Circuit Reliability Review

Circuit Reliability Review Riverside District 2 January 2018

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 (2017-19). 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

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

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

Cities in the Ontario, Foothill, Menifee, Redlands District CityList1 ANAHEIM BANNING BEAUMONT BLOOMINGTON BOX SPRINGS MOUNTAIN CALIMESA CHERRY VALLEY CHINO CHINO HILLS COLTON CORONA EAST HEMET EASTVALE EL CERRITO FONTANA GLEN AVON GOOD HOPE GRAND TERRACE HEMET HIGHGROVE HIGHLAND HOME GARDENS HOMELAND IDYLLWILD-PINE COVE JUNIPER FLATS JURUPA VALLEY LAKEVIEW LOMA LINDA MARCH AFB MEADOWBROOK MENIFEE MENTONE MIRA LOMA MONTCLAIR MORENO VALLEY MOUNTAIN CENTER MUSCOY NORCO NUEVO ONTARIO PEDLEY PERRIS RANCHO CUCAMONGA REDLANDS RIALTO RIVERSIDE RUBIDOUX SAN ANTONIO HEIGHTS SAN BERNARDINO SAN JACINTO SUNNYSLOPE 5

* 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

Overview of Riverside District 2 CircuitList1 There are 41 circuits that serve Riverside District 2 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ARLINGTON(12KV) 1,013 PORPHYRY(33KV) 8 - - BIGGS(4.16KV) 74 PRESTON(12KV) 1,904 - - BOBBIT(12KV) 1,549 RETREAT(12KV) 550 - - BOHEMIA(12KV) 1,469 SERFAS(12KV) 114 - - BOLLERO(12KV) 1,527 SEVAINE(12KV) 1,868 - - CERAMIC(4.16KV) 375 SNIPES(12KV) 2,122 - - CHIMAY(12KV) 1,109 STROH(4.16KV) 156 - - CONESTOGA(12KV) 1,171 URBITA(12KV) 1,793 - - CORONITA(12KV) 2,412 WEIRICK(12KV) 968 - - DIPLOMAT(12KV) 1,021 WHISPER(12KV) 146 - - DOMIC(12KV) 1,439 WYLE(12KV) 1,734 - - FLEETWOOD(12KV) 325 - - - FORTRESS(12KV) 2,415 - - - GALENA(12KV) 1,713 - - - GLOBE MILLS(12KV) 930 - - - GUINNESS(12KV) 1,320 - - - HARLOW(12KV) 698 - - - HIGHBALL(12KV) 1,629 - - - INTERPACE(33KV) 8 - - - KINGSFORD(12KV) 894 - - - LA SIERRA(12KV) 350 - - - LAST(12KV) 1,338 - - - LESTER(12KV) 1,585 - - - NEW CASTLE(12KV) 842 - - - ONBORD(12KV) 1,345 - - - OWENS(33KV) 16 - - - PALACE(12KV) 689 - - - PLACID(12KV) 3,200 - - - POLYMER(12KV) 27 - - - PORCELAIN(4.16KV) 95 - - - Grand Total 43,941 7

Reliability History of Circuits Serving Riverside District 2 (No Exclusions) BarChart 250.0 2014 2015 2016 2017 SAIDI (average minutes of sustained interruptions) 200.0 150.0 100.0 50.0 0.0 135.3 112.1 114.8 88.7 171.2 194.9 134.5 139.7 Riverside District 2 SAIFI (average frequency of sustained interruptions) MAIFI (average frequency of momentary interruptions) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 2.0 1.5 1.0 0.5 0.0 1.4 1.4 1.3 1.0 0.8 0.9 1.4 1.4 1.1 1.2 1.1 1.6 1.5 1.3 1.2 1.8 SCE SYSTEMWIDE ** Exclusions are days which utilities are allowed to 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 8

Causes of Repair Outages in Riverside District 2 2017 SAIDIChart Contributions to SAIDI by Outage Cause Vegetation /Animal 0.5% 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 2.4% Operation 9.6% Weather /Fire /Earthquake 17.7% 3rd Party 17.2% Equipment Failure 52.6% 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

Causes of Repair Outages in Riverside District 2 2017 SAIFIChart Contributions to SAIFI by Outage Cause Vegetation /Animal 1.6% 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 10.0% Operation 17.2% Weather /Fire /Earthquake 11.2% 3rd Party 19.5% Equipment Failure 40.5% 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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Back-up Slides Reliability Histories of Circuits Serving Riverside District 2 Updated through Dec 2017

