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HomeMy WebLinkAbout12.03.19 Email from FERC - Part 12 Consultant Safety Inspection Reports by PGE J SAP # 3838257 3838257 2313749 2313749 LC Task: 29LC Task: 31 DSE Task: 7 DSE Task: 28DSE Task: 30LC Task: N/A LC Task: N/ADSE Task: 12 I Proposed Submittal Date Within 90 days after FERC acceptance of the studies. If FERC has not accepted the studies before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by November 1, 2022.Within 90 days after FERC acceptance of the studies. If FERC has not accepted the studies before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by November 1, 2022.Within 90 days of FERC acceptance of the analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020.The STID will be updated within 90 days of FERC acceptance of the PMF analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the analysis and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020. H PG&E Status Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review. page 1 G Outstanding Part 12 Recommendations regarding PMFs Part 12D Recommendation Recommendation 7: The stress and stability analyses for the dam should be reviewed for PMF loading when the results of the updated PMF study are reviewed and accepted by FERC.Recommendation 8: The structural analysis of the parapet wall should bereviewed for the HMR 58/59 PMF loading when the results of the updatedPMF study are reviewed, verified and accepted by FERC.Recommendation 1: An addendum to the PFMA report should be prepared after the results of the updated HMR 58/59 PMF study are available to reclassify PFM 1 as appropriate. The addendum should be submitted to FERC and be included in the STID.Recommendation 6: PG&E is currently in the process of updating the PMF flood routing for Belden Forebay Dam using HMR 58/59. The study is expected to be finalized and submitted to FERC and the Independent Consultants for review early next year. The report should be reviewed by the Independent Consultants and the results incorporated into Section 6 of the STID after the report has been accepted by FERC. F PG&E 9/14/179/14/17 1/14/16, 8/29/16, 9/28/16, 6/29/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 12/21/1712/21/17 12/29/10, 12/28/15, 12/28/15, 12/28/15, 12/28/15, submittal Date E 7816 Rec No. 99 D 1010 Report Part 12 C Grizzly Grizzly Belden Belden ForebayForebayForebayForebay Dam Name B CA00413CA00413 CA00333CA00333 Dam Number A 619619 21052105 Project No. DESABLA AREA 2 2021222324 Enclosure A J SAP # 3838254 2313748 3838253 2313748 LC Task: 12 DSE Task: 7 LC Task: N/A DSE Task: 30LC Task: N/ADSE Task: 19 LC Task: N/ADSE Task: 20 I Proposed Submittal Date The STID will be updated within 90 days of FERC acceptance of the PMF analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the analysis and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020.Within 90 days of FERC acceptance of the analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020.Within 90 days of FERC acceptance of the analyses. If FERC has not accepted the analyses before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020.Within 90 days of FERC acceptance of the PMF analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the analysis and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020. H PG&E Status Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review. page 2 G Outstanding Part 12 Recommendations regarding PMFs Part 12D Recommendation Recommendation 10: PG&E updated the PMF flood routing for Belden Forebay Dam using HRM 58/59 in 2010. The flood routing should be reviewed to verify the results of the analysis and that the assumptions made in the analysis are consistent with current conditions. If necessary, the PMF should be rerouted assuming the actual crest camber. Update of Section 6 of the STID for the HMR 58/59 study should be deferred until the review is completed and the report is accepted by FERC.Recommendation 1: An addendum to the PFMA report should be prepared after the results of the updated HMR 58/59 PMF study are available to reclassify PFM 2 as appropriate. The addendum should be submitted to FERC and be included in the STID.Recommendation 3: PG&E is currently in the process of updating the PMF flood routing for Belden Forebay Dam using HMR 58/59. The study is expected to be finalized and submitted to FERC and the Independent Consultants for review early next year. The report should be reviewed by the Independent Consultants and the results incorporated into Section 6 of the STID after the report has been accepted by FERC.Recommendation 7: PG&E updated the PMF flood routing for Butt Valley Dam using HMF 58/59 in 2010. PG&E should review and verify the assumptions and results of the 2010 HMR 58/59 study, including verifying that the appropriate most current spillwy rating cureve was used in the analysis. Also, the PMF should be routed through the spillway to verify the channel capacity and its adequacy to pass the flood. Update of Section 6 of the STID to include the HMR 58/59 study should be deferred until the review is completed and the report is accepted by FERC. F PG&E 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 12/21/1712/21/1712/21/1712/21/17 12/28/15, 12/28/15, 12/28/15, 12/28/15, submittal Date E 137 10 Rec No. 99 D 1010 Report Part 12 C Belden Forebay Butt ValleyButt ValleyButt Valley Dam Name B CA00413 CA00326CA00326CA00326 Dam Number A 2105210521052105 Project No. 2 25262728 Enclosure A J SAP # 38382492865838 2313745 2313745 LC Task: 13 DSE Task: 7 DSE Task: 9 LC Task: N/ALC Task: N/ALC Task: N/ADSE Task: 22DSE Task: 10 I Proposed Submittal Date Within 90 days of FERC acceptance of the analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020.Within 90 days of FERC acceptance of the analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020.Within 90 days of FERC acceptance of the PMF analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the