Circuit Reliability Review

Circuit Reliability Review Victorville 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 VICTORVILLE District CityList1 ADELANTO APPLE VALLEY HESPERIA MOUNTAIN VIEW ACRES VICTORVILLE WRIGHTWOOD 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 Victorville CircuitList1 There are 50 circuits that serve Victorville 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ADELANTO(12KV) 1,810 MAUNA LOA(12KV) 478 - - ASTOR(12KV) 2,560 MINGO(12KV) 1,294 - - BASE(4.16KV) 46 MIRROR(12KV) 1,433 - - BEELINE(12KV) 2,841 NASSAU(12KV) 1,783 - - BOISE(12KV) 1,526 NEVCAL(4.16KV) 5 - - BRUCITE(12KV) 2,097 NISQUALLY(33KV) 1 - - BURWOOD(12KV) 1,836 OLANCHA(12KV) 1,106 - - CEMENT(33KV) 8 OLD TRAILS(33KV) 4 - - COALINGA(12KV) 1,232 OUTPOST(12KV) 1,959 - - CORTA(4.16KV) 280 PORTLAND(33KV) 10 - - DON(4.16KV) 292 PRAYER(12KV) 1,222 - - DONERT(12KV) 1,333 PYRAMID(12KV) 1,619 - - EAGLE RANCH(12KV) 1,844 RUSS BOYD(33KV) 1 - - FLUE(12KV) 1,604 SEALS(12KV) 964 - - FREIGHTLINER(12KV) 1,040 SENECA(33KV) 1 - - FRONTAGE(12KV) 1,701 TALPA(12KV) 1,710 - - GOSS(12KV) 1,286 TURNOUT(12KV) 430 - - GREEN TREE(12KV) 511 WING(12KV) 1,956 - - HATCHERY(12KV) 331 ZASADNI(12KV) 1,768 - - JESS(12KV) 1,647 CISTERN(12KV) 1,171 - - KASOTA(12KV) 1,784 - - - KENWORTH(12KV) 2,062 - - - KOALA(12KV) 2,264 - - - LA PAZ(12KV) 477 - - - LAS PIEDRAS(4.16KV) 257 - - - LATIMER(12KV) 2,088 - - - LORENE(12KV) 3,133 - - - MACK(12KV) 1,106 - - - MAGUA(12KV) 2,136 - - - MANZER(12KV) 2,411 - - - Grand Total 62,458 7

Reliability History of Circuits Serving Victorville (No Exclusions) BarChart 2014 2015 2016 2017 SAIDI (average minutes of sustained interruptions) 160.0 140.0 120.0 100.0 80.0 60.0 40.0 20.0 58.4 112.1 114.8 79.3 53.4 134.5 70.0 139.7 Victorville 0.0 SAIFI (average frequency of sustained interruptions) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.4 1.0 0.9 0.9 0.7 1.1 0.9 1.2 SCE SYSTEMWIDE ** Exclusions are days which utilities are allowed to MAIFI (average frequency of momentary interruptions) 2.5 2.0 1.5 1.0 0.5 0.5 1.4 1.4 1.3 1.1 1.6 2.0 1.8 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

Causes of Repair Outages in Victorville 2017 SAIDIChart Vegetation /Animal 6.9% Weather /Fire Contributions to SAIDI by Outage Cause /Earthquake 4.6% 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 8.2% Operation 9.2% 3rd Party 16.9% Equipment Failure 54.2% 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 Victorville 2017 SAIFIChart Weather /Fire /Earthquake 6.1% Contributions to SAIFI by Outage Cause 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 Vegetation /Animal 23.0% Other 10.0% Operation 9.0% 3rd Party 16.8% Equipment Failure 35.0% 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 Victorville Updated through Dec 2017