Average Reliability of 41 Circuits Serving Riverside District 2 CitySummary 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 41 Circuits Serving Riverside District 2 -- Total Customers: 43,941 135.3 1.4 1.4 88.7 0.8 1.1 171.2 1.3 1.2 22.2 0.2 0.4 16.7 0.2 0.3 100.2 0.7 0.4 55.8 0.4 0.2 194.9 1.5 1.3 3rd Party 21% 23% 23% 27% 36% 27% 10% 8% 7% 39% 34% 19% 18% 23% 13% 2% 4% 14% 35% 38% 45% 17% 19% 21% Equipment Failure 45% 41% 16% 50% 34% 23% 31% 23% 23% 31% 43% 33% 74% 62% 36% 54% 40% 8% 53% 31% 24% 53% 41% 24% Operation 9% 15% 3% 8% 11% 5% 16% 10% 3% 3% 2% 0% 6% 4% - 11% 21% 17% 11% 23% - 10% 17% 5% Other 10% 9% 34% 4% 6% 35% 27% 37% 34% 6% 7% 19% 1% 0% 49% 3% 15% 40% 1% 8% 16% 2% 10% 30% Vegetation/Animal 0% 0% 0% - - 5% - - 2% 4% 2% 28% 1% 11% 2% - - - - - 7% 1% 2% 10% Weather/Fire/Earthquake 15% 12% 24% 11% 13% 4% 16% 22% 30% 16% 13% 2% - - - 31% 20% 21% - - 9% 18% 11% 9% SCE SYSTEMWIDE 112.1 1.0 1.4 114.8 0.9 1.4 134.5 1.1 1.6 42.6 0.3 0.5 23.6 0.2 0.4 29.2 0.2 0.4 44.3 0.4 0.5 139.7 1.2 1.8 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

Reliability Histories for Individual Circuits Serving Riverside District 2-1 of 11 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ARLINGTON(12KV) - Customers: 1,013 4.4 0.1-16.7 0.1-35.2 0.1 - - - CircuitHistory - - - - 69.9 1.3 - - - - 69.9 1.3-3rd Party - - - 22% 67% - - - - - - 1- - - - - - - - - - - - - Equipment Failure - - - 77% 16% - 3% 10% - - - - - - - - - - - - - - - - Operation 14% 15% - 1% 16% - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - 94% 95% - - - - 94% 95% - Weather/Fire/Earthquake 86% 85% - - - - 97% 90% - - - - - - - 6% 5% - - - - 6% 5% - BIGGS(4.16KV) - Customers: 74 - - - 169.5 1.1 4.0 186.7 2.0 1.0 94.1 1.0 1.0 142.2 2.0 1.0 35.0 0.0-709.5 5.0 1.0 980.9 8.0 3.0 3rd Party - - - - - 25% - - 100% 100% 100% - - - - - - - - - - 10% 12% - Equipment Failure - - - 100% 100% - 40% 49% - - - - 100% 99% - 100% 100% - 98% 80% 100% 89% 75% 32% Operation - - - - - - - - - - - - 0% 1% - - - - - - - 0% 0% - Other - - - - - 75% 60% 51% - - - 100% - - 100% - - - 2% 20% - 1% 13% 68% BOBBIT(12KV) - Customers: 1,549 193.7 2.0-98.6 2.1 1.0 396.3 2.1 1.1 175.8 1.1-1.1 0.0-0.7 0.0 - - - - 177.6 1.1-3rd Party - - - 75% 52% - - - - 92% 93% - - - - - - - - - - 91% 92% - Equipment Failure 96% 97% - 15% 2% - 3% 2% - - - - 100% 100% - 100% 100% - - - - 1% 0% - Operation 4% 3% - 10% 47% - 1% 5% 100% 3% 4% - - - - - - - - - - 3% 3% - Other - - - - - 100% 91% 91% - 5% 4% - - - - - - - - - - 5% 4% - Weather/Fire/Earthquake - - - - - - 4% 2% - - - - - - - - - - - - - - - - BOHEMIA(12KV) - Customers: 1,469 130.1 1.4 2.0 17.2 0.1 1.0 112.4 1.0 - - - - - - - 50.3 2.0 - - - - 50.3 2.0-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 21% 3% - 48% 28% 100% 31% 5% - - - - - - - 63% 2% - - - - 63% 2% - Operation 19% 8% - 52% 72% - - - - - - - - - - - - - - - - - - - Other - - - - - - 69% 95% - - - - - - - 37% 98% - - - - 37% 98% - Weather/Fire/Earthquake 59% 90% 100% - - - - - - - - - - - - - - - - - - - - - 15

