spillway Assessment: Plan and schedule to address recommendations
from and FERC comments: Due by 2/22/20 (no response
21072130213023102310
4647484951
Spring Gap StanislausDrum Spaulding
4/30/20214/30/20212/26/20212/26/20212/26/20212/26/2021
1/7/20211/7/20211/7/20211/7/20211/7/2021
8/27/2020
Assessment undergoing internal review. Report undergoing internal review.
Developing documentation to address recommendations PG&E obtaining engineering contract support to complete Study undergoing internal review.
: Filed EOT request 8/27/2020. PG&E has performed
Ongoing:and plan and schedule if necessary to meet them.Ongoing preliminary seismic deformation studies for Upper Peak Lake Dam based on the available geotechnical data from both Upper
Peak and Kidd Lake Dams. As noted in the original P12 response, the studies at Kidd Lake are relevant to Upper Peak because of the similar location, age, and composition of the dams.
PG&E has been delayed in completing the Upper Peak seismic deformation study.Ongoing:plan and schedule required for response.Ongoing: Ongoing: Ongoing:
Halsey FB 1: Focused Spillway Assessment: Plan and schedule to address recommendations from and FERC comments: Due by 2/22/20 (no response Upper Peak Lake: Seismic stability and deformation
analysis (Eleventh Part 12D recommendation R-3): Due by 3/31/20, Fordyce: Response to FERC comments on the structural analysis of the rear valve house wall: Due by 5/1/20 (no response
Fuller Lake Dam: Assess the appropriate monitoring frequency for obtaining accurate readings of Weir YB-12A: Due by 3/25/20 letter).Upper Peak Lake Dam: Assess seepage flow monitoring
options following rehabilitation of the spillway and masonry wall: Due by 3/25/20 letter).Meadow Lake Dam: Supplement to Liquefaction Sensitivity Seismic Stability Study: (Tenth Part
12D recommendation R-7): Due by 6/8/20 (no response received to
231023102310231023102310
525455565758
2/26/20212/26/20212/26/20212/26/20212/26/20216/30/2021
1/7/20211/7/20211/7/20211/7/20211/7/20211/7/2021
Analysis undergoing internal review.
COVID19 impact to inspections schedules associated with
Analysis undergoing internal review. Plan and schedule undergoing internal review. Analysis undergoing internal review.
: Report undergoing internal review
OngoingOngoing:Ongoing:Ongoing: Ongoing:Ongoing: subdrain system. Updating timeline to reflect delay and resulting plan and schedule associated with findings.
Spaulding Lake Dam #3: Report justifying to upgrade the weirs downstream: (Ninth Part 12D recommendation R- 1.3.4.5): Due 4/24/20 letter).Wise FB Dam: Hydraulic sensitivity analysis:
(Fourth Part 12D recommendation R-1): Due 4/24/20 letter).Wise FB Dam: Plan and schedule for upgrading the instrumentation and monitoring systems, adding an automatic shutoff at the
intake, and/or improving the downstream spill channel: (Fifth Part 12D recommendations R-4, R-6, and R- 7, respectively): Due by 7/31/20, according to Halsey FB Dam 1: Review of the
static stability analysis for the right abutment section: (Eighth Part 12D recommendation 3/29/19 letter. Halsey FB Dam 2: Deformation Analysis of the Modified Embankment are valid:
Due by 7/15/20 letter).Halsey FB Dam 2: Internal video inspection report for the subdrain system: (Eighth Part 12D recommendation R-6): Due by 9/30/20,
231023102310231023102310
596061626364
6/30/20216/30/20212/26/2021
1/7/20211/7/20211/7/2021
Analysis completed, developing report for independent
Analysis completed, developing report for independent
Implementing actions to address comments.
Ongoing: consultant review and comment.Ongoing: consultant review and comment.Ongoing:
Halsey FB Dam1: Review of existing information regarding subsurface conditions and the liquefaction susceptibility of the foundation materials: (Eighth Part 12D recommendation R-1):
Due letter.Wise FB: Review of existing information regarding subsurface conditions and the expected seismic performance of the foundation materials: (Fifth Part 12D recommendation R-10):
Due by 11/1/20, Pit 1 FB Dam: Plan and schedule for addressing comments from the Ninth Part 12D report : Due by 6/12/20 (no response
231023102687
656667