Circuit Reliability Review

Transcription

1 Circuit Reliability Review Rancho Cucamonga January 2018

2 Building a Smarter Grid for Southern California Southern California Edison is developing an electric grid to support California s transition to a clean and sustainable future that meets the needs and expectations of our customers. We are investing more than $13 billion in the power distribution grid over three years ( ). Our main investment goal is to increase power reliability through significant upgrades. The investments include: Upgrading cables, poles, switches and transformers Updating the grid so it can accommodate new technologies, such as smart inverters that will allow for the twoway flow of solar energy Adapting the power system to accommodate future California policy related to energy storage, electric transportation and renewable energy Providing enhanced automation and monitoring devices to allow us to better respond to changes on the grid Our investments in local communities will help ensure that customers receive safe, reliable, and affordable electricity now and in the future. Learn more at edison.com/innovation 2

3 Understanding Your Reliability Report As your electric utility, we want you to always have power when you need it. To get there, we constantly track and monitor electric outages across our service territory, and we measure our system reliability from this data. The two metrics we rely on are common in the electric utility industry: the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI). Both are described in more detail on the next page. Replacing and upgrading our infrastructure will help SCE maintain or improve SAIDI and SAIFI measurements. This report provides historical reliability data for the circuits that serve your jurisdiction and our proposed infrastructure upgrades for the current year. To view other reliability reports, visit sce.com>outage Center>Maintaining Reliable Service 3

4 Reliability Metrics MOMENTARY OUTAGES: OUTAGES LASTING 5 MINUTES OR LESS SUSTAINED OUTAGES: OUTAGES LASTING LONGER THAN 5 MINUTES MAIFI: o The number of times the average customer is interrupted by Momentary outages each year. SAIFI: o The number of times the average customer is interrupted by Sustained outages each year. SAIDI: o The cumulative amount of time the average customer is interrupted by Sustained outages each year. 4

5 Cities in the FOOTHILL District CityList1 BLOOMINGTON COLTON FONTANA GLEN AVON JURUPA VALLEY MIRA LOMA MUSCOY PEDLEY RANCHO CUCAMONGA RIVERSIDE RUBIDOUX SUNNYSLOPE 5

6 * Exclusions are days which utilities are allowed to remove from their metrics because the outages on those days were caused by a severe acts of nature. **In the columns showing Rank, lower numbers indicate poorer performance. 6

7 Overview of Rancho Cucamonga CircuitList1 There are 63 circuits that serve Rancho Cucamonga 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ACOSTA(12KV) 1,054 GURNEY(12KV) 1,604 UNSER(12KV) 1,903 - ALSTOT(12KV) 1,545 HANKS(12KV) 630 YARBOROUGH(12K AMETHYST(12KV) 1,519 HASTY(12KV) 950 ZINSER(12KV) 1,670 - ANDRETTI(12KV) 351 HOPE(12KV) ASHFORD(12KV) 1,246 JAYBIRD(12KV) 2, BANYAN(12KV) 1,702 KAISER(12KV) 1, BARILLA(12KV) 1,624 KENYON(12KV) 2, BEECHWOOD(12KV) 1,683 LA GRANDE(12KV) 1, BELUSHI(12KV) 1,185 MAGOO(12KV) 1, BENNY(12KV) 16 MARCONI(12KV) 2, BIANCO(12KV) 1,639 MARX(12KV) 1, BIG RIGG(12KV) 1,674 MEARS(12KV) 1, BOYNTON(12KV) 77 METRO(12KV) 2, CAGLI(12KV) 1,384 PATRON(12KV) CALABASH(12KV) 81 PEBBLE(12KV) 2, CALVO(12KV) 1,670 PREGO(12KV) 1, CORDON(12KV) 2,443 PRYOR(12KV) 2, DANGERFIELD(12KV) 1,491 RAHAL(12KV) 1, DONOHUE(12KV) 1,334 REDWOOD(12KV) 1, DRONE(12KV) 1,969 ROSSI(12KV) 1, DYNAMICS(12KV) 161 RUTHERFORD(12KV) EARNHARDT(12KV) 2,456 RUTTMAN(12KV) 1, FERON(12KV) 1,455 SANTORINI(12KV) 1, FIELDS(12KV) 575 SELLERS(12KV) 2, FITTIPALDI(12KV) 919 SILO(12KV) 1, FOYT(12KV) 1,329 SNEVA(12KV) GARLITS(12KV) 1,680 STIG(12KV) 1, GREY(12KV) 1,499 STOOGES(12KV) GRILLEY(12KV) 1,310 TERRA(12KV) GUIDANCE(12KV) 96 TULLY(12KV) 1, Grand Total 83,503 7