Reliability Histories for Individual Circuits Serving Riverside District 2-2 of 11 CircuitHistory 2 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 2017 BOLLERO(12KV) - Customers: 1,527 454.0 3.4 0.6 91.3 0.3-73.5 0.1-66.8 0.1 0.8 - - 0.2 46.6 0.1 - - - - 113.4 0.2 0.9 3rd Party 16% 27% 32% - - - - - - - - - - - 100% - - - - - - - - 19% Equipment Failure 72% 67% 68% 98% 87% - 99% 83% - 97% 94% 98% - - - 100% 100% - - - - 98% 97% 79% Operation 12% 6% - 2% 13% - 1% 17% - 3% 6% 2% - - - - - - - - - 2% 3% 2% Other 0% 0% - - - - - - - - - - - - - - - - - - - - - - CERAMIC(4.16KV) - Customers: 375 165.9 2.0 3.0 207.8 2.0 2.0 1825.4 3.6 1.9 94.9 1.0-34.0 1.0-252.5 6.0-840.8 4.0-1222.2 12.0-3rd Party - - 33% - - - - - - 100% 100% - - - - - - - - - - 8% 8% - Equipment Failure - - - 55% 50% - 9% 31% - - - - 100% 100% - 13% 50% - 91% 75% - 68% 58% - Operation - - - - - - 89% 44% - - - - - - - - - - 9% 25% - 6% 8% - Other 100% 100% 67% - - 100% 2% 26% 50% - - - - - - 9% 17% - - - - 2% 8% - Weather/Fire/Earthquake - - - 45% 50% - - - 50% - - - - - - 78% 33% - - - - 16% 17% - CHIMAY(12KV) - Customers: 1,109 60.5 1.2 1.0 35.4 0.1-411.9 3.3 0.9 - - - 43.6 0.3 3.6 14.3 1.0 - - - 1.0 57.9 1.3 4.6 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 95% 91% 100% 38% 10% - 80% 67% 100% - - - 100% 100% 100% 100% 100% - - - 100% 100% 100% 100% Operation 5% 9% - 62% 90% - - - - - - - - - - - - - - - - - - - Other - - - - - - 20% 33% - - - - - - - - - - - - - - - - CONESTOGA(12KV) - Customers: 1,171 206.1 2.2 1.0 118.1 1.9 0.2 375.8 5.7 3.6 - - - 36.4 1.9 1.2 - - 1.1 182.9 1.0-219.3 2.9 2.3 3rd Party 13% 45% 100% - - - 60% 17% - - - - - - - - - - 100% 100% - 83% 34% - Equipment Failure 83% 53% - 1% 0% - 8% 3% - - - - 84% 52% - - - - - - - 14% 34% - Operation 3% 2% - 5% 4% - 25% 19% - - - - 2% 6% - - - - - - - 0% 4% - Other - - - 94% 96% 100% 6% 44% 44% - - - - - 83% - - 100% - - - - - 91% Vegetation/Animal - - - - - - - - 29% - - - 13% 42% 17% - - - - - - 2% 27% 9% Weather/Fire/Earthquake - - - - - - 2% 17% 27% - - - - - - - - - - - - - - - 16