analysis and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2020.Within 90 days of FERC acceptance of the analysis. If FERC has not accepted the anlaysis before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2022. H PG&E Status Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the PMF study for Feather River Projects (filed 8/29/16) and the wind-wave and Phase 1 Analysis (filed 9/14/17), PG&E will review the stress and stability anlyses of the dam for the PMF loading condition. The results of the review will be summarized in a memo, and will be submitted for FERC review.Upon FERC acceptance of the "Probable Maximum Flood Estimate Revisions for Selected Dams in the Mokelumne River and Stanislaus River Watersheds (filed 3/23/17), PG&E will provide a plan and schedule to incorporate the results into Section 6 of the STID. page 3 G Outstanding Part 12 Recommendations regarding PMFs Part 12D Recommendation Recommendation 1: An addendum to the PFMA report should be prepared after the results of the updated HMR 58/59 PMF study are available to reclassify PFM 3 as appropriate. The addendum should be submitted to FERC and be included in the STID.Recommendation 3: PG&E is currently in the process of updating the PMF flood routing for Lake Almanor Dam using HMR 58/59. The study is expected to be finalized and submitted to FERC and the Independent Consultants for review early next year. The report should be reviewed by the Independent Consultants and the results incorporated into Section 6 of the STID after the report has been accepted by FERC.Recommendation 9: PG&E updated the PMF flood routing for Lake Almanor Dam using HMR 58/59 in 2010. To date, FERC has not formally accepted the study. Section 6 of the STID should be updated after the new hydrology studies are accepted by FERC.Recommendation 7: Section 6 of the STID should be updated when the new HMR 58/59 hydrology studies are completed and accepted by FERC. F PG&E 2/2/16, 3/23/17 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 1/14/16, 8/29/16, 9/28/16, 6/29/17, 9/14/17, 12/1/12, 2/28/14, 9/30/16, 12/21/1712/21/1712/21/17 12/28/15, 12/28/15, 12/28/15, 12/28/12, 10/27/15, submittal Date E 5 139 Rec No. 99 D 10 10 Report Part 12 C Lower Bear Dam Name Lake Almanor Lake Almanor Lake Almanor B CA00409 CA00327CA00327CA00327 Dam Number A 137 210521052105 Project No. CENTRAL AREA 2 293031323334 Enclosure A J SAP # 4496977 20735202073520 2080333 LC Task: 4 LC Task: 19LC Task: 17 DSE Task: 6 DSE Task: 23DSE Task: 13DSE Task: 15LC Task: N/A I Proposed Submittal Date Within 90 days of FERC acceptance of the analysis. If FERC has not accepted the anlaysis before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2022.The STID will be updated within 90 days of FERC acceptance of the PMF analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the analysis and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2022.Within 90 days of FERC acceptance of the analysis. If FERC has not accepted the analysis before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2022.Within 90 days of FERC acceptance of the study. If FERC has not accepted the study before the next Part 12D safety inspection, PG&E will review the status of the assessment and associated follow-up items with the next Part 12D Independent Consultant by December 1, 2023. H PG&E Status Upon FERC acceptance of the "Probable Maximum Flood Estimate Revisions for Selected Dams in the Mokelumne River and Stanislaus River Watersheds (filed 3/23/17), PG&E will provide a plan and schedule to update the STID.Upon FERC acceptance of the "Probable Maximum Flood Estimate Revisions for Selected Dams in the Mokelumne River and Stanislaus River Watersheds" (filed 3/23/17), PG&E will provide a plan and schedule to review the standard flood operational procedures.Upon FERC acceptance of the "Probable Maximum Flood Estimate Revisions for Selected Dams in the Mokelumne River and Stanislaus River Watersheds (filed 3/23/17), PG&E will review the credible PFMs related to PMF loading with the next Part 12D Independent Consultant.As noted in Section 5.3 of the 2013 Part12D inspection safety report for Drum Afterbay, R-4 is partially addressed. PG&E retained a consultant to perform a flood routing of the 100 year storm which was submitted to your office on Feb. 22, 2017. Upon FERC acceptance of the flood routing study for the 100-year storm (filed 2/22/17), PG&E will file a plan and schedule to update the STID. page 4 G Outstanding Part 12 Recommendations regarding PMFs Part 12D Recommendation Recommendation 7: Update the STID when the FERC accepts the 2017 PMF studies.Recommendation 4: We recommend that PG&E review and possibly revise the standard flood operational procedures by December 31, 2008, to ensure that they are clear and can be implemented to prevent overtopping of the dam during the thunderstorm PMF. The procedure should identify when an operator is stationed near the dam.Recommendation 7. The three remaining credible PFMs all relate to PMF flood loading and potential for overtopping of the dam. We concur with the previous P12D Independent Consultants that updated PMF studies need to be completed to determine the risks of potential dam overtopping. Recommendation 4: The STID should be updated to include a spillway rating curve which includes the 6-inch curb on the crest. Inflow/outflow hydrographs and a tailwater rating curve should be developed and documented. Finally, the IDF for this low hazard potential dam should be the 100-year flood. This should be completed by December 31, 2010. F PG&E 2/2/16, 1/4/18, 11/2/18 1/30/18 12/1/12, 4/24/14, 9/30/16, 3/23/17, 1/29/08, 3/23/17, 1/29/13, 4/24/14, 4/29/15, 3/23/17, 1/29/09, 2/22/17, 12/21/1712/21/17 10/27/15, submittal Date E 744 7 Rec No. 99 D 10 10 Report Part 12 C Lyons ReliefRelief Drum AB Dam Name B CA00387CA00390CA00390CA00421 Dam Number A 10612310 21302130 Project No. 2 35363738 Enclosure A