8 Reliability History of Circuits Serving Rancho Cucamonga (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) Rancho Cucamonga 0.0 SAIFI (average frequency of sustained interruptions) SCE SYSTEMWIDE ** Exclusions are days which utilities are allowed to MAIFI (average frequency of momentary interruptions) remove from their metrics because the outages on those days were caused by acts of nature. **Data is as of 02/20/2018, data can be slightly different due to outage data validation process 0.0 8

9 Causes of Repair Outages in Rancho Cucamonga 2017 SAIDIChart Contributions to SAIDI by Outage Cause Vegetation /Animal 0.4% Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Weather /Fire /Earthquake 18.5% Other 12.8% Operation 12.6% 3rd Party 13.8% Equipment Failure 41.9% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIDI = the cumulative amount of time the average customer is interrupted by sustained outages each year. 9

10 Causes of Repair Outages in Rancho Cucamonga 2017 SAIFIChart Contributions to SAIFI by Outage Cause Vegetation /Animal 0.2% Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Other 11.6% Weather /Fire /Earthquake 16.3% Operation 20.9% 3rd Party 19.5% Equipment Failure 31.4% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIFI = the number of times the average customer is interrupted by sustained outages each year 10

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13 Back-up Slides Reliability Histories of Circuits Serving Rancho Cucamonga Updated through Dec 2017

14 Average Reliability of 63 Circuits Serving Rancho Cucamonga CitySummary st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 63 Circuits Serving Rancho Cucamonga -- Total Customers: 83, rd Party 5% 11% 5% 10% 11% 7% 8% 5% 20% 27% 34% 50% 11% 28% 57% 15% 22% 20% 6% 7% - 14% 19% 35% Equipment Failure 83% 49% 13% 48% 29% 10% 72% 47% 43% 12% 10% 22% 67% 43% 14% 43% 38% 24% 47% 33% 17% 42% 31% 20% Operation 4% 7% 16% 14% 30% 0% 5% 9% 1% 23% 31% 4% 2% 7% 10% 21% 31% 27% 6% 14% 25% 13% 21% 15% Other 2% 22% 39% 8% 9% 28% 11% 6% 24% 4% 1% 8% 19% 21% 11% 7% 1% 14% 19% 21% 20% 13% 12% 12% Vegetation/Animal 2% 7% 15% 2% 7% 32% 4% 33% 11% 0% 0% 3% 2% 1% 8% 0% 0% 8% 0% 0% 14% 0% 0% 7% Weather/Fire/Earthquake 4% 4% 12% 18% 14% 23% 0% 0% - 34% 23% 13% % 8% 7% 21% 26% 24% 19% 16% 10% SCE SYSTEMWIDE Notes: No outages are excluded from the metrics. Outage Causes: Other: e.g., patrolled but no cause could be found Operations: e.g., urgent maintenance w/o 3-day notice to customers 3 rd Party: e.g., balloons, car hit pole, dig-in Vegetation/Animal: e.g., tree branch, rodent, or bird causing short circuit across conductors SAIDI (minutes) = the cumulative amount of time the average customer is interrupted by sustained (longer than 5 minutes) outages. SAIFI (interruptions) = the number of times the average customer is interrupted by sustained outages. MAIFI (interruptions) = the number of times the average customer is interrupted by momentary " (lasting 5 minutes or less) outages. 14

15 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 1 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ACOSTA(12KV) - Customers: 1, CircuitHistory rd Party % 100% % 72% - Equipment Failure 24% 48% % 76% - 95% 24% 100% % 4% - 42% 2% 100% Operation 1% 2% - 100% 100% - 3% 23% - 5% 76% % 5% - 3% 4% - Other 8% 3% 1% % 13% 1% 100% % 91% - 13% 22% - Vegetation/Animal % Weather/Fire/Earthquake 67% 48% 47% ALSTOT(12KV) - Customers: 1, Equipment Failure 100% 100% % 100% Operation % 100% % 100% - 100% 100% - AMETHYST(12KV) - Customers: 1, Equipment Failure 81% 76% 50% % 100% - 66% 54% - 100% 100% - 90% 73% - Operation % 85% % 34% % 20% - Other 0% 0% % % 12% % 7% - Vegetation/Animal % % 100% 100% % % Weather/Fire/Earthquake 19% 24% 1% 17% 15% ANDRETTI(12KV) - Customers: Equipment Failure % 33% Operation % 100% % 100% - Other % 67% 100% % % 15