Reliability Histories for Individual Circuits Serving Riverside District 2-3 of 11 CircuitHistory 3 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI CORONITA(12KV) - Customers: 2,412 42.9 0.4-57.9 0.4-156.7 1.0 2.4 0.1 0.0 - - - - 22.6 0.1 - - - - 22.7 0.1-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 79% 56% - 32% 12% - 95% 92% 54% - - - - - - 100% 100% - - - - 100% 99% - Operation 21% 44% - 68% 88% - 5% 8% 1% 100% 100% - - - - - - - - - - 0% 1% - Other - - - - - - - - 45% - - - - - - - - - - - - - - - DIPLOMAT(12KV) - Customers: 1,021 102.6 1.2-12.5 0.0-87.2 0.5 - - - - - - - - - - - - - - - - 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 100% 99% - - - - - - - - - - - - - - - - Operation 100% 100% - 100% 100% - 0% 1% - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - DOMIC(12KV) - Customers: 1,439 446.0 3.0 2.6 107.7 1.8 2.9 352.0 3.1 9.6 8.0 0.0-98.1 0.8 2.6 151.6 2.0 1.0 55.8 1.0 0.8 313.5 3.9 4.4 3rd Party - - - - - 34% 0% 0% 8% - - - - - 31% - - - - - 100% - - 37% Equipment Failure 7% 12% - 83% 99% 38% 0% 0% - 17% 27% - 100% 100% - - - - - - - 32% 21% - Operation 4% 34% - 0% 0% - - - - 83% 73% - - - - 14% 50% - 100% 100% - 27% 53% - Other - - 69% - - - 58% 64% 39% - - - - - 69% - - - - - - - - 41% Weather/Fire/Earthquake 89% 54% 31% 16% 1% 28% 41% 36% 52% - - - - - - 86% 50% 100% - - - 42% 26% 22% FLEETWOOD(12KV) - Customers: 325 75.4 1.0 4.0 10.3 0.0 1.0 130.2 3.0 1.0 54.0 2.0 3.6 20.2 0.0-49.6 1.0 1.0 3.8 0.0-127.6 3.0 4.6 3rd Party 65% 3% 25% - - - 89% 34% - - - - - - - 100% 100% - - - - 39% 33% - Equipment Failure 1% 0% - 100% 100% - 6% 33% 100% 100% 100% 72% 37% 50% - - - - - - - 48% 65% 57% Operation - - - - - - - - - - - - - - - - - - 100% 100% - 3% 1% - Other - - 75% - - - 5% 33% - - - 28% 63% 50% - - - 100% - - - 10% 1% 43% Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 34% 97% - - - - - - - - - - - - - - - - - - - - - - 17

Reliability Histories for Individual Circuits Serving Riverside District 2-4 of 11 CircuitHistory 4 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI FORTRESS(12KV) - Customers: 2,415 276.1 5.3 2.9 107.4 1.4 1.0 22.2 0.3 0.9 8.5 0.0 1.0 5.9 0.0-2.1 0.0-48.7 0.6-65.1 0.7 1.0 3rd Party 29% 34% 29% 90% 95% 71% 47% 48% - 58% 14% - - - - - - - - - - 8% 1% - Equipment Failure 22% 39% 35% 0% 0% - 21% 1% 100% 22% 34% 100% - - - 2% 2% - - - - 3% 1% 100% Operation 0% 0% - 6% 5% 29% - - - 20% 52% - 100% 100% - 98% 98% - 94% 99% - 85% 97% - Other 42% 19% 29% 4% 0% - - - - - - - - - - - - - 6% 1% - 5% 1% - Weather/Fire/Earthquake 6% 7% 7% - - - 32% 50% - - - - - - - - - - - - - - - - GALENA(12KV) - Customers: 1,713 128.6 0.3 2.0 56.5 1.0 3.0 338.3 2.1 1.9 58.1 1.0 - - - - - - - 124.7 1.0-182.8 2.0-3rd Party - - - - - 33% - - - - - - - - - - - - - - - - - - Equipment Failure 92% 72% 1% 100% 100% - 84% 60% - 100% 100% - - - - - - - 100% 100% - 100% 100% - Operation 8% 28% 50% - - - 4% 6% - - - - - - - - - - - - - - - - Other - - 50% - - 67% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 12% 34% 100% - - - - - - - - - - - - - - - GLOBE MILLS(12KV) - Customers: 930 125.3 2.0 2.0 89.0 1.0-184.1 2.1 1.0 13.4 0.0-23.6 0.1-91.1 1.7 - - - 1.0 128.0 1.8 1.0 3rd Party 86% 50% 100% - - - 52% 48% - - - - - - - - - - - - - - - - Equipment Failure 5% 0% - 99% 99% - 48% 51% - 78% 46% - - - - 56% 6% - - - - 48% 7% - Operation 9% 49% - 1% 1% - 0% 1% - 22% 54% - 100% 100% - 12% 34% - - - - 29% 38% - Other - - - - - - - - 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - - 32% 60% - - - 100% 23% 55% 100% GUINNESS(12KV) - Customers: 1,320 38.8 0.1 1.0 21.1 0.2-25.1 0.2 1.0 38.9 0.7 0.3 - - - - - - - - - 38.9 0.7 0.3 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 67% 25% - 62% 74% - - - - - - - - - - - - - - - - - - - Operation 33% 75% - 38% 26% - 100% 100% - 2% 1% - - - - - - - - - - 2% 1% - Other - - 100% - - - - - 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - 98% 99% 100% - - - - - - - - - 98% 99% 100% 18