Average Reliability of 50 Circuits Serving Victorville 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 50 Circuits Serving Victorville -- Total Customers: 62,458 58.4 0.4 0.5 79.3 0.9 1.3 53.4 0.7 1.1 24.0 0.3 0.8 13.8 0.3 0.6 23.9 0.2 0.4 8.2 0.1 0.2 70.0 0.9 2.0 3rd Party 21% 27% 11% 6% 10% 11% 20% 21% 26% 12% 9% 24% 28% 11% 3% 14% 24% 45% 24% 46% 61% 17% 17% 25% Equipment Failure 51% 40% 21% 21% 22% 8% 49% 26% 12% 67% 53% 2% 16% 16% 8% 64% 44% 11% 53% 17% 12% 54% 35% 7% Operation 21% 22% 28% 9% 12% 11% 15% 27% 9% 3% 13% 4% 3% 3% - 15% 9% 8% 19% 18% 10% 9% 9% 4% Other 3% 6% 35% 19% 7% 41% 13% 24% 44% 7% 3% 39% 19% 11% 24% 6% 22% 31% 1% 1% - 8% 10% 29% Vegetation/Animal 0% 0% 0% 3% 28% 4% 0% 0% 5% 1% 10% 4% 31% 52% 56% 0% 0% 0% 3% 19% 16% 7% 23% 20% Weather/Fire/Earthquake 4% 5% 5% 42% 20% 25% 3% 2% 5% 10% 12% 28% 3% 6% 8% 1% 1% 4% - - - 5% 6% 14% 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 Victorville - 1 of 13 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 ADELANTO(12KV) - Customers: 1,810 15.9 0.1 - - - - 26.6 0.2 1.0 - - CircuitHistory 1.0 13.3 0.8 0.2 - - - - - - 13.3 0.8 1.2 3rd Party - - - - - - - - - - - 1- - - - - - - - - - - - - Equipment Failure 86% 76% - - - - 52% 32% 100% - - - - - - - - - - - - - - - Operation 14% 24% - - - - 48% 68% - - - 100% - - - - - - - - - - - 86% Vegetation/Animal - - - - - - - - - - - - 100% 100% 100% - - - - - - 100% 100% 14% ASTOR(12KV) - Customers: 2,560 113.5 1.0 - - - 1.0 - - - - - - 9.3 0.6 0.4 - - - 5.4 0.1-14.6 0.6 0.4 3rd Party 85% 97% - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 15% 3% - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - 100% 100% - 37% 10% - Other - - - - - 100% - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - 100% 100% 100% - - - - - - 63% 90% 100% BASE(4.16KV) - Customers: 46 33.5 1.0 2.0 172.1 3.5 2.8 505.5 3.0 9.4 - - - - - 1.6 7.1 0.0 2.0 - - - 7.1 0.0 3.6 3rd Party - - - - - - 12% 5% - - - - - - - - - - - - - - - - Equipment Failure - - - 84% 43% - 86% 62% - - - - - - - - - - - - - - - - Operation - - - - - - 2% 33% 11% - - - - - - 100% 100% - - - - 100% 100% - Other 100% 100% 100% - - 67% - - 69% - - - - - 100% - - 49% - - - - - 72% Vegetation/Animal - - - - - 33% - - 20% - - - - - - - - 51% - - - - - 28% Weather/Fire/Earthquake - - - 16% 57% - - - - - - - - - - - - - - - - - - - BEELINE(12KV) - Customers: 2,841 15.7 0.1 2.0 190.2 3.0 3.0 99.4 2.0 6.0 24.7 0.1 11.6 18.9 0.8 0.2 97.0 0.2 - - - - 140.7 1.1 11.8 3rd Party - - - - - - - - - - - 9% - - - - - - - - - - - 8% Equipment Failure - - - 31% 66% 31% 61% 50% - - - - 33% 3% - 95% 86% - - - - 70% 16% - Operation 100% 100% 100% - - - 39% 50% - - - - - - - 5% 14% - - - - 4% 2% - Other - - - - - 69% - - 100% 100% 100% 57% - - - - - - - - - 18% 13% 56% Vegetation/Animal - - - - - - - - - - - - 67% 97% 100% - - - - - - 9% 70% 2% Weather/Fire/Earthquake - - - 69% 34% - - - - - - 34% - - - - - - - - - - - 34% 15