16 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 2 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ASHFORD(12KV) - Customers: 1, rd Party % Equipment Failure 100% 100% - 100% 100% Operation % 100% % 100% - BANYAN(12KV) - Customers: 1, Equipment Failure 96% 82% - 100% 95% 50% 96% 76% 100% % 100% 100% 99% 99% 100% % 72% 51% Operation 4% 18% 100% 0% 5% - 2% 6% % 1% % 0% - Other % % Vegetation/Animal % 2% 18% Weather/Fire/Earthquake % 100% 50% 6% 27% 25% BARILLA(12KV) - Customers: 1, Equipment Failure 92% 54% - 69% 84% - 60% 10% % 58% - 94% 58% - Operation % % 90% % 6% 42% 100% 6% 42% 100% Other 8% 46% 50% Weather/Fire/Earthquake % 16% BEECHWOOD(12KV) - Customers: 1, Equipment Failure % 4% - 17% 3% - 39% 20% - 100% 100% - 87% 50% % 61% - Operation 100% 100% 100% 41% 9% - 15% 3% - 61% 80% % 50% % 8% 39% 100% Vegetation/Animal % 68% 94% 100% Weather/Fire/Earthquake % 87%

17 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 3 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI BELUSHI(12KV) - Customers: 1, rd Party % 100% % 92% - Equipment Failure % 100% Operation 70% 79% - 100% 100% % 100% 100% % 8% 100% Other % Vegetation/Animal 30% 21% 100% BENNY(12KV) - Customers: Equipment Failure % 100% Operation % 100% % 100% - BIANCO(12KV) - Customers: 1, Equipment Failure 69% 2% - 64% 69% 100% % 100% % 71% - Operation 3% 1% 100% 36% 31% % 100% - 21% 29% - Other 28% 98% BIG RIGG(12KV) - Customers: 1, rd Party 51% 73% % 100% 100% % 88% 100% Equipment Failure 46% 25% - 8% 4% % 1% - 0% 0% - Operation 1% 1% - 1% 1% % 0% % 0% - Other 1% 0% - 8% 4% - 100% 100% 100% 100% 100% % 79% - 59% 11% - Weather/Fire/Earthquake 0% 0% 100% 83% 90% % 20% - 18% 2% - 17

18 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 4 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI BOYNTON(12KV) - Customers: Equipment Failure Operation 100% 100% % 100% CAGLI(12KV) - Customers: 1, Equipment Failure 81% 51% % 99% 100% % 100% - 77% 12% % 12% - Operation 3% 0% 100% 35% 21% % 88% % 88% - Other 16% 49% Vegetation/Animal % 79% 100% 1% 1% CALABASH(12KV) - Customers: rd Party % 100% Equipment Failure 100% 100% % Operation Other % CALVO(12KV) - Customers: 1, rd Party % 1% % % Equipment Failure 3% 1% - 3% 0% - 99% 87% Operation 3% 4% 50% % 8% % 8% - Other % 98% % 3% - 100% 100% - 23% 4% - Vegetation/Animal 3% 0% 50% % 13% % % Weather/Fire/Earthquake 91% 95% % 89% 33% % 88% 33% 18

19 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 5 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI CORDON(12KV) - Customers: 2, rd Party 4% 1% Equipment Failure 96% 99% - 64% 32% % 75% 100% % 2% 100% Operation % 61% - 27% 6% % 25% % 1% - Other % % 100% % 2% - Vegetation/Animal % 94% Weather/Fire/Earthquake % 7% % 100% - 89% 95% - DANGERFIELD(12KV) - Customers: 1, rd Party % 100% % 100% - Equipment Failure 18% 2% % 100% 100% Operation Other 82% 98% DONOHUE(12KV) - Customers: 1, Equipment Failure 100% 100% 100% 89% 94% 54% 6% 83% 100% % 100% - 50% 10% - 65% 19% - Operation % 4% 3% 1% 4% 3% Other % 17% Vegetation/Animal % 6% 46% Weather/Fire/Earthquake % 86% 97% 34% 77% 97% DRONE(12KV) - Customers: 1, rd Party 99% 98% % % Equipment Failure % 100% - 100% 100% % 100% 100% % 4% 31% Operation 1% 2% % 100% % 71% - 85% 92% - Other % % 29% - 12% 4% - Weather/Fire/Earthquake %

20 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 6 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI DYNAMICS(12KV) - Customers: rd Party 100% 100% % 50% % % Equipment Failure % 50% Operation Other % EARNHARDT(12KV) - Customers: 2, Equipment Failure % 100% % 100% - 26% 50% - Operation Other % 100% 100% % 50% 100% FERON(12KV) - Customers: 1, rd Party % 100% % 100% - Equipment Failure 99% 97% 37% 45% 7% Operation % 100% % % Other % Vegetation/Animal 1% 3% - 55% 93% 100% FIELDS(12KV) - Customers: rd Party % Equipment Failure Operation 100% 100% - 100% 100%