Reliability Histories for Individual Circuits Serving Riverside District 2-5 of 11 CircuitHistory 5 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI HARLOW(12KV) - Customers: 698 4.8 0.0-0.9 0.0-196.3 1.1 - - - - 0.7 0.0-85.6 2.1-26.0 1.0 1.0 112.3 3.2 1.0 3rd Party - - - 100% 100% - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - - - - - - - - - - - 87% 53% - - - - 66% 36% - Operation - - - - - - 40% 10% - - - - 100% 100% - - - - - - - 1% 0% - Other - - - - - - 60% 90% - - - - - - - - - - 100% 100% - 23% 32% - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - 100% - - 100% Weather/Fire/Earthquake - - - - - - - - - - - - - - - 13% 47% - - - - 10% 32% - HIGHBALL(12KV) - Customers: 1,629 191.7 1.1 2.0 104.5 1.1 1.0 212.1 1.0-1.9 0.0 1.0 4.2 0.0-794.5 1.2 0.5 349.2 1.1-1149.9 2.2 1.5 3rd Party 95% 95% - 69% 89% - 93% 97% - - - - - - - - - - 94% 95% - 29% 45% - Equipment Failure 1% 1% - 29% 10% - 0% 0% - 100% 100% - 100% 100% - 100% 100% 100% 1% 0% - 70% 53% 35% Operation 2% 3% - 3% 1% - - - - - - - - - - 0% 0% - 5% 5% - 2% 2% - Other - - 49% - - 100% 7% 2% - - - - - - - - - - - - - - - - Vegetation/Animal 0% 0% - - - - - - - - - 100% - - - - - - - - - - - 65% Weather/Fire/Earthquake 2% 0% 51% - - - - - - - - - - - - - - - - - - - - - INTERPACE(33KV) - Customers: 8 - - 3.9 2779.6 3.0 2.0 735.3 2.6 4.1 95.0 1.0-114.0 2.0 1.0 296.0 5.0-177.5 2.0 1.0 682.5 10.0 2.0 3rd Party - - 26% 4% 33% - - - - 100% 100% - 70% 50% - - - - - - - 26% 20% - Equipment Failure - - - 4% 33% 50% 54% 16% - - - - 30% 50% 100% 11% 60% - 100% 100% 100% 36% 60% 100% Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - 48% 92% 33% 50% 19% 79% 73% - - - - - - 9% 20% - - - - 4% 10% - Vegetation/Animal - - 26% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 27% 5% 27% - - - - - - 80% 20% - - - - 35% 10% - KINGSFORD(12KV) - Customers: 894 24.8 0.0-10.0 0.1 - - - 1.0 - - - 7.3 0.0 - - - - - - - 7.3 0.0-3rd Party - - - 4% 1% - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - - - - - - - - - - - - - - - - - - - - Operation - - - 96% 99% - - - - - - - 100% 100% - - - - - - - 100% 100% - Other - - - - - - - - 100% - - - - - - - - - - - - - - - 19