Reliability Histories for Individual Circuits Serving Victorville - 2 of 13 CircuitHistory 2 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 BOISE(12KV) - Customers: 1,526 89.6 0.4-364.1 3.7 1.5 14.3 0.1 - - - - - - - 210.5 1.6 1.9 46.7 0.1 0.9 257.2 1.7 2.9 3rd Party - - - - - - - - - - - - - - - - - 51% - - - - - 34% Equipment Failure 76% 45% - 92% 65% 100% 94% 63% - - - - - - - 84% 80% 49% 58% 50% 100% 80% 78% 66% Operation 24% 55% - 6% 7% - 6% 37% - - - - - - - 16% 20% - 42% 50% - 20% 22% - Vegetation/Animal - - - 2% 27% - - - - - - - - - - - - - - - - - - - BRUCITE(12KV) - Customers: 2,097 201.5 1.2 - - - - 11.3 0.0-35.4 1.0 - - - 1.0 - - - - - - 35.4 1.0 1.0 Equipment Failure 72% 91% - - - - 100% 100% - 100% 100% - - - - - - - - - - 100% 100% - Operation 28% 9% - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - 100% - - - - - - - - 100% BURWOOD(12KV) - Customers: 1,836 149.4 1.1-5.7 0.9-61.2 0.9 0.6 0.1 0.0 - - - - 0.4 0.0 0.2 - - - 0.5 0.0 0.2 3rd Party 100% 100% - - - - 11% 13% - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - 89% 87% 100% 100% 100% - - - - - - 100% - - - 28% 13% 100% Vegetation/Animal - - - 100% 100% - - - - - - - - - - 100% 100% - - - - 72% 88% - CEMENT(33KV) - Customers: 8 1124.9 2.6 3.4 694.9 2.9 5.1 188.2 2.2 9.0 - - - 5.9 0.1 - - - 2.1 - - - 5.9 0.1 2.1 3rd Party - - - - - - 2% 15% - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 46% 50% - - - - - - - - - - - - - - - - Operation 1% 23% - - - - 1% 5% 11% - - - - - - - - - - - - - - - Other 81% 62% 68% - - 76% 9% 15% 67% - - - - - - - - 47% - - - - - 47% Vegetation/Animal 18% 15% 32% 19% 31% 24% 43% 15% 22% - - - 100% 100% - - - 53% - - - 100% 100% 53% Weather/Fire/Earthquake - - - 81% 69% - - - - - - - - - - - - - - - - - - - 16

Reliability Histories for Individual Circuits Serving Victorville - 3 of 13 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 CISTERN(12KV) - Customers: 1,171 0.5 0.0 - - - - 91.7 1.0 - - - - - - - - - - - - - - - - 3rd Party - - - - - - 100% 100% - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 0% 0% - - - - - - - - - - - - - - - - Operation 100% 100% - - - - - - - - - - - - - - - - - - - - - - COALINGA(12KV) - Customers: 1,232 34.6 1.0 2.0 94.5 1.0 2.9 115.0 1.0-7.0 0.0-9.0 0.6 0.4 31.3 0.1 - - - - 47.2 0.8 0.4 3rd Party - - - - - - 100% 100% - - - - - - - - - - - - - - - - Equipment Failure 3% 1% - - - - 0% 0% - 96% 57% - 21% 1% - 8% 50% - - - - 23% 11% - Operation 97% 99% 100% 74% 97% 34% - - - 4% 43% - - - - 92% 50% - - - - 62% 10% - Vegetation/Animal - - - - - - - - - - - - 79% 99% 100% - - - - - - 15% 78% 100% Weather/Fire/Earthquake - - - 26% 3% 66% - - - - - - - - - - - - - - - - - - CORTA(4.16KV) - Customers: 280 - - - 2.5 0.0 - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 100% 100% - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - DON(4.16KV) - Customers: 292 - - 1.0 - - - - - - - - 1.0 - - - - - - - - - - - 1.0 Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - 100% - - - - - - - - 100% - - - - - - - - - - - 100% 17