21 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 7 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI FITTIPALDI(12KV) - Customers: rd Party % 100% Equipment Failure 100% 100% 100% % 100% % 100% - Operation 0% 0% Other % FOYT(12KV) - Customers: 1, rd Party % % 100% 100% 100% 100% % 57% 100% Equipment Failure 88% 86% % 100% Operation Other % 100% 25% Vegetation/Animal % Weather/Fire/Earthquake 12% 14% 100% % 100% % 43% - GARLITS(12KV) - Customers: 1, rd Party % 100% Equipment Failure % 100% % 100% - 56% 66% - Operation Weather/Fire/Earthquake % 100% % 34% - GREY(12KV) - Customers: 1, Equipment Failure 100% 100% - 100% 100% - 67% 6% % 100% 100% % 94% 90% Operation % 3% % 100% 100% % 6% 10% Vegetation/Animal % 30% 92%

22 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 8 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI GRILLEY(12KV) - Customers: 1, Equipment Failure 100% 100% % 50% - 96% 50% % 50% - Operation % 50% % 50% - Vegetation/Animal % 7% 50% GUIDANCE(12KV) - Customers: rd Party 82% 97% % % Equipment Failure 18% 3% - 100% 100% Operation Other % % Vegetation/Animal % GURNEY(12KV) - Customers: 1, rd Party % 78% 90% Equipment Failure Operation % 10% Other % % Vegetation/Animal 100% 100% HANKS(12KV) - Customers: Equipment Failure % 100% 100% Operation % 100% % 100% - Weather/Fire/Earthquake % % 22

23 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 9 of 16 CircuitHistory st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI HASTY(12KV) - Customers: Equipment Failure 100% 100% Operation % 100% - 100% 100% Other 0% 0% 71% - - 6% Vegetation/Animal - - 7% Weather/Fire/Earthquake % % HOPE(12KV) - Customers: Equipment Failure Operation 100% 100% JAYBIRD(12KV) - Customers: 2, rd Party % 4% % % Equipment Failure 99% 87% - 94% 70% - 34% 4% % 65% % 90% 100% 93% 89% 28% Operation 0% 7% - 2% 25% - 14% 5% % 5% 10% - 5% 9% 17% Other 1% 7% % 14% 3% % % Vegetation/Animal % 27% 87% % 35% % 2% - Weather/Fire/Earthquake % 1% KAISER(12KV) - Customers: 1, Equipment Failure % 81% 79% Operation % 100% - 19% 21% % 100% % 100% - Other %

24 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 10 of st Qtr nd Qtr rd Qtr 2017 CircuitHistory10 4th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI KENYON(12KV) - Customers: 2, Equipment Failure 100% 100% % 3% Operation Vegetation/Animal % 26% 97% LA GRANDE(12KV) - Customers: 1, rd Party % 95% 100% % 1% - 26% 35% 19% Equipment Failure 98% 99% 32% 67% 49% 100% 13% 5% - 35% 5% % 100% % 7% - Operation 0% 0% - 31% 51% - 82% 91% % 65% % 0% 1% 40% Other % 2% 0% % % 99% - 42% 57% 40% Vegetation/Animal 2% 1% % 4% % 35% % 1% - MAGOO(12KV) - Customers: 1, rd Party % 1% % % 32% - 19% 23% 100% Equipment Failure 98% 99% % 49% 100% % 64% % 2% - Operation 2% 1% % 2% - 100% 100% % 27% - Other % 72% 48% % 36% - 68% 68% - 45% 49% - MARCONI(12KV) - Customers: 2, rd Party % % Equipment Failure 86% 60% 100% 70% 24% - 100% 100% 75% Operation 7% 9% - 30% 76% % 89% % 89% - Other 7% 31% % Vegetation/Animal % % % % Weather/Fire/Earthquake % 11% 50% % 11% 37% 24

25 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 11 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory11 SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI MARX(12KV) - Customers: 1, Equipment Failure Operation % 100% % 100% % 100% - MEARS(12KV) - Customers: 1, Equipment Failure % 100% Operation 100% 100% 100% METRO(12KV) - Customers: 2, rd Party % % % Equipment Failure % 14% - 92% 50% - 100% 100% 82% % 2% % 22% 31% Operation 100% 100% - 44% 86% - 8% 50% % 100% 45% 80% 98% 100% % 78% 42% Vegetation/Animal % % PATRON(12KV) - Customers: Equipment Failure % 87% - 100% 100% Operation % 13% 100% % 100% % 100% - 25