Reliability Histories for Individual Circuits Serving Riverside District 2-6 of 11 CircuitHistory 6 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI LA SIERRA(12KV) - Customers: 350 189.6 2.7 - - - 2.0 286.7 2.1 - - - - - - - - - - - - - - - - 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 46% 63% - - - 50% - - - - - - - - - - - - - - - - - - Operation 54% 38% - - - - - - - - - - - - - - - - - - - - - - Other - - - - - 50% 18% 47% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 82% 53% - - - - - - - - - - - - - - - - LAST(12KV) - Customers: 1,338 135.8 1.1 0.0 109.0 1.2-78.7 1.0 - - - - 51.6 0.0-7.3 1.0-0.3 0.0-59.1 1.0-3rd Party - - - 83% 85% - - - - - - - - - - - - - - - - - - - Equipment Failure 99% 99% 100% - - - - - - - - - 100% 100% - - - - - - - 87% 4% - Operation 1% 1% - 17% 15% - 1% 1% - - - - - - - 100% 100% - 100% 100% - 13% 96% - Other - - - - - - 99% 99% - - - - - - - - - - - - - - - - LESTER(12KV) - Customers: 1,585 4.7 0.1-83.9 0.7 0.4 5.3 0.0 0.9 - - - 8.5 0.0-1.6 0.1 - - - - 10.0 0.1-3rd Party - - - 60% 84% 100% - - - - - - - - - - - - - - - - - - Equipment Failure - - - 31% 7% - - - - - - - 100% 100% - - - - - - - 85% 34% - Operation 100% 100% - 9% 9% - 100% 100% - - - - - - - 100% 100% - - - - 15% 66% - Other - - - - - - - - 100% - - - - - - - - - - - - - - - NEW CASTLE(12KV) - Customers: 842 78.4 1.2-17.3 0.1 0.9 11.5 0.0 1.0 7.0 1.0 1.0 - - - - - - 8.7 1.0-15.7 2.0 1.0 3rd Party 3% 1% - - - 100% - - - - - - - - - - - - 100% 100% - 55% 50% - Equipment Failure 37% 12% - 100% 100% - 100% 100% - 100% 100% 100% - - - - - - - - - 45% 50% 100% Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake 60% 87% - - - - - - - - - - - - - - - - - - - - - - 20

Reliability Histories for Individual Circuits Serving Riverside District 2-7 of 11 CircuitHistory 7 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ONBORD(12KV) - Customers: 1,345 203.9 0.3 0.3 76.2 0.1 2.2 159.0 2.1 1.1 22.7 0.1 - - - - 330.4 1.0-47.8 0.3 1.0 401.0 1.4 1.0 3rd Party - - - - - 100% - - - - - - - - - - - - - - - - - - Equipment Failure 62% 34% 10% 96% 56% - 25% 1% 94% - - - - - - 100% 100% - 95% 83% 100% 94% 91% 100% Operation 15% 30% - 4% 44% - 17% 50% - - - - - - - - - - 3% 14% - 0% 3% - Other 16% 3% 80% - - - 55% 48% 5% - - - - - - - - - 2% 2% - 0% 1% - Vegetation/Animal 6% 34% 11% - - - - - - 89% 61% - - - - - - - - - - 5% 3% - Weather/Fire/Earthquake - - - - - - 2% 0% 1% 11% 39% - - - - - - - - - - 1% 2% - OWENS(33KV) - Customers: 16 358.8 1.5-383.3 2.1 3.8 278.3 2.6 1.0 - - 1.1 277.0 3.1 2.1 - - - 690.6 3.3 0.2 967.6 6.3 3.4 3rd Party - - - 44% 44% 21% - - 100% - - 6% - - - - - - - - - - - 2% Equipment Failure 87% 90% - 56% 56% - 26% 38% - - - - 100% 100% 26% - - - 98% 69% 100% 99% 84% 22% Operation - - - - - - 13% 24% - - - - - - - - - - - - - - - - Other 13% 10% - - - 79% 62% 38% - - - 94% - - 74% - - - 2% 31% - 1% 16% 76% PALACE(12KV) - Customers: 689 214.4 1.1-87.5 1.6 1.0 23.4 1.1 1.0 - - - - - - - - - 14.0 1.0 1.0 14.0 1.0 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - 100% - - 100% Equipment Failure 100% 100% - 99% 98% - - - - - - - - - - - - - - - - - - - Operation - - - 1% 2% - 43% 5% - - - - - - - - - - 100% 100% - 100% 100% - Other - - - - - 100% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 57% 95% 100% - - - - - - - - - - - - - - - PLACID(12KV) - Customers: 3,200 254.0 2.9 2.1 225.9 2.3 5.8 72.7 0.3 0.1 15.0 0.1 2.1 0.6 0.0-86.3 1.0 0.4 1.2 0.0-103.0 1.2 2.4 3rd Party 40% 26% - 20% 14% 5% - - - - - 48% 100% 100% - - - - - - - 1% 0% 41% Equipment Failure 45% 46% - 21% 32% 32% 25% 23% - 3% 1% 6% - - - 98% 99% 34% 100% 100% - 84% 87% 10% Operation 10% 18% - - - 17% 75% 77% - - - - - - - 2% 1% - - - - 2% 1% - Other - - 9% - - 21% - - 100% 71% 79% - - - - - - 66% - - - 10% 10% 9% Vegetation/Animal - - - - - 17% - - - 25% 20% 47% - - - - - - - - - 4% 2% 40% Weather/Fire/Earthquake 6% 11% 91% 59% 54% 8% - - - - - - - - - - - - - - - - - - 21