Reliability Histories for Individual Circuits Serving Victorville - 4 of 13 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 DONERT(12KV) - Customers: 1,333 81.1 1.0-143.8 1.2-68.5 1.0 2.0 - - - 2.3 0.0-0.7 0.0 2.2 - - - 3.0 0.0 2.2 3rd Party - - - - - - 100% 100% 50% - - - 100% 100% - - - 45% - - - 76% 43% 45% Equipment Failure 100% 100% - - - - - - 50% - - - - - - - - - - - - - - - Operation - - - 1% 2% - - - - - - - - - - 100% 100% 55% - - - 24% 57% 55% Vegetation/Animal - - - 4% 81% - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 95% 17% - - - - - - - - - - - - - - - - - - - EAGLE RANCH(12KV) - Customers: 1,844 - - - 7.5 0.2 1.0 - - - - - - 128.8 1.2 1.0 - - - - - - 128.8 1.2 1.0 3rd Party - - - 100% 100% 100% - - - - - - 100% 100% - - - - - - - 100% 100% - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - 100% - - - - - - - - 100% FLUE(12KV) - Customers: 1,604 0.6 0.0 0.2 1.2 0.0 0.4 32.0 0.1 1.4 0.7 0.0-3.5 0.0-1.1 0.0 1.0 1.8 0.0-7.1 0.0 1.0 3rd Party - - - - - - - - 30% - - - - - - - - - - - - - - - Equipment Failure 97% 50% 100% 66% 44% - 18% 59% - 100% 100% - 18% 3% - 41% 43% - 100% 100% - 50% 28% - Operation 3% 50% - 23% 44% - 0% 4% - - - - - - - 59% 57% - - - - 9% 9% - Other - - - - - 100% - - - - - - - - - - - 100% - - - - - 100% Vegetation/Animal - - - 11% 11% - - - 70% - - - 82% 97% - - - - - - - 41% 64% - Weather/Fire/Earthquake - - - - - - 82% 38% - - - - - - - - - - - - - - - - FREIGHTLINER(12KV) - Customers: 1,040 7.0 1.0-75.6 1.0 1.0 - - - - - - - - 1.0 14.7 0.1 3.0 0.2 0.0 1.0 15.0 0.1 5.0 Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation 100% 100% - - - - - - - - - - - - - - - - 100% 100% 100% 2% 13% 20% Other - - - 100% 100% 100% - - - - - - - - 100% - - 67% - - - - - 60% Weather/Fire/Earthquake - - - - - - - - - - - - - - - 100% 100% 33% - - - 98% 87% 20% 18

Reliability Histories for Individual Circuits Serving Victorville - 5 of 13 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 FRONTAGE(12KV) - Customers: 1,701 271.0 0.6 3.1 124.1 2.9 3.0 112.0 1.6 1.9 235.3 2.0 1.0 13.0 0.0 0.0 42.2 1.1 1.0 21.8 0.4 1.0 312.2 3.6 3.0 3rd Party - - 28% 66% 33% - 4% 29% 52% 43% 49% 100% - - - - - 100% 64% 96% 100% 37% 38% 99% Equipment Failure 6% 31% - - - - 42% 7% - 54% 49% - 100% 100% 100% 89% 94% - 36% 4% - 59% 59% 1% Operation 94% 69% - 30% 33% 68% 8% 3% - 3% 2% - - - - 11% 6% - - - - 4% 3% - Other - - 72% - - - 46% 61% 48% - - - - - - - - - - - - - - - Vegetation/Animal - - - 5% 33% 32% - - - - - - - - - - - - - - - - - - GOSS(12KV) - Customers: 1,286 - - - - - - 8.0 1.0 - - - - 20.2 1.0 4.0 45.9 1.0 1.0 - - - 66.1 2.0 5.0 3rd Party - - - - - - 100% 100% - - - - - - 25% 100% 100% - - - - 69% 50% 20% Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - 100% - - - - - 20% Vegetation/Animal - - - - - - - - - - - - 0% 0% 25% - - - - - - 0% 0% 20% Weather/Fire/Earthquake - - - - - - - - - - - - 100% 100% 50% - - - - - - 30% 50% 40% GREEN TREE(12KV) - Customers: 511 148.0 1.2 0.8 - - 1.0 5.0 0.0 3.0 - - 1.0 - - - 0.3 0.0 - - - - 0.3 0.0 1.0 3rd Party 38% 83% - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 62% 17% 100% - - - 100% 100% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - 100% 100% - - - - 100% 100% - Other - - - - - 100% - - 67% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - 100% - - - - - - - - - - - 100% Weather/Fire/Earthquake - - - - - - - - 33% - - - - - - - - - - - - - - - HATCHERY(12KV) - Customers: 331 - - - 6.1 1.0 - - - - - - - - - - 91.4 1.0 - - - - 91.4 1.0-3rd Party - - - - - - - - - - - - - - - 100% 100% - - - - 100% 100% - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - 100% 100% - - - - - - - - - - - - - - - - - - - 19