26 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 12 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI CircuitHistory12 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI PEBBLE(12KV) - Customers: 2, Equipment Failure 33% 3% - 75% 50% % 100% 100% 100% 100% % 100% 100% Operation 53% 38% 100% 25% 50% Other 13% 59% PREGO(12KV) - Customers: 1, rd Party % Equipment Failure 90% 48% 1% % 83% % 82% % 46% - Operation 7% 4% 99% % 17% - 100% 100% - 3% 18% % 100% - 27% 54% - Other 4% 47% PRYOR(12KV) - Customers: 2, Equipment Failure % Operation RAHAL(12KV) - Customers: 1, Equipment Failure % 99% % 100% % 100% - Operation % 1% Other % % Weather/Fire/Earthquake % 100% 100%

27 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 13 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory13 SAIFI MAIFI SAIDI SAIFI MAIFI REDWOOD(12KV) - Customers: 1, rd Party 33% 44% % % 100% 100% % % 9% 97% Equipment Failure 67% 56% 2% % % 50% 0% 66% 49% 88% 55% 45% 2% Operation % 100% % 50% 0% 34% 51% 12% 26% 45% 1% Other % % % 100% % 1% - ROSSI(12KV) - Customers: 1, Equipment Failure 4% 0% - 100% 100% - 100% 100% % 100% - 100% 100% - Operation Other 10% 30% 30% Vegetation/Animal 86% 70% 70% RUTHERFORD(12KV) - Customers: rd Party 100% 100% Equipment Failure Operation % 100% RUTTMAN(12KV) - Customers: 1, Equipment Failure % 100% 100% Operation % 0%

28 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 14 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory14 SAIFI MAIFI SAIDI SAIFI MAIFI SANTORINI(12KV) - Customers: 1, Equipment Failure 52% 4% - 71% 5% - 97% 68% - 56% 61% % 100% % 84% - Operation 35% 34% 96% 25% 93% - 3% 32% % 20% - 3% 2% - Other 13% 62% 4% 4% 2% 100% % 39% % 4% - Vegetation/Animal % 100% % 80% - 6% 10% - SELLERS(12KV) - Customers: 2, Equipment Failure % 75% Operation % 25% % 100% % 100% - SILO(12KV) - Customers: 1, rd Party 99% 97% 41% % 4% 100% % % 80% % 80% 67% Equipment Failure % 93% Operation 1% 3% % 3% % 20% % 20% - Other % % % SNEVA(12KV) - Customers: rd Party % 99% - 99% 99% - 100% 100% % 100% - Equipment Failure % 1% Operation % 1% 100% Other %

29 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 15 of st Qtr nd Qtr rd Qtr th Qtr SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI CircuitHistory15 SAIFI MAIFI SAIDI SAIFI MAIFI STIG(12KV) - Customers: 1, rd Party % % Equipment Failure % 100% 100% % 91% 65% Operation % 100% - 22% 9% - STOOGES(12KV) - Customers: Equipment Failure Operation % 100% TERRA(12KV) - Customers: Equipment Failure 100% 100% 30% 80% 16% - 100% 100% % 100% - 89% 50% % 84% - Operation % 84% % 50% % 16% - Other % % % % TULLY(12KV) - Customers: 1, rd Party 63% 57% 44% % 92% - 100% 100% 100% % 75% 43% Equipment Failure % 3% % 63% % 15% - Operation 33% 41% 13% % 33% % 7% - Other % % % % % Vegetation/Animal 3% 2% - 100% 100% 5% % 5% % 4% 11% % 3% 6% 29

30 Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 16 of st Qtr nd Qtr rd Qtr th Qtr CircuitHistory16 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI UNSER(12KV) - Customers: 1, rd Party % 31% 50% % 90% 100% 96% 74% % 47% 100% Equipment Failure % 64% - 70% 18% - 2% 7% - 42% 4% % 2% - Operation 90% 92% - 1% 1% - 28% 76% - 98% 93% - 10% 6% % 100% - 28% 51% - Other 3% 3% - 11% 3% 50% Vegetation/Animal 6% 4% - 0% 0% - 2% 5% % 26% % 0% - Weather/Fire/Earthquake % 0% - 0% 0% - YARBOROUGH(12KV) - Customers: Equipment Failure 100% 100% % 98% % 98% - Operation % 2% % 2% - ZINSER(12KV) - Customers: 1, rd Party % 100% Equipment Failure Operation % 100%