Reliability Histories for Individual Circuits Serving Riverside District 2-8 of 11 CircuitHistory 8 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI POLYMER(12KV) - Customers: 27 45.4 0.1 1.2 469.6 2.0 2.6 46.8 1.0 1.0 97.7 1.0-33.7 1.0-255.4 5.9-1019.5 5.0-1406.3 12.9-3rd Party - - 100% 76% 50% 24% - - - 100% 100% - - - - - - - - - - 7% 8% - Equipment Failure - - - 24% 50% - - - - - - - 100% 100% - 13% 50% - 93% 80% - 72% 62% - Operation - - - - - - - - - - - - - - - - - - 7% 20% - 5% 8% - Other 100% 100% - - - 76% 100% 100% - - - - - - - 9% 17% - - - - 2% 8% - Weather/Fire/Earthquake - - - - - - - - 100% - - - - - - 78% 33% - - - - 14% 15% - PORCELAIN(4.16KV) - Customers: 95 39.9 1.1 0.9 216.0 2.0 4.9 49.0 1.0 4.0 94.7 1.0-55.2 1.0-268.1 6.0-827.9 3.9-1245.9 11.9-3rd Party - - 100% - - - - - - 100% 100% - - - - - - - - - - 8% 8% - Equipment Failure - - - 100% 100% - - - - - - - 100% 100% - 18% 50% - 91% 75% - 69% 59% - Operation - - - - - - - - - - - - - - - - - - 9% 25% - 6% 8% - Other 100% 100% - - - 100% 100% 100% 75% - - - - - - 8% 17% - - - - 2% 8% - Weather/Fire/Earthquake - - - - - - - - 25% - - - - - - 73% 33% - - - - 16% 17% - PORPHYRY(33KV) - Customers: 8 - - - - - 5.8 432.9 1.4 - - - - - - - - - - - - - - - - 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - 65% 19% 73% - - - - - - - - - - - - - - - - Operation - - - - - - 81% 27% - - - - - - - - - - - - - - - - Other - - - - - 35% - - - - - - - - - - - - - - - - - - PRESTON(12KV) - Customers: 1,904 271.7 4.1 4.9 45.4 0.1 0.4 202.2 1.2 - - - - 62.8 1.0-762.2 2.1 2.8 5.1 0.0-830.0 3.1 2.8 3rd Party 64% 48% 100% - - - - - - - - - 100% 100% - 6% 25% 45% - - - 13% 49% 45% Equipment Failure 3% 1% - 94% 36% - 100% 100% - - - - - - - 1% 1% - 100% 100% - 1% 1% - Operation 6% 26% - 6% 64% - - - - - - - - - - 25% 25% 18% - - - 23% 17% 18% Other 27% 25% - - - 100% - - - - - - - - - - - 37% - - - - - 37% Weather/Fire/Earthquake - - - - - - - - - - - - - - - 69% 50% - - - - 63% 34% - 22

Reliability Histories for Individual Circuits Serving Riverside District 2-9 of 11 CircuitHistory 9 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI RETREAT(12KV) - Customers: 550 - - - 207.8 2.0 4.0 191.9 2.0 1.0 113.2 1.0 1.0 140.0 2.0 1.0 - - - 810.6 3.0-1063.9 6.0 2.0 3rd Party - - - 36% 50% 25% - - 100% 83% 96% - - - - - - - - - - 9% 16% - Equipment Failure - - - 64% 50% - 39% 49% - 17% 4% - 100% 100% - - - - 98% 67% - 90% 67% - Operation - - - 1% 1% - 4% 2% - - - - - - - - - - - - - - - - Other - - - - - 75% 57% 49% - - - 100% - - 100% - - - 2% 33% - 1% 17% 100% SERFAS(12KV) - Customers: 114 - - - - - - - - - 90.2 1.0 - - - - - - - - - - 90.2 1.0-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - 100% 100% - - - - - - - - - - 100% 100% - SEVAINE(12KV) - Customers: 1,868 54.7 1.1 3.8 44.4 0.1 1.0 359.0 2.5 1.0 28.6 0.0-1.3 0.0-17.4 0.9-21.1 0.7 1.7 68.4 1.7 1.7 3rd Party - - - - - - 0% 0% - - - - - - - - - - 97% 100% 45% 30% 44% 45% Equipment Failure 97% 99% 48% 54% 43% 100% 14% 5% - 100% 100% - - - - 100% 100% - - - - 67% 56% - Operation 3% 1% - 46% 57% - 4% 3% - - - - 100% 100% - - - - 3% 0% - 3% 0% - Other - - 52% - - - 73% 83% - - - - - - - - - - - - 55% - - 55% Weather/Fire/Earthquake - - - - - - 9% 9% 100% - - - - - - - - - - - - - - - SNIPES(12KV) - Customers: 2,122 2.0 0.0 2.0 101.1 1.2 1.1 94.1 1.1-49.4 0.1 1.0 - - - 8.9 1.0 1.0 - - - 58.4 1.1 2.0 3rd Party - - - 95% 96% - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation 100% 100% - 5% 4% - 7% 5% - - - - - - - 100% 100% - - - - 15% 94% - Other - - 100% - - 100% - - - - - 100% - - - - - 100% - - - - - 100% Weather/Fire/Earthquake - - - - - - 93% 95% - 100% 100% - - - - - - - - - - 85% 6% - 23

Reliability Histories for Individual Circuits Serving Riverside District 2-10 of 11 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 CircuitHistory10 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI STROH(4.16KV) - Customers: 156 76.5 1.0 1.0 116.3 1.0 1.9 58.1 1.2 3.2 95.5 1.0 1.0 128.5 2.0-253.8 6.0-342.4 2.0-820.2 11.0 1.0 3rd Party - - 100% - - - - - - 100% 100% - 64% 50% - - - - - - - 22% 18% - Equipment Failure - - - 100% 100% - - - - - - - 36% 50% - 13% 50% - 100% 100% - 51% 55% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - 100% 100% 100% 63% - - 100% - - - 9% 17% - - - - 3% 9% 100% Weather/Fire/Earthquake 100% 100% - - - - - - 37% - - - - - - 78% 33% - - - - 24% 18% - URBITA(12KV) - Customers: 1,793 76.3 1.0 1.0 45.7 1.0 2.0 2.9 0.0 3.0 - - - - - - 0.2 0.0 2.1 25.8 0.0-26.0 0.0 2.1 3rd Party - - - - - 50% - - 33% - - - - - - - - - - - - - - - Equipment Failure 95% 97% 100% 13% 1% 50% - - 67% - - - - - - - - - 100% 100% - 99% 97% - Operation 1% 1% - - - - - - - - - - - - - - - 48% - - - - - 48% Other 5% 2% - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 87% 99% - 100% 100% - - - - - - - 100% 100% 52% - - - 1% 3% 52% WEIRICK(12KV) - Customers: 968 1.9 0.0-7.6 0.1 1.0 - - - - - - - - 1.0 0.2 0.0 - - - - 0.2 0.0 1.0 3rd Party - - - 100% 100% 100% - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - - - - - - - - - - - 100% 100% - - - - 100% 100% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - 100% - - - - - - - - 100% WHISPER(12KV) - Customers: 146 3.4 0.0 - - - - 573.9 4.3 0.9 - - - - - - - - - 102.9 1.0 0.1 102.9 1.0 0.1 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 25% 44% 100% - - - - - - - - - 100% 100% 100% 100% 100% 100% Operation 100% 100% - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 75% 56% - - - - - - - - - - - - - - - - 24

Reliability Histories for Individual Circuits Serving Riverside District 2-11 of 11 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 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 WYLE(12KV) - Customers: 1,734 5.0 0.3 2.0 363.1 0.6 0.4 276.0 2.1 - - - - 59.7 0.4-18.7 0.0-34.8 1.1 0.9 113.2 1.5 0.9 3rd Party - - - - - - - - - - - - - - - - - - 100% 100% 100% 31% 71% 100% Equipment Failure - - - 98% 95% 100% 1% 0% - - - - 100% 100% - - - - - - - 53% 25% - Operation 68% 94% - 2% 5% - 9% 5% - - - - - - - 100% 100% - - - - 16% 3% - Other - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 32% 6% 100% - - - 90% 94% - - - - - - - - - - - - - - - - 25