Reliability Histories for Individual Circuits Serving Victorville - 6 of 13 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 JESS(12KV) - Customers: 1,647 - - - 26.9 1.9 1.6 64.2 0.4 2.3 - - - 14.1 0.4 0.4 0.3 0.0 - - - - 14.4 0.4 0.4 3rd Party - - - 51% 49% 10% 1% 0% 43% - - - - - - - - - - - - - - - Equipment Failure - - - 3% 0% 22% 89% 92% - - - - - - - 100% 100% - - - - 2% 1% - Operation - - - 45% 50% 5% - - - - - - 100% 100% - - - - - - - 98% 99% - Other - - - - - 62% 10% 8% 57% - - - - - - - - - - - - - - - Vegetation/Animal - - - 1% 0% - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - 100% - - - - - - - - 100% KASOTA(12KV) - Customers: 1,784 - - - 29.0 0.1 1.7 0.2 0.0-12.6 1.7 0.3 - - - 37.6 0.9 1.1 77.7 0.1-127.9 2.8 1.4 3rd Party - - - - - 100% - - - - - - - - - 100% 100% 100% - - - 29% 33% 80% Equipment Failure - - - 93% 45% - 100% 100% - - - - - - - - - - 97% 54% - 59% 2% - Operation - - - 7% 55% - - - - 48% 58% - - - - - - - 3% 46% - 6% 38% - Vegetation/Animal - - - - - - - - - 52% 42% 100% - - - - - - - - - 5% 27% 20% KENWORTH(12KV) - Customers: 2,062 9.0 0.1-83.6 0.4 5.4 25.5 0.1 1.0 1.7 0.0-38.4 1.0 0.7 117.8 0.3 0.9 28.0 0.4-186.0 1.8 1.6 3rd Party 95% 99% - 24% 30% 19% - - - - - - - - - - - - - - - - - - Equipment Failure 5% 1% - 39% 40% - 90% 63% - 100% 100% - 100% 100% 100% 93% 97% 74% 91% 69% - 94% 92% 85% Operation - - - 4% 10% - - - - - - - - - - - - - 9% 31% - 1% 8% - Other - - - 10% 9% 27% 10% 37% 100% - - - - - - 7% 3% 26% - - - 4% 1% 15% Weather/Fire/Earthquake - - - 23% 10% 54% - - - - - - - - - - - - - - - - - - KOALA(12KV) - Customers: 2,264 0.0 0.0 1.1 0.1 0.0 2.0 0.6 0.0 2.0 68.5 1.0 1.0 8.6 0.2 1.8 1.4 0.0 1.0 - - - 78.5 1.2 3.8 3rd Party - - - - - - 4% 33% 100% - - - - - - - - - - - - - - - Equipment Failure - - 100% 100% 100% - 96% 67% - - - - 1% 1% - 100% 100% - - - - 2% 2% - Operation 100% 100% - - - - - - - - - - 33% 13% - - - - - - - 4% 2% - Other - - - - - 100% - - - - - - - - 54% - - 100% - - - - - 52% Vegetation/Animal - - - - - - - - - - - - 66% 86% 46% - - - - - - 7% 14% 22% Weather/Fire/Earthquake - - - - - - - - - 100% 100% 100% - - - - - - - - - 87% 81% 26% 20

Reliability Histories for Individual Circuits Serving Victorville - 7 of 13 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 LA PAZ(12KV) - Customers: 477 109.3 3.0 3.6 339.9 0.8 4.5 49.7 1.0 3.0 19.9 0.0 2.0 - - - - - - - - - 19.9 0.0 2.0 3rd Party - - - - - 18% - - - - - 50% - - - - - - - - - - - 50% Equipment Failure 40% 67% 15% - - - - - - 100% 100% - - - - - - - - - - 100% 100% - Operation - - - 0% 0% - - - - - - - - - - - - - - - - - - - Other 60% 33% 85% - - 64% 100% 100% 67% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - 50% - - - - - - - - - - - 50% Weather/Fire/Earthquake - - - 100% 100% 18% - - 33% - - - - - - - - - - - - - - - LAS PIEDRAS(4.16KV) - Customers: 257 - - - 2.0 0.0 - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - - - - - - - - - - - - - - - - - LATIMER(12KV) - Customers: 2,088 - - - 10.0 0.1 - - - - - - - - - 1.0 - - - - - - - - 1.0 Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - 100% - - - - - - - - 100% LORENE(12KV) - Customers: 3,133 73.0 0.3 0.3 176.8 2.0 2.7 7.4 0.1 1.0 - - 1.0 - - 1.0 21.9 1.0 - - - - 21.9 1.0 2.0 3rd Party 22% 30% 84% - - - - - 100% - - 100% - - - - - - - - - - - 50% Equipment Failure 63% 40% 16% 1% 0% - 100% 100% - - - - - - - - - - - - - - - - Operation 15% 30% - 8% 1% 27% - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - 100% 100% 100% - - - - 100% 100% 50% Vegetation/Animal - - - 3% 49% - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 88% 49% 73% - - - - - - - - - - - - - - - - - - 21

Reliability Histories for Individual Circuits Serving Victorville - 8 of 13 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 MACK(12KV) - Customers: 1,106 - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - MAGUA(12KV) - Customers: 2,136 - - - 0.4 0.0 - - - - - - - - - 1.0 - - - - - - - - 1.0 Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - 100% - - - - - - - - 100% MANZER(12KV) - Customers: 2,411 2.3 0.0 0.9 5.9 0.4-216.8 3.1-3.6 0.0-53.9 1.0 1.0 - - - 12.5 0.1-70.0 1.1 1.0 Equipment Failure 100% 100% - 100% 100% - 61% 32% - - - - - - - - - - - - - - - - Operation - - - - - - 39% 68% - 100% 100% - - - - - - - 100% 100% - 23% 10% - Other - - 100% - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - 100% 100% 100% - - - - - - 77% 90% 100% MAUNA LOA(12KV) - Customers: 478 - - - - - - - - 1.5 - - - - - - - - - - - - - - - 3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - 22

Reliability Histories for Individual Circuits Serving Victorville - 9 of 13 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 MINGO(12KV) - Customers: 1,294 84.1 1.0 0.5 6.7 1.1-491.8 8.1 3.1 - - - - - - 91.5 1.1 1.0 - - - 91.5 1.1 1.0 3rd Party 84% 96% 100% - - - - - - - - - - - - - - 100% - - - - - 100% Equipment Failure 16% 4% - 3% 0% - 49% 14% 36% - - - - - - 100% 100% - - - - 100% 100% - Operation - - - - - - 3% 13% 64% - - - - - - - - - - - - - - - Other - - - - - - 48% 74% - - - - - - - - - - - - - - - - Vegetation/Animal - - - 97% 100% - - - - - - - - - - - - - - - - - - - MIRROR(12KV) - Customers: 1,433 160.0 2.1 1.0 16.3 0.1-45.5 0.3 - - - - - - - 24.1 0.2 - - - - 24.1 0.2 - Equipment Failure 37% 52% - 100% 100% - 74% 48% - - - - - - - - - - - - - - - - Operation - - - - - - 26% 52% - - - - - - - 100% 100% - - - - 100% 100% - Other - - 100% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 63% 48% - - - - - - - - - - - - - - - - - - - - - - NASSAU(12KV) - Customers: 1,783 0.1 0.0-0.5 0.0-2.5 0.0-371.4 2.9-4.8 0.3 0.7 74.2 0.3 - - - - 450.5 3.5 0.7 3rd Party - - - - - - - - - - - - - - - 38% 50% - - - - 6% 4% - Equipment Failure 100% 100% - 100% 100% - - - - 100% 100% - - - - - - - - - - 82% 83% - Operation - - - - - - 100% 100% - - - - - - - 62% 50% - - - - 10% 4% - Vegetation/Animal - - - - - - - - - - - - 100% 100% 100% - - - - - - 1% 9% 100% NEVCAL(4.16KV) - Customers: 5 - - 0.8 28.0 2.0 2.0 518.8 3.0 9.0 - - - 78.0 1.0 - - - 2.0 - - - 78.0 1.0 2.0 3rd Party - - - - - - - - - - - - 100% 100% - - - - - - - 100% 100% - Equipment Failure - - - - - - 98% 67% - - - - - - - - - - - - - - - - Operation - - - - - - 2% 33% 11% - - - - - - - - - - - - - - - Other - - 100% - - 50% - - 67% - - - - - - - - 50% - - - - - 50% Vegetation/Animal - - - - - 50% - - 22% - - - - - - - - 50% - - - - - 50% Weather/Fire/Earthquake - - - 100% 100% - - - - - - - - - - - - - - - - - - - 23

Reliability Histories for Individual Circuits Serving Victorville - 10 of 13 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 NISQUALLY(33KV) - Customers: 1 - - - - - - - - 3.0 404.0 1.0 7.0 - - 1.0 - - - - - - 404.0 1.0 8.0 Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - 100% 100% - - - - - - - - - - 100% 100% - Other - - - - - - - - 100% - - 100% - - - - - - - - - - - 88% Weather/Fire/Earthquake - - - - - - - - - - - - - - 100% - - - - - - - - 13% OLANCHA(12KV) - Customers: 1,106 69.5 3.0 3.3 175.6 3.3 1.0 11.0 0.1 2.7 28.1 1.0-20.8 1.7 1.3 0.5 0.0 - - - - 49.4 2.7 1.3 3rd Party - - - 16% 30% 100% - - 37% - - - - - - - - - - - - - - - Equipment Failure 42% 55% 30% - - - 11% 10% - 85% 99% - 44% 59% - 100% 100% - - - - 68% 74% - Operation 8% 22% 61% 7% 30% - - - - 15% 1% - - - - - - - - - - 9% 0% - Other 50% 23% 9% - - - - - - - - - - - 76% - - - - - - - - 76% Vegetation/Animal - - - - - - 69% 85% - - - - 56% 41% 24% - - - - - - 24% 26% 24% Weather/Fire/Earthquake - - - 77% 40% - 20% 5% 63% - - - - - - - - - - - - - - - OLD TRAILS(33KV) - Customers: 4 665.3 2.7 4.0 355.1 3.3 8.7 470.3 7.3 3.0 - - - - - 1.8 - - 1.5 - - - - - 3.3 3rd Party - - - 6% 33% - - - - - - - - - - - - - - - - - - - Equipment Failure 92% 38% - 90% 33% - 54% 59% - - - - - - - - - - - - - - - - Operation - - - - - - 5% 14% - - - - - - - - - - - - - - - - Other 8% 63% 100% 4% 33% 100% - - 67% - - - - - 57% - - 100% - - - - - 77% Vegetation/Animal - - - - - - 41% 28% 33% - - - - - 43% - - - - - - - - 23% OUTPOST(12KV) - Customers: 1,959 - - - - - - 1.5 0.2 2.8 - - - 3.9 0.2 0.8 - - - 4.6 0.0-8.5 0.3 0.8 Equipment Failure - - - - - - 100% 100% 64% - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - 100% 100% - 54% 11% - Other - - - - - - - - 36% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - 100% 100% 100% - - - - - - 46% 89% 100% 24

Reliability Histories for Individual Circuits Serving Victorville - 11 of 13 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 PORTLAND(33KV) - Customers: 10 73.6 0.4-167.2 1.1 4.0 - - - - - - - - - - - 2.0 - - - - - 2.0 Equipment Failure - - - 100% 100% - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - 50% - - - - - 50% Other 100% 100% - - - 100% - - - - - - - - - - - 50% - - - - - 50% PRAYER(12KV) - Customers: 1,222 0.3 0.0 1.0 252.0 0.9-6.8 0.0-10.2 0.4 - - - - 1.1 0.0-4.9 0.0-16.3 0.4 - Equipment Failure - - - 0% 0% - - - - - - - - - - 100% 100% - - - - 7% 2% - Operation 100% 100% - - - - - - - 100% 100% - - - - - - - - - - 63% 92% - Other - - - - - - 100% 100% - - - - - - - - - - 100% 100% - 30% 6% - Weather/Fire/Earthquake - - 100% 100% 100% - - - - - - - - - - - - - - - - - - - PYRAMID(12KV) - Customers: 1,619 2.0 0.0-86.0 1.0 0.8 2.3 0.0-1.2 0.0-0.4 0.0-1.7 0.0-0.1 0.0-3.4 0.0 - Equipment Failure - - - 100% 100% 100% - - - - - - 100% 100% - - - - - - - 12% 13% - Operation 100% 100% - - - - - - - - - - - - - - - - 100% 100% - 2% 4% - Other - - - - - - 100% 100% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - 100% 100% - - - - 100% 100% - - - - 87% 83% - RUSS BOYD(33KV) - Customers: 1 - - - 840.0 2.0-1024.0 1.0 - - - - - - - - - - - - - - - - Equipment Failure - - - 100% 100% - 100% 100% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - 25

Reliability Histories for Individual Circuits Serving Victorville - 12 of 13 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 CircuitHistory12 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SEALS(12KV) - Customers: 964 0.1 0.0 2.0 702.6 4.0 1.4 128.7 1.8 2.7 5.4 0.6 0.3 0.3 0.0 - - - - 40.2 1.1-45.9 1.7 0.3 3rd Party - - - - - 1% 18% 55% - - - - - - - - - - 100% 100% - 88% 62% - Equipment Failure - - - 2% 2% - 43% 10% - 4% 0% - - - - - - - - - - 1% 0% - Operation - - - 0% 4% - - - 37% - - - - - - - - - - - - - - - Other - - 100% 51% 25% 1% - - 37% - - - - - - - - - - - - - - - Vegetation/Animal 100% 100% - 10% 30% 98% - - - 96% 100% 100% 100% 100% - - - - - - - 12% 38% 100% Weather/Fire/Earthquake - - - 37% 39% - 39% 36% 26% - - - - - - - - - - - - - - - SENECA(33KV) - Customers: 1 - - - 279.0 1.0 1.0 136.0 1.0 1.0 38.0 1.0 - - - - - - - - - - 38.0 1.0 - Equipment Failure - - - - - - 100% 100% - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - - - - - - - - - - - - - - - - - Other - - - - - 100% - - 100% 100% 100% - - - - - - - - - - 100% 100% - TALPA(12KV) - Customers: 1,710 26.2 0.1-291.8 2.1 1.6 157.9 1.0 5.0 - - 2.0 - - 1.0 1.0 0.0 1.0 35.6 0.3 2.8 36.6 0.3 6.8 3rd Party - - - - - - 90% 95% 40% - - 100% - - - - - 100% 54% 74% 96% 53% 74% 84% Equipment Failure 99% 97% - 9% 2% - 2% 1% - - - - - - 100% 100% 100% - 39% 10% - 41% 11% 15% Operation 1% 3% - - - - 8% 4% 20% - - - - - - - - - 6% 16% 4% 6% 16% 2% Other - - - 88% 49% 100% - - 20% - - - - - - - - - - - - - - - Vegetation/Animal - - - 2% 49% - 0% 1% 20% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 1% 0% - - - - - - - - - - - - - - - - - - - TURNOUT(12KV) - Customers: 430 21.7 1.0-21.8 0.0 1.0 2.9 0.0 2.0 - - - - - - - - - 56.3 1.0-56.3 1.0-3rd Party - - - - - - - - - - - - - - - - - - 100% 100% - 100% 100% - Equipment Failure 100% 100% - - - - 91% 71% - - - - - - - - - - - - - - - - Operation - - - 100% 100% - 9% 29% - - - - - - - - - - - - - - - - Other - - - - - - - - 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - 100% - - - - - - - - - - - - - - - - - - 26

Reliability Histories for Individual Circuits Serving Victorville - 13 of 13 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 CircuitHistory13 SAIFI MAIFI SAIDI SAIFI MAIFI WING(12KV) - Customers: 1,956 61.5 0.7 0.7 143.0 1.7 8.2 0.8 0.0-18.1 0.1 0.4 85.0 1.1 0.8 1.3 0.0 1.0 9.3 0.5 1.4 113.8 1.8 3.7 3rd Party - - 100% 8% 27% - 3% 9% - - - - - - - - - 100% 2% 0% 32% 0% 0% 39% Equipment Failure 0% 0% - 4% 1% - 97% 91% - 7% 20% 100% 1% 0% - 100% 100% - 14% 0% - 4% 2% 12% Operation 100% 100% - 46% 11% 10% - - - - - - - - - - - - - - - - - - Other - - - 29% 2% 60% - - - 93% 80% - 99% 100% 100% - - - - - - 89% 68% 22% Vegetation/Animal - - - 4% 58% - - - - - - - - - - - - - 84% 99% 68% 7% 30% 27% Weather/Fire/Earthquake - - - 8% 1% 30% - - - - - - - - - - - - - - - - - - ZASADNI(12KV) - Customers: 1,768 460.3 0.3 1.1 - - - 198.2 1.0 0.1 - - - - - 1.0 - - - - - - - - 1.0 Equipment Failure 100% 100% 100% - - - 100% 100% 100% - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - 100% - - - - - - - - 100